Dodge 2006 Sprinter User manual

TABLE OF CONTENTS
1.0 INTRODUCTION.........................................................1
1.1 SYSTEMCOVERAGE ...............................................1
1.2 SIX-STEP TROUBLESHOOTING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . .1
2.0 IDENTIFICATIONOFSYSTEM.............................................1
3.0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION . . . . . . . . . . . . . . . . . . . . . .1
3.1 AIRBAGSYSTEM...................................................1
3.1.1 DRIVERAIRBAG............................................2
3.1.2 CLOCKSPRING.............................................3
3.1.3 PASSENGERAIRBAG .......................................3
3.1.4 SEATBELTTENSIONERS....................................3
3.1.5 SPECIALTOOLS............................................3
3.1.6 DIAGNOSTICTROUBLECODES..............................4
3.1.6.1 ACTIVECODES ............................................4
3.1.6.2 STOREDCODES ...........................................4
3.2 COMMUNICATION..................................................4
3.2.1 COMMUNICATIONK-LINES ..................................4
3.2.2 CANBUS..................................................5
3.3 HEATING&A/CSYSTEM ............................................5
3.3.1 AUTOMATIC TEMPERATURE CONTROL (ATC) . . . . . . . . . . . . . . . . . .5
3.3.1.1 SYSTEMCONTROLS........................................5
3.3.1.2 SYSTEMDIAGNOSTICS.....................................5
3.3.2 CABIN HEATER MODULE (CHM) & HEATER BOOSTER MODULE
(HBM).....................................................7
3.3.2.1 SYSTEMDESCRIPTION .....................................7
3.3.2.2 VENTING THE HEATER’S EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.3.2.3 SYSTEMDIAGNOSTICS.....................................8
3.4 INSTRUMENTCLUSTER.............................................9
3.5 POWERDOORLOCKS/RKE..........................................9
3.5.1 CENTRALLOCKING.........................................9
3.5.2 REMOTEKEYLESSENTRY(RKE).............................9
3.5.3 AUTODOORLOCKS.......................................10
3.5.4 ACCIDENTRESPONSE.....................................10
3.6 VEHICLE THEFT SECURITY SYSTEM (VTSS) . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.7 USING THE DRBIII!................................................11
3.8 DRBIII!ERRORMESSAGES.........................................11
3.9 DRBIII!DOES NOT POWER UP (BLANK SCREEN). . . . . . . . . . . . . . . . . . . . . .11
3.10 DISPLAYISNOTVISIBLE...........................................11
4.0 DISCLAIMERS,SAFETY,WARNINGS......................................11
4.1 DISCLAIMERS.....................................................11
4.2 SAFETY..........................................................11
4.2.1 TECHNICIAN SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . .11
4.2.2 VEHICLE PREPARATION FOR TESTING. . . . . . . . . . . . . . . . . . . . . . .12
4.2.3 SERVICINGSUB-ASSEMBLIES ..............................12
4.2.4 DRBIII!SAFETYINFORMATION .............................12
4.3 WARNINGS.......................................................12
4.3.1 VEHICLEDAMAGEWARNINGS..............................12
4.3.2 ROAD TESTING A COMPLAINT VEHICLE . . . . . . . . . . . . . . . . . . . . . .12
i

TABLE OF CONTENTS - Continued
5.0 REQUIREDTOOLSANDEQUIPMENT .....................................13
6.0 GLOSSARYOFTERMS..................................................13
7.0 DIAGNOSTIC INFORMATION AND PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . .15
AIRBAG
AIRBAG WARNING INDICATOR - DRIVER HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
AIRBAG WARNING INDICATOR - DRIVER LOW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
DRIVER SEAT BELT TENSIONER - INCORRECT FEEDBACK . . . . . . . . . . . . . . . . . .22
DRIVER SQUIB 1 - INCORRECT FEEDBACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
INTERNAL1 ...........................................................22
INTERNAL2 ...........................................................22
INTERNAL3 ...........................................................22
PASSENGER SEAT BELT TENSIONER - INCORRECT FEEDBACK . . . . . . . . . . . . . .22
PASSENGER SQUIB 1 - INCORRECT FEEDBACK. . . . . . . . . . . . . . . . . . . . . . . . . . . .22
STOREDENERGYFIRING1..............................................22
STOREDENERGYFIRING2..............................................22
DRIVER SEAT BELT TENSIONER CIRCUIT OPEN. . . . . . . . . . . . . . . . . . . . . . . . . . . .24
DRIVER SEAT BELT TENSIONER CIRCUIT SHORT . . . . . . . . . . . . . . . . . . . . . . . . . .26
DRIVER SEAT BELT TENSIONER SHORT TO BATTERY. . . . . . . . . . . . . . . . . . . . . . .28
DRIVER SEAT BELT TENSIONER SHORT TO GROUND . . . . . . . . . . . . . . . . . . . . . . .31
DRIVERSQUIB1CIRCUITOPEN .........................................33
DRIVERSQUIB1CIRCUITSHORT........................................36
DRIVERSQUIB1SHORTTOBATTERY....................................39
DRIVERSQUIB1SHORTTOGROUND ....................................42
LOSSOFIGNITIONRUN-START.........................................45
PASSENGER SEAT BELT TENSIONER CIRCUIT OPEN . . . . . . . . . . . . . . . . . . . . . . .47
PASSENGER SEAT BELT TENSIONER CIRCUIT SHORT . . . . . . . . . . . . . . . . . . . . . .49
PASSENGER SEAT BELT TENSIONER SHORT TO BATTERY . . . . . . . . . . . . . . . . . .51
PASSENGER SEAT BELT TENSIONER SHORT TO GROUND . . . . . . . . . . . . . . . . . .54
PASSENGERSQUIB1CIRCUITOPEN.....................................56
PASSENGERSQUIB1CIRCUITSHORT....................................59
PASSENGER SQUIB 1 SHORT TO BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
PASSENGER SQUIB 1 SHORT TO GROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
*AIRBAG WARNING INDICATOR FLASHING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
CABIN HEATER
A.HEATERPRE-TEST...................................................69
CIRCPUMPCONTROLOPEN ............................................72
CIRCPUMPCONTROLSHORTED.........................................74
COMBUSTFANSHORTED...............................................76
COMBUSTFANSPEEDINCORRECT ......................................76
COMBUSTIONFANOPEN................................................76
CONTROLUNITFAULTY.................................................77
DOSINGPUMPOPEN...................................................78
DOSINGPUMPSHORTED ...............................................81
FANSTAGE1RELAYCONTROLOPEN ....................................83
FANSTAGE1RELAYCONTROLSHORTED.................................85
FLAMEDETECTPRIORTOCOMBUST.....................................87
FLAMEOUT ...........................................................88
NOSTART.............................................................88
FLAMESENSOROPEN..................................................91
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TABLE OF CONTENTS - Continued
FLAMESENSORSHORTED..............................................91
GLOWPINOPEN.......................................................91
GLOWPINSHORTED...................................................91
HEATERINLOCKOUTMODE.............................................93
HEATEROVERHEATED..................................................93
SUCCESSIVEOVERHEATING ............................................93
OVERVOLTAGE........................................................96
OVERHEATINGSENSOROPEN...........................................97
OVERHEATINGSENSORSHORTED.......................................97
TEMPSENSOROPEN...................................................98
TEMPSENSORSHORTED...............................................98
UNDERVOLTAGE ......................................................99
COMMUNICATION
*NO RESPONSE FROM AIRBAG CONTROL MODULE .......................102
*NO RESPONSE FROM AUTOMATIC TEMPERATURE CONTROL..............104
*NO RESPONSE FROM CABIN HEATER MODULE ..........................106
*NO RESPONSE FROM CENTRAL TIMER MODULE .........................108
*NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE . . . . . . . . . . . . . . . . . . .110
*NO RESPONSE FROM ENGINE CONTROL MODULE . . . . . . . . . . . . . . . . . . . . . . .112
*NO RESPONSE FROM HEATER BOOSTER MODULE . . . . . . . . . . . . . . . . . . . . . . .114
*NO RESPONSE FROM INSTRUMENT CLUSTER . . . . . . . . . . . . . . . . . . . . . . . . . . .116
*NORESPONSEFROMRADIO ..........................................118
*NO RESPONSE FROM SECURITY SYSTEM MODULE ......................120
*NO RESPONSE FROM SENTRY KEY REMOTE ENTRY MODULE .............122
*NO RESPONSE FROM SHIFTER ASSEMBLY ..............................124
*NO RESPONSE FROM TRANSMISSION CONTROL MODULE ................126
HEATING & A/C
A/C COMPRESSOR CONTROL HIGH OR OPEN (ACTIVE)....................128
A/C COMPRESSOR CONTROL HIGH OR OPEN (STORED)...................130
A/C COMPRESSOR CONTROL SHORTED LOW (STORED) ...................130
AIR OUTLET TEMP SENSOR HIGH OR OPEN (STORED) ....................130
AIR OUTLET TEMP SENSOR SHORTED LOW (STORED) ....................130
AUX FAN RELAY CONTROL HIGH OR OPEN (STORED) .....................130
AUX FAN RELAY CONTROL SHORTED LOW (STORED) .....................130
BLOWER STAGE 1 HIGH OR OPEN (STORED) .............................130
BLOWER STAGE 1 SHORTED LOW (STORED) .............................130
CABIN HEATER CONTROL HIGH OR OPEN (STORED) ......................130
CABIN HEATER CONTROL SHORTED LOW (STORED) ......................130
CIRC PUMP CONTROL HIGH OR OPEN (STORED) .........................130
CIRC PUMP CONTROL SHORTED LOW (STORED) .........................130
EVAP TEMP SENSOR HIGH OR OPEN (STORED) ..........................130
EVAP TEMP SENSOR SHORTED LOW (STORED) ..........................130
NO COMMUNICATION BUS (STORED) ....................................130
NO COMMUNICATION WITH ECM (STORED) ..............................130
NO COMMUNICATION WITH IC (STORED).................................130
RECIRC AIR SOLENOID CONTROL HIGH OR OPEN (STORED) ...............130
RECIRC AIR SOLENOID CONTROL SHORTED LOW (STORED) ...............130
REFRIG PRESS SENSOR HIGH OR OPEN (STORED) .......................130
REFRIG PRESS SENSOR SHORTED LOW (STORED) .......................130
WATER CYCLE VALVE CONTROL HIGH OR OPEN (STORED) ................130
WATER CYCLE VALVE CONTROL SHORTED LOW (STORED) ................130
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TABLE OF CONTENTS - Continued
A/C COMPRESSOR CONTROL SHORTED LOW (ACTIVE)....................132
AIR OUTLET TEMP SENSOR HIGH OR OPEN (ACTIVE) .....................134
AIR OUTLET TEMP SENSOR SHORTED LOW (ACTIVE) .....................136
ATC FUNCTION TEST COOL FAILURE ....................................138
ATC FUNCTION TEST FAILURE ..........................................138
ATC FUNCTION TEST HEAT FAILURE.....................................138
AUX FAN RELAY CONTROL HIGH OR OPEN (ACTIVE) ......................140
AUX FAN RELAY CONTROL SHORTED LOW (ACTIVE) ......................142
BLOWER STAGE 1 HIGH OR OPEN (ACTIVE) ..............................144
BLOWER STAGE 1 SHORTED LOW (ACTIVE) ..............................146
CABIN HEATER CONTROL HIGH OR OPEN (ACTIVE) .......................148
CABIN HEATER CONTROL SHORTED LOW (ACTIVE) .......................150
CIRC PUMP CONTROL HIGH OR OPEN (ACTIVE) ..........................152
CIRC PUMP CONTROL SHORTED LOW (ACTIVE) ..........................154
EVAP TEMP SENSOR HIGH OR OPEN (ACTIVE) ...........................156
EVAP TEMP SENSOR SHORTED LOW (ACTIVE) ...........................158
NO COMMUNICATION BUS (ACTIVE) .....................................160
NO COMMUNICATION WITH ECM (ACTIVE) ...............................163
NO COMMUNICATION WITH IC (ACTIVE)..................................165
RECIRC AIR SOLENOID CONTROL HIGH OR OPEN (ACTIVE) ................167
RECIRC AIR SOLENOID CONTROL SHORTED LOW (ACTIVE) ................169
REFRIG PRESS SENSOR HIGH OR OPEN (ACTIVE) ........................171
REFRIG PRESS SENSOR SHORTED LOW (ACTIVE) ........................173
WATER CYCLE VALVE CONTROL HIGH OR OPEN (ACTIVE) .................175
WATER CYCLE VALVE CONTROL SHORTED LOW (ACTIVE) .................177
INSTRUMENT CLUSTER
AMBIENT TEMP SENSOR OPEN/SHORT TO BATTERY ......................179
AMBIENT TEMP SENSOR SHORT TO GROUND ............................181
FUEL LEVEL SENSOR OPEN/SHORT TO BATTERY .........................182
FUEL LEVEL SENSOR SHORT TO GROUND ...............................184
INSTRUMENT CLUSTER INTERNAL FAILURE B1043 ........................185
INSTRUMENT CLUSTER INTERNAL FAILURE B1053 ........................186
INSTRUMENT CLUSTER OVERVOLTAGE..................................187
NO CAN COMMUNICATION WITH ABS ....................................188
NO CAN COMMUNICATION WITH ECM ...................................190
NO CAN COMMUNICATION WITH TCM....................................192
PREGLOW INDICATOR LAMP FAILURE ...................................194
SRS INDICATOR LAMP FAILURE .........................................195
POWER DOOR LOCKS/RKE
DRIVER DOOR AJAR INDICATOR DRIVER CIRCUIT SHORT TO GROUND ......196
PASSENGER DOOR AJAR INDICATOR DRIVER CIRCUIT SHORT TO GROUND .198
REPLACE CONTROL MODULE ..........................................200
RKE INTERFACE CIRCUIT SHORT TO GROUND - CTM......................201
RKE INTERFACE CIRCUIT SHORT TO GROUND - SKREEM ..................203
RKE INTERFACE CIRCUIT SHORT TO VOLTAGE - CTM .....................205
RKE INTERFACE CIRCUIT SHORT TO VOLTAGE - SKREEM..................206
THE ACM HAS UNLOCKED THE DOORS ..................................208
UNKNOWN TROUBLE CODE UNKNOWN DTC TYPE 2 ......................209
*RKE INOPERATIVE....................................................210
*RKEPOORRANGE ...................................................211
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TABLE OF CONTENTS - Continued
VEHICLE THEFT/SECURITY
DRIVER CYLINDER LOCK SWITCH CIRCUIT SHORT TO GROUND ............212
DRIVER CYLINDER UNLOCK SWITCH CIRCUIT SHORT TO GROUND .........214
FRONT DOOR JAMB SWITCH CIRCUIT SHORT TO GROUND ................216
INTERNAL ERROR - SSM ...............................................218
TOWING INCLINATION SENSOR BEYOND LIMITS ..........................218
TOWING INCLINATION SENSOR VALUE IS INVALID.........................218
TOWING INCLINATION SENSOR VALUE IS MISSING ........................218
INTRUSION SENSOR 1 CIRCUIT OPEN/SHORT TO GROUND ................220
INTRUSION SENSOR 1 GROUND CIRCUIT OPEN ..........................222
INTRUSION SENSOR 2 CIRCUIT OPEN/SHORT TO GROUND ................223
INTRUSION SENSOR 2 GROUND CIRCUIT OPEN ..........................225
INTRUSION SENSOR 3 CIRCUIT OPEN/SHORT TO GROUND ................226
INTRUSION SENSOR 3 GROUND CIRCUIT OPEN ..........................228
REAR OR SLIDING DOOR JAMB SWITCH CIRCUIT SHORT TO GROUND ......229
RKE INTERFACE CIRCUIT FAILURE - SSM ................................231
SECURITY SYSTEM INTERFACE FAILURE - SSM...........................233
SIREN CIRCUIT OPEN/SHORTED TO GROUND ............................235
SIREN INTERNAL FAILURE .............................................237
SIREN SIGNAL CONTROL CIRCUIT SHORT TO GROUND ....................238
WINDSHIELD WIPER & WASHER
CHECKING THE RAIN SENSOR/WIPER OPERATION ........................239
VERIFICATION TESTS
VERIFICATION TESTS ..................................................244
8.0 COMPONENT LOCATIONS ..............................................249
8.1 AIRBAG SYSTEM .................................................249
8.2 AIRBAG CONTROL MODULE .......................................249
8.3 DRIVER AIRBAG SQUIB ...........................................249
8.4 CLOCKSPRING ..................................................250
8.5 SEAT BELT TENSIONER ...........................................250
8.6 HEATING & A/C...................................................250
8.6.1 AUTOMATIC TEMPERATURE CONTROL (ATC) SYSTEM
COMPONENTS ...........................................250
8.6.2 CABIN HEATER & HEATER BOOSTER SYSTEM COMPONENTS .251
8.6.3 AUTO TEMP CONTROL, CABIN HEATER, & HEATER BOOSTER
FUSES & RELAYS ........................................251
8.6.4 EVAP TEMP SENSOR & AIR OUTLET TEMP SENSOR ..........251
8.7 INSTRUMENT CLUSTER ...........................................252
8.7.1 AMBIENT TEMPERATURE SENSOR .........................252
8.8 POWER DOOR LOCKS/RKE ........................................252
8.8.1 CENTRAL TIMER MODULE.................................252
8.8.2 SENTRY KEY REMOTE ENTRY MODULE.....................253
8.8.3 DOOR LOCK MOTOR/AJAR SWITCH ........................253
8.8.4 CONTACT PLATES ........................................253
8.8.5 DOOR LOCK MOTOR/AJAR SWITCH CONNECTORS ...........254
v

TABLE OF CONTENTS - Continued
8.9 VEHICLE THEFT SECURITY SYSTEM................................254
8.9.1 SECURITY SYSTEM MODULE ..............................254
8.9.2 INTRUSION SENSORS ....................................254
8.9.3 SWITCHES ..............................................255
8.9.4 SIREN ..................................................255
9.0 CONNECTOR PINOUTS ................................................257
A/C AUXILIARY FAN....................................................257
AIR OUTLET TEMPERATURE SENSOR ...................................257
AIRBAG CONTROL MODULE - YELLOW...................................257
AIRBAG SQUIB-DRIVER - YELLOW.......................................258
AIRBAG SQUIB-PASSENGER - YELLOW ..................................258
AMBIENT TEMPERATURE SENSOR ......................................258
AUTOMATIC TEMPERATURE CONTROL MODULE C1 - BROWN ..............259
AUTOMATIC TEMPERATURE CONTROL MODULE C2 .......................259
AUXILIARY HEATER CONTROL ..........................................259
BLOWER MOTOR RESISTOR BLOCK .....................................259
BLOWER MOTOR-FRONT - BLACK .......................................260
C205 - YELLOW (DASH SIDE) ...........................................260
C205 - YELLOW (MAIN BODY SIDE) ......................................260
CENTRAL TIMER MODULE C1 - PINK.....................................260
CENTRAL TIMER MODULE C2 - LT. GREEN ...............................261
CIRCULATION PUMP (CABIN HEATER MODULE) ...........................261
CIRCULATION PUMP (REST SYSTEM) ....................................261
CIRCULATION PUMP DIODE ............................................261
CLOCKSPRING C2 - YELLOW ...........................................262
CONTROLLER ANTILOCK BRAKE ........................................262
CYLINDER LOCK SWITCH-DRIVER.......................................263
DATA LINK CONNECTOR - BLACK........................................263
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-DRIVER C1 .................263
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-DRIVER C2 .................263
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-LEFT SLIDING C1 ...........263
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-LEFT SLIDING C2 ...........264
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-PASSENGER C1 ............264
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-PASSENGER C2 ............264
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-REAR C1...................264
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-REAR C2...................264
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-RIGHT SLIDING C1 ..........265
DOOR LOCK MOTOR/AJAR SWITCH ASSEMBLY-RIGHT SLIDING C2 ..........265
DOSING PUMP ........................................................265
ENGINE CONTROL MODULE C1 (EXCEPT OBD) - BLACK ...................265
ENGINE CONTROL MODULE C2 (EXCEPT OBD) - BLACK ...................266
ENGINE CONTROL MODULE C2 (OBD) ...................................267
ENGINE CONTROL MODULE C3 (EXCEPT OBD) - BLACK ...................268
EVAPORATOR TEMPERATURE SENSOR ..................................269
FUEL LEVEL SENSOR ..................................................269
FUSES (FUSE BLOCK NO. 1) ............................................271
FUSE BLOCK NO. 1 C1 .................................................271
FUSE BLOCK NO. 1 C2 .................................................271
FUSE BLOCK NO. 1 C3 - BLACK .........................................272
FUSE BLOCK NO. 1 C4 - BLACK .........................................272
FUSE BLOCK NO. 1 C5 - BLACK .........................................272
vi

TABLE OF CONTENTS - Continued
FUSES (FUSE BLOCK NO. 2) ............................................274
FUSES (FUSE BLOCK NO. 3) ............................................276
FUSES (FUSE/RELAY BLOCK) ...........................................278
HOOD AJAR SWITCH - BLACK...........................................278
HORN (VTSS) .........................................................278
IGNITION LOCK SWITCH - BLACK........................................278
INSTRUMENT CLUSTER C1 .............................................279
INSTRUMENT CLUSTER C2 - WHITE .....................................279
INTRUSION SENSOR NO. 1 - BLACK .....................................279
INTRUSION SENSOR NO. 2 - BLACK .....................................279
INTRUSION SENSOR NO. 3 - BLACK .....................................280
MASTER DOOR LOCK SWITCH ..........................................280
PANIC ALARM SWITCH - BLACK .........................................280
FUSES (PDC) .........................................................281
RADIO C1 - BLACK ....................................................282
RADIO C2 ............................................................282
RECIRCULATED AIR SOLENOID VALVE ...................................282
REFRIGERANT PRESSURE SENSOR .....................................282
A/C AUXILIARY FAN RELAY (RELAY BLOCK) ...............................284
CIRCULATION PUMP RELAY-CABIN HEATER MODULE (RELAY BLOCK) .......284
D+ RELAY NO. 2 (RELAY BLOCK) ........................................284
FAN STAGE 1 RELAY (RELAY BLOCK) ....................................284
OPTIONAL EQUIPMENT RELAY (RELAY BLOCK) ...........................284
REMOTE KEYLESS ENTRY ANTENNA ....................................284
SEAT BELT SWITCH ...................................................284
SEAT BELT TENSIONER-DRIVER - YELLOW ...............................285
SEAT BELT TENSIONER-PASSENGER - YELLOW ...........................285
SECURITY SYSTEM MODULE C1 - BROWN ...............................285
SECURITY SYSTEM MODULE C2 - LT. GREEN .............................286
SENTRY KEY REMOTE ENTRY MODULE (SKREEM) ........................286
SHIFTER ASSEMBLY - BLACK ...........................................286
SIREN - BLACK .......................................................286
STEERING ANGLE SENSOR ............................................287
TOWING/INTRUSION SENSOR ON/OFF SWITCH ...........................287
TRANSMISSION CONTROL MODULE C1 - BLACK ..........................287
TRANSMISSION CONTROL MODULE C2 - BLACK ..........................288
WATER CYCLE VALVE..................................................288
WINDOW DEFOGGER-LEFT REAR .......................................288
WINDOW DEFOGGER-RIGHT REAR ......................................288
10.0 SCHEMATIC DIAGRAMS................................................289
10.1 AIRBAG SYSTEM .................................................289
10.2 COMMUNICATION ................................................290
10.2.1 COMMUNICATION K-LINES ................................290
10.2.2 CAN BUS NETWORK......................................291
10.3 HEATING & A/C...................................................292
10.3.1 AUTOMATIC TEMPERATURE CONTROL (ATC) ................292
10.3.2 CABIN HEATER MODULE (CHM) ............................293
10.3.3 HEATER BOOSTER MODULE (HBM).........................294
10.4 INSTRUMENT CLUSTER ...........................................295
vii

TABLE OF CONTENTS - Continued
10.5 POWER DOOR LOCKS/RKE ........................................296
10.5.1 FRONT DOORS ..........................................296
10.5.2 SLIDING AND REAR DOORS ...............................297
10.5.3 SWITCH AND MISCELLANEOUS CIRCUITS ...................298
10.6 VEHICLE THEFT SECURITY SYSTEM................................299
10.7 RAIN SENSOR SYSTEM ...........................................300
11.0 CHARTS AND GRAPHS ................................................301
11.1 EVAP TEMP SENSOR RESISTANCE TO TEMPERATURE
SPECIFICATIONS .................................................301
11.2 AIR OUTLET TEMP SENSOR RESISTANCE TO TEMPERATURE
SPECIFICATIONS .................................................301
11.3 WIPER SWITCH/WASHER SWITCH VOLTAGE SIGNALS ................302
viii

1.0 INTRODUCTION
The pr ocedu r es con t a in ed in t h is m a n u a l in clu de
all th e specifica t ions, in str u ct ion s a n d gra ph ics
needed to diagnose Spr inter body syst em problem s.
The dia gn ost ics in t his m a n u a l ar e ba sed on t h e
failure con dition or sym pt om being pr esen t a t t h e
tim e of dia gnosis.
Plea se follow t he r ecom m en da tion s below when
choosin g you r dia gnostic pa t h .
1. First make sure the DRBIII"is comm u n icatin g
wit h th e appr opria t e modules; i.e., if t h e
DRBIII"displays a ‘‘No Response’’ or a ‘‘Bus !
Sign a ls Open’’con dit ion, you m u st dia gn ose t h a t
fir st .
2. Read DTC’s (diagn ost ic t r ou ble codes) wit h t h e
DRBIII".
3. If n o DTC’s a r e pr esent , identify t h e cust om er
compla in t .
4. Once t h e DTC or cu st om er com plain t is ident i-
fied, loca t e t h e m a t ch in g t est in t h e Table of
Cont ents an d begin t o diagnose th e symptom .
All com pon ent location views a r e in Sect ion 8.0.
All con nector pin out s ar e in Sect ion 9.0. All sch e-
ma t ics a r e in Section 10.0. All Ch a r t s a n d Gra ph s
ar e in Section 11.0.
An * pla ced befor e the sym pt om descript ion in di-
cat es a cust om er com plaint wit h ou t a DTC.
Wh en repair s a re r equir ed, refer t o t h e a ppr opr i-
at e ser vice infor m at ion for t h e pr oper r em oval a n d
repair pr ocedure.
Dia gn ostic pr ocedures ch a nge every yea r. New
dia gnostic systems m a y be a dded: ca r ryover sys-
tems m a y be en h a n ced. RE AD THIS MANUAL
BEF ORE TRYING TO DIAGNOSE A VE H ICLE
DIAGNOSTIC TROUBLE CODE. It is recom-
mended t h a t you r eview t he ent ir e m a n u a l t o be-
come fa m iliar with a ll th e n ew a n d ch an ged dia g-
nost ic procedur es.
This book r eflects m a ny suggest ed ch a n ges from
readers of past issues. After u sing t his book, if you
ha ve a n y com m ent s or suggest ions, please fill ou t
th e form in t h e back of th is book a n d ma il it back to
us.
1.1 SYSTEM COVERAGE
This dia gn ost ic procedur es ma n ua l cover s a ll
Spr in t er vehicles.
1.2 SIX-STEP TROUBLESHOOTING
PROCEDURE
Dia gn osis of t h e body syst em is done in six ba sic
steps:
•verifica t ion of com plain t
•verifica t ion of a n y r ela t ed symptom s
•sym pt om a n alysis
•pr oblem isola t ion
•repair of isola t ed problem
•verifica t ion of pr oper opera t ion
2.0 IDENTIFICATION OF
SYSTEM
The veh icle systems t h a t a r e pa r t of th e ‘‘body’’
system are:
•Air ba g
•Aut om at ic Tem perat u re Con t rol
•Comm u n ication
•Instrument Cluster
•Power Door Locks/RKE
•Veh icle Theft Securit y Syst em (VTSS)
•Wiper/Rain Sensor
3.0 SYSTEM DESCRIPTION AND
FUNCTIONAL OPERATION
The body system on th e Spr int er consist s of a
combin a t ion of m odu les t ha t com m u n ica t e wit h
each ot h er usin g t h e CAN Bus (cont r oller a r ea
network). Thr ou gh the CAN Bus, in form a t ion about
th e operat ion of veh icle com pon ent s a n d cir cu it s is
rela yed quickly to the a ppr opr iat e m odu les. Sin ce
th e CAN bu s n etwork is for in t ermodu le comm u n i-
cat ion on ly, th e DRBIII"u tilizes K-Lin es to est a b-
lish com m u n ica tion s with ea ch m odu le. It is im por-
ta n t t o n ote t h e CAN bu s cir cu it s a r e by no m ea n s
tied to the K-Lines. Th ey are com plet ely separ a t e
from each ot h er. F or additional infor m a t ion on t h e
CAN bu s and the K-Lines, refer t o the Commu n i-
cat ion sect ion of th is gen er a l inform a tion .
3.1 AIRBAG SYSTEM
The Sprin ter Air bag Syst em con t a in s t h e follow-
in g com pon ent s:
•Air ba g Cont r ol Modu le (ACM)
•Air ba g War nin g In dicat or (SRS)
•Driver Air bags
•Clock spr in g
•Pa ssen ger Air bag
•Driver Sea t Belt Ten sion er s
•Pa ssen ger Seat Belt Ten sion ers
The Air bag Cont r ol Module (ACM) h a s five m a jor
fun ct ion s: on board dia gnost ics, det ermin e th e se-
verit y of im pa ct s, squ ib deploym ent an d Accident
Respon se, K-Lin e comm u nica t ion s. The ACM is
1
GENERAL INFORMATION

secured t o t he floor under the Dr iver seat an d
receives power fr om th e Fuse Block No. 1. Wh en -
ever t h e ign it ion key is t ur n ed to th e r u n or st ar t
posit ion, th e ACM per for m s a system test. The ACM
can n ot be r epa ir ed or adju sted.
The m icropr ocessor in t h e ACM m on itor s t h e
in t erna l a n d extern a l a irbag system electrica l cir-
cuit s t o determin e t h e system r eadin ess. Wh en a
mon itor ed syst em is det er m in e t o be out of r a nge,
th e ACM will set bot h a ct ive a n d st or ed dia gn ostic
tr ou ble codes (DTC). The ACM also con t a in s an
ener gy-st or a ge ca pa cit or. This ca pacit or st ores
enou gh electr ical en ergy t o deploy t h e fr on t a ir ba g
compon en t s for t wo seconds followin g a ba t t er y
discon n ect or failu r e durin g an impact .
The Acceler om et er in th e ACM is u sed to sense
th e r at e of vehicle decelerat ion, provide verifica t ion
of t h e dir ection a n d sever it y of a n impa ct . Wh en th e
pr eprogr am m ed condit ions a r e met, the ACM sends
an electr ical sign al t o deploy th e a ppr opr ia te fron t
air bag syst em com pon ent s a nd a deployment n ot i-
fica t ion .
To provide a n a ccident r esponse n ot ifica t ion, the
ACM is h ar dwir ed t o t h e Cent r a l Timer modu le
(CTM) a n d E ngine Con t r ol Module (E CM). Wh en a
deploym en t occu rs t h e ACM provides a 50ms 10.0
volt pu lse to t h e CTM a nd E CM. When t h e Acciden t
Repor t n ot ifica t ion sign a l is r eceived t he CTM un-
locks th e door lock s a n d t h e E CM st a lls t he en gin e.
The Acciden t sign a l will set a DTC in t h e CTM a n d
th e door locks will n ot work un t il the DTC h a s been
era sed. The E CM will set a DTC if th e Accident
Repor t circuit is short ed to bat t er y volta ge. The
ACM saves th e deployment r ecor d a nd a ft er t h r ee
deploym en t s th e ACM must be repla ced. The
DRBIII"can be u sed to test t h e Accident Repor t
Not ifica t ion fea t ur e: select t h e SYSTE M TEST from
th e ACM m a in m en u . Then select the An alog Cr a sh
Output System Test.
The ACM is h a r dwir ed to th e Inst r u m en t Clu st er
(MIC) t o con t r ol Wa r n in g Indica t or (SRS indicator ).
Wh en DTCs becomes act ivate, th e ACM illumin at es
th e War n ing In dica tor by pulling t h e indicator
cir cu it low. The SRS in dica t or is th e only poin t a t
which the cust om er ca n observe sym pt om s of a
syst em m a lfu n ct ion .
As pa r t of t he system t est t h e ACM illu m in a t es
th e War n in g Indica t or on for 4.0 secon d bu lb test .
After t he la mp check, if th e in dica tor tu r ns off, it
mean s t h a t t h e ACM ha s ch ecked t h e syst em a n d
foun d it t o be free of discernible m a lfu nct ions.
NON-CRITICAL DTCs
If t h e la mp com es on a n d st a ys on for a per iod
lon ger t h a n 4.0 seconds (about 10.0 secon ds) is
usu a lly a stor ed DTC (in term it t ent pr oblem) in t h e
system.
CRITICAL DTCs
DTCs th a t cou ld lea d t o a con dit ion wh er e the
sa fety devises ma y n ot deploy or incorr ectly deploy.
In t h e even t of su ch a DTC, th e sa fety of t h e vehicle
occupa n t s ca n n o lon ger be gu a r a n t eed. If t h e lamp
rema in s on , th ere cou ld be a n act ive DTC in t h e
syst em . Som e DTCs, In tern a l Modu le a n d squib
DTCs, will keep t h e in dicat or illumin at ed even if
th e codes a r e n o longer a ct ive.
ACM NOT CONFIGURED FOR PASSENGER
AIRBAG AND TENSIONER
If a ft er repla cing t h e ACM t h e Air ba g Wa r n in g
In dica t or flash es cont in u ou sly t h e ACM m u st be
configur ed for t h e P a ssenger Air ba g an d Ten sioner.
Select Miscella n eous fr om t h e ACM m a in menu a n d
configur e t h e P a ssen ger Air bag Ten sion er squibs.
WARNING: THE AIRBAG SYSTEM IS A
SENSITIVE, COMPLEX ELECTROMECHANICAL
UNIT. BEFORE ATTEMPTING TO DIAGNOSE OR
SERVICE ANY AIRBAG SYSTEM OR RELATED
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENTS YOU MUST
FIRST DISCONNECT AND ISOLATE THE
BATTERY NEGATIVE (GROUND) CABLE. WAIT
TWO MINUTES FOR THE SYSTEM CAPACITOR
TO DISCHARGE BEFORE FURTHER SYSTEM
SERVICE. THIS IS THE ONLY SURE WAY TO
DISABLE THE AIRBAG SYSTEM. FAILURE TO
DO THIS COULD RESULT IN ACCIDENTAL
AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
WARNING: TO AVOID PERSONAL INJURY OR
DEATH, NEVER STRIKE OR KICK THE
AIRBAG CONTROL MODULE, AS IT CAN
DAMAGE THE IMPACT SENSOR OR AFFECT
ITS CALIBRATION.
WARNING: IF AN AIRBAG CONTROL
MODULE IS ACCIDENTALLY DROPPED
DURING SERVICE, THE MODULE MUST BE
SCRAPPED AND REPLACED WITH A NEW
UNIT. FAILURE TO TAKE THE PROPER
PRECAUTIONS COULD RESULT IN
ACCIDENTAL AIRBAG DEPLOYMENT AND
PERSONAL INJURY OR DEATH.
3.1.1 DRIVER AIRBAG
The a ir bag pr ot ective tr im cover is th e m ost
visible part of t he dr iver side a irbag syst em. The
air bag is m oun t ed dir ectly t o t h e st eerin g wheel.
Locat ed u n der t h e t r im cover a r e th e a ir ba g cush ion
an d t h e a ir ba g cu sh ion suppor t in g com pon ent s.
2
GENERAL INFORMATION

Wh en su pplied wit h th e pr oper elect r ica l sign a l, t h e
in flator disch a r ged t h e gas direct ly in t o t h e cu sh -
ion . Th e a irbag ca n n ot be r epair ed, a n d m u st be
repla ced if deployed or in a n y way da m aged.
WARNING: THE DRIVER AIRBAG MODULE
CONTAINS ARGON GAS PRESSURIZED TO
OVER 17236.89 Kpa (2500 PSI). DO NOT
ATTEMPT TO DISMANTLE AN AIRBAG
MODULE OR TAMPER WITH ITS INFLATOR.
DO NOT PUNCTURE, INCINERATE, OR
BRING INTO CONTACT WITH ELECTRICITY.
DO NOT STORE AT TEMPERATURE
EXCEEDING 93°C (200°F). REPLACE AIRBAG
SYSTEM COMPONENTS ONLY WITH PARTS
SPECIFIED IN THE CHRYSLER MOPAR
PARTS CATALOG. SUBSTITUTE PARTS MAY
APPEAR INTER-CHANGEABLE, BUT
INTERNAL DIFFERENCES MAY RESULT IN
INFERIOR OCCUPANT PROTECTION. THE
FASTENERS, SCREWS, AND BOLTS
ORIGINALLY USED FOR THE AIRBAG
SYSTEM COMPONENTS HAVE SPECIAL
COATINGS AND ARE SPECIFICALLY
DESIGNED FOR THE AIRBAG SYSTEM. THEY
MUST NEVER BE REPLACED WITH ANY
SUBSTITUTES. ANY TIME A NEW FASTENER
IS NEEDED, REPLACE IT WITH THE
CORRECT FASTENERS PROVIDED IN THE
SERVICE PACKAGE OR SPECIFIED IN THE
MOPAR PARTS CATALOG. FAILURE TO
TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG
DEPLOYMENT AND PERSONAL INJURY OR
DEATH.
3.1.2 CLOCKSPRING
The clockspr ing is m ou n t ed on t h e steer in g col-
um n un der t h e st eer in g wh eel. This a ssembly con -
sist s of a pla stic h ou sin g which con t a in s a fla t ,
ribbon-like, elect r ica lly con du ct ive ta pe t h a t win ds
an d u n winds with t h e st eerin g wheel r ot a t ion . Th e
clockspr ing is u sed to m ain t a in a cont inu ou s elec-
tr ical cir cu it between the in st r u m ent pa n el wir ing
an d t h e dr iver air bag a n d t he h or n. Th e clockspr ing
mu st be pr operly cen t er ed when it is r ein st a lled on
th e st eer in g colum n followin g a n y ser vice pr oce-
du r e, or it could be dam a ged. Th e clockspr ing ca n -
not be r epa ired a n d it m u st be r epla ced.
3.1.3 PASSENGER AIRBAG
The P a ssenger Air ba g is opt ion al equ ipm ent .
Wh en su pplied with t h e pr oper elect r ica l sign a l th e
pa ssenger a irba g in fla t or discha r ges t h e ga s di-
rectly in t o t h e cu sh ion. Th e a irbag m odu le cann ot
be repaired, an d m ust be repla ced if deployed or in
any way damaged.
WARNING: THE PASSENGER AIRBAG
MODULE CONTAINS ARGON GAS
PRESSURIZED TO 17236.89 Kpa (2500 PSI).
DO NOT ATTEMPT TO DISMANTLE AN
AIRBAG MODULE OR TAMPER WITH ITS
INFLATOR. DO NOT PUNCTURE,
INCINERATE, OR BRING INTO CONTACT
WITH ELECTRICITY. DO NOT STORE AT
TEMPERATURE EXCEEDING 93°C (200°F).
REPLACE AIRBAG SYSTEM COMPONENTS
ONLY WITH PARTS SPECIFIED IN THE
MOPAR PARTS CATALOG. SUBSTITUTE
PARTS MAY APPEAR INTER-CHANGEABLE,
BUT INTERNAL DIFFERENCES MAY RESULT
IN INFERIOR OCCUPANT PROTECTION. THE
FASTENERS, SCREWS, AND BOLTS
ORIGINALLY USED FOR THE AIRBAG
SYSTEM COMPONENTS HAVE SPECIAL
COATINGS AND ARE SPECIFICALLY
DESIGNED FOR THE AIRBAG SYSTEM. THEY
MUST NEVER BE REPLACED WITH ANY
SUBSTITUTES. ANY TIME A NEW FASTENER
IS NEEDED, REPLACE IT WITH THE
CORRECT FASTENERS PROVIDED IN THE
SERVICE PACKAGE OR SPECIFIED IN THE
MOPAR PARTS CATALOG. FAILURE TO
TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG
DEPLOYMENT AND PERSONAL INJURY OR
DEATH.
3.1.4 SEAT BELT TENSIONERS
Fr on t seat belt systems in cor por at e a Driver a n d
opt ion a l Pa ssen ger Seat Belt Ten sion er Ret r a ct or s.
At th e on set of a n im pa ct event each tension er u ses
a pyr ot echnic device, which is tr igger ed simu lta -
neously wit h t h e fr ont air bags, to r a pidly r etra ct
th e sea t belt s. Wit h t h e sla ck r emoved, th e occu -
pa n t ’s forwar d mot ion in a n im pa ct will be reduced
as will the likelih ood of cont act ing interior compo-
nents. Aft er a n im pa ct t ha t deploys t h e a irba g, th e
seat belt t ension er a ssem bly m u st be r epla ced. The
ACM modu le m onit ors th e Sea t Belt Ten sioner s
cir cu it r esista n ce a n d r eports a ct ive a n d stor ed
DTCs if a ny pr oblem is foun d. F ollow a ll of t h e
sa fety pr ocedu r es wh en servicing t ension er.
3.1.5 SPECIAL TOOLS
Air ba g loa d t ools 8310 an d 8443 ar e used in som e
air bag diagn ost ic t est . The loa d t ools con ta in fixed
resist ive loa ds, ju m pers a n d a da pt ers. The fixed
3
GENERAL INFORMATION

loa ds a r e conn ected to ca bles and m ou nt ed in a
st or a ge ca se. The ca bles ca n be dir ectly connected to
som e a irba g syst em conn ector s. J u m per s ar e u sed
to con ver t t h e loa d t ool cable con nector s to t h e oth er
air bag syst em con n ect or s. Th e a dapt ers a re con -
nected t o t h e m odu le h a r n ess con n ect or t o open
sh or t in g clips and pr ot ect t h e conn ector termin a l
du r ing testin g. Wh en u sing t h e loa d t ool follow a ll of
th e sa fety procedu r es in t he service in form a tion for
discon n ectin g a ir ba g system com pon ent s. In spect
th e wir ing, conn ector and t er m in a ls for dama ge or
misa lign ment . Su bstit u t e t he a irba g load t ool in
pla ce of a Dr iver or P a ssenger Air bag, seat belt
tension er, clock spr in g (u se a ju m per if needed).
Then follow all of th e safety procedur es in th e
service in form a t ion for con n ect in g a irba g system
compon en t s. Rea d t h e m odu le act ive DTCs. If t h e
modu le report s NO ACTIVE DTCs t h e defective
compon en t s h a s been r emoved from t h e syst em a n d
sh ou ld be r epla ced. If t h e DTC is still active, con -
tin ue this pr ocess unt il a ll com ponents in the cir cu it
ha ve been t ested. Then disconnect th e m odu le con -
nector a n d conn ect the m a t ch in g a da pt er to t he
modu le con n ector. Wit h a ll air ba gs disconnected
an d th e a da pt er insta lled t h e squ ib wir in g can be
tested for open a n d shor t ed con ditions.
3.1.6 DIAGNOSTIC TROUBLE CODES
Air ba g diagn ost ic t r ou ble codes con sist of act ive
an d st or ed codes. If m or e t h a n on e code exist s,
dia gnostic pr ior ity sh ou ld be given t o t h e a ct ive
codes. E a ch dia gnostic t r ou ble code is dia gn osed by
followin g a specific testin g pr ocedure. Th e diagnos-
tic t est pr ocedu r es con t ain step-by-st ep inst r uct ions
for det erm ining th e ca u se of t h e t r ou ble codes. It is
not n ecessary t o perfor m a ll of th e t ests in t his book
to dia gn ose a n in dividu a l code. Always begin by
readin g t h e dia gnost ic tr ou ble codes wit h t h e
DRBIII". This will direct you to t he specific t est(s)
th a t mu st be per for m ed. In cert a in test procedur es
wit h in t h is m a n u a l, dia gn ost ic t r ou ble codes a r e
used as a dia gn ostic t ool.
3.1.6.1 ACTIVE CODES
If t h e la m p r emain s on, th ere could be a n act ive
DTC in th e system. Th e code becom es a ct ive a s soon
as t h e ma lfu nct ion is det ect ed or k ey-on , wh ich ever
occur s fir st . An a ct ive tr ou ble code indica t es a n
on-going malfu n ct ion. Th is m eans t h at t h e defect is
cur r ent ly t here every t ime t h e air bag cont r ol m od-
ule ch ecks t h a t cir cu it or com ponent . Som e DTCs,
In t er n a l Module a n d squib DTCs, will keep t h e
in dicator illumin at ed even if t h ey ar e n o longer
act ive. If th e lam p is on a n d n o act ive codes are
pr esent , cycling t h e ign it ion switch off a nd t h en on
will r efresh t h e la m p sta t e. It is im possible t o er a se
an a ct ive code.
3.1. 6.2 STORED CODES
Air ba g codes a r e a u t om a t ica lly st or ed in t h e
ACM’s m emor y as soon a s t h e ma lfunct ion is de-
tected. A stor ed code in dica t es there wa s a n act ive
code pr esent a t some t ime. St or ed diagn ost ic t r ou -
ble code will rema in stor ed u n t il era sed by th e DRB.
If a m alfu n ct ion is n ot a ct ive wh ile per for min g a
dia gnostic t est pr ocedure, t h e a ct ive code dia gn ost ic
test will n ot loca t e th e sou r ce of t he pr oblem. In t h is
case, t h e st or ed code ca n in dicat e a n area t o inspect .
Mainta in a safe dist a n ce fr om a ll a ir ba gs while
perform in g t h e followin g inspection . If n o obviou s
pr oblems ar e foun d, erase stor ed codes, a n d wit h
th e ign it ion on wiggle t h e wir e h a r n ess a n d conn ec-
tor s, r ot a t e t h e st eering wh eel fr om stop t o st op.
Rech eck for codes periodica lly a s you work t hr ou gh
th e system. Th is pr ocedu r e m a y u n cover a m a lfu n c-
tion t ha t is difficu lt t o loca te.
3.2 COMMUNICATION
3.2.1 COMMUNICATION K-LINES
The K-Lines a r e a group of cir cu its th a t conn ect
each con tr ol modu le to t h e Dat a Lin k Conn ector
(DLC). E a ch con t rol module is con n ect ed t o the DLC
wit h a single K-Line. The DRBIII"u ses t h e K-Lin e
to com m u n icate wit h each con t r ol modu le. Wit h th e
use of t h e K-Lines t h e DRBIII"is a ble t o r ead each
cont r ol m odu les DTCs, sensor displa ys, I/Os etc. If
DRBIII"comm u n ica tion s wit h a par t icula r con tr ol
modu le is lost, one of th e possible cau ses cou ld be a
fau lt in t h e m odu le’s K-Line.
NOTE: It is important to note the DRBIII!
uses the K-Lines for diagnostic and
monitoring functions and is no way
connected to the CAN data bus network.
The followin g modules t ha t u se t h e K-lin e on t h is
vehicle a r e:
•Air ba g Cont r ol Modu le (ACM)
•Aut om at ic Tem perat u re Contr ol (ATC)
•Cabin H eater Modu le (CHM)
•Cen t r a l Tim er Module (CTM)
•Cont r oller An tilock Br a ke (CAB)
•En gin e Contr ol Modu le (E CM)
•Heat er Booster Modu le (H BM)
•In st r u m en t Clu st er (IC)
•Sh ift er Assembly (SA)
•Securit y Syst em Module (SSM)
•Sentr y Key Remot e E n tr y Modu le (SKREEM)
•Tra n sm ission Cont r ol Modu le (TCM)
4
GENERAL INFORMATION

3.2. 2 CAN BUS
The CAN bus (cont r oller a r ea n etwork) is a da t a
bus syst em specifically design for int er modu le
comm u nica t ion on th is veh icle. The CAN bus con -
sist s of a specia l twist ed two-cor e cable. Cont r ol
modu les a r e connected to t h is #twisted pair#.The
CAN bus in cor pora t es t wo termin at ing resist or s.
One t ermin a t or is built into t h e E n gine Contr ol
Module (E CM) and t h e ot h er is built in t o t h e Sent r y
Key Remot e E n t r y Module (SKREEM). Ea ch r esis-
tor h a s a va lue of 120 ohms. Th e r esist or condit ion
can be con fir m ed by disconnectin g t he contr ol m od-
ule a n d m ea su r in g t h e r esist a n ce va lu e a t t h e
appr opria t e con t r ol module pins. This m easur e-
ment sh ould r ead 120 ohm s. Th e t wo CAN cir cu it s,
CAN C Bu s (+) a n d CAN C Bu s (-), a r e bridged by
th ese t wo term in at ing r esist or s when a ll con t r ol
modu les a re con n ected t o t h e bus. Th ese two r esis-
tor s a re connected to t h e CAN bus n etwork in
parallel. The measurement between the two
twist ed CAN cir cu it s, wit h both t h e E CM an d
SKRE E M con n ect ed, sh ou ld m easu r e a valu e of 60
ohm s.
The CAN bus is bi-dir ection a l. This mean s t h a t
each con n ected con t r ol module can send a n d r eceive
in for ma t ion . Tra n smission of da t a t a kes pla ce re-
du n da n t ly via both circu it s. Th e da t a bus levels a r e
mir ror ed, meanin g th a t if t h e bin a r y level on on e
cir cu it is 0, the ot h er circu it tr a n smit s bina r y level
1 an d vice ver sa. Th e t wo lin e concept is used for
two r ea son s: for fa u lt ident ifica t ion an d a s a safety
concept.
If a volt a ge pea k occur s on ju st on e cir cu it , th e
receivers ca n iden tify th is a s a fa ult a n d ign or e th e
volt a ge pea k. If a sh or t cir cu it or in terru pt ion
occur s on one of t h e t wo CAN cir cuit s, a softwar e-
ha r dware lin ked sa fety concept a llows swit ch in g t o
a sin gle-line opera t ion. Th e defect ive CAN circu it is
sh u t down. A specific data protocol con tr ols how an d
when t h e part icipant s ca n send an d r eceive.
NOTE: It is important to note the CAN Bus
circuits are used for inter-module
communication only, and is no way
connected to the K-Lines.
The followin g modules t ha t u se t h e CAN Bu s on
th is vehicle ar e:
•Aut om at ic Tem perat u re Contr ol (ATC)
•Cont r oller An tilock Br a ke (CAB)
•En gin e Contr ol Modu le (E CM)
•In st r u m en t Clu st er (IC)
•Sentr y Key Remot e E n tr y Modu le (SKREEM)
•Sh ift er Assembly (SA)
•Tra n sm ission Cont r ol Modu le (TCM)
3.3 HEATING & A/C SYSTEM
3.3.1 AUTOMATIC TEMPERATURE
CONTROL (ATC)
3.3. 1.1 SYSTEM CONTROLS
The ATC Modu le:
•is fully addr essa ble with t h e DRBIII".
!The DRBIII"com m un icat es wit h t h e ATC
Module t h r ou gh th e Dia gnostic Lin k Conn ector
(DLC) via a K-Lin e.
•comm u nica t es wit h ot h er modules over t h e Con-
tr oller Area N etwork (CAN) C Bus.
•cont r ols A/C clu tch opera t ion.
•cont r ols EBL oper a t ion .
•cont r ols water cycle valve operat ion .
!The wa t er cycle va lve is a n or m a lly open va lve,
mean in g t h a t it allows fu ll engin e coola n t flow
th r ough t he h eat er cor e when no power is
delivered t o th e va lve. The ATC cont r ols t h e
va lve wit h a pu lse width signa l. Th e lower t h e
percent a ge of t h e pulse widt h sign al the m or e
th e valve is open.
•cont r ols Residu a l Heat Ut ilization (REST) fu n c-
tion .
•cont r ols blower motor opera t ion, pr ovidin g four
blower speeds (Low, M1, M2, & High ).
•cont r ols r ecir cu la tion a ir solen oid va lve.
•cont r ols th e m ode door via ca bles.
•cont r ols t h e m a in power su pply to t h e H ea t er
Booster (if equipped).
•uses air inlet t emper a t ur e sensor, a ir ou t let t em-
perat u r e sensor, a n d eva por a t or t emperat u re
sensor in pu t , a s well a s da t a fr om ot h er modu les
to m a in ta in occupan t com for t levels.
3.3.1.2 SYSTEM DIAGNOSTICS
Fa u lt detection is thr ou gh act ive a n d st or ed Dia g-
nost ic Trou ble Codes (DTCs)
•DTCs are displayed by the DRBIII".
•Active DTCs ar e t hose which cu r r en t ly exist in
th e system. Th e con dition ca usin g th e fa u lt m u st
be r epa ir ed in or der to clea r t his type of DTC.
•St or ed DTCs a r e t h ose which occurr ed in th e
syst em sin ce t h e ATC Modu le r eceived t h e la st
#clear dia gn ost ic info#message.
Testing Preparation & Diagnostics
Set t h e n ecessa r y system funct ions a ccor dingly so
th a t a ll of th e followin g prerequ isit es ar e m et pr ior
to perfor m ing dia gnostic t ests on t h e ATC system:
5
GENERAL INFORMATION

1. Con n ect t h e DRBIII"to the DLC.
2. P la ce t he sh ift lever in pa r k.
3. Start the engine.
4. Set t h e blower to high speed.
5. Set t h e t emperat u r e selector t o fu ll cold.
6. P ress a ir condit ioning switch on .
7. Wit h t h e DRBIII"in Sen sor s, ver ify t h a t th e:
A. am bient t emperat u re is a bove 59F (15C).
B. refriger a nt pressure is bet ween 29 a n d 348
PSI (2 a n d 24 ba r ).
C. evapor a t or temperat u re is above 36.5F
(2.5C).
D. coolan t t empera t ur e is above 158F (70C).
Wh en a ll of t h e prerequ isites h a ve been m et, use
the DRBIII"to r ecor d a nd erase all stor ed ATC
DTCs, a n d then select System Test s, a n d ru n t h e
ATC F u nct ion Test. Wh en com plet e, ch eck t o see if
an y a ct ive DTCs a r e pr esen t . If so, refer to th e
sym pt om list in t h e Heatin g & A/C ca t egor y for t h e
dia gnostic pr ocedure(s). If th ere a r e n o DTCs
pr esent , yet t h e perfor m an ce seems less t h a n ideal,
use the DRBIII"to look at a ll sen sor va lues a n d th e
st a t u s of t h e va r ious in pu ts a n d ou t pu t s t o see if
th ere is a deficien cy det ected t h at ha s n ot fully shut
down t h e system. For a ddit ion al infor m a t ion , refer
to Sensor Valu es a n d Inpu t /Ou t pu t St at u s un der
Dia gn ostic Tips in th is sect ion a n d t o Section 11.0
for eva por a tor t empera t u r e sensor an d air outlet
temperat u re sensor resist a nce t o t empera t u r e spec-
ifica t ion s ch a r t s. Also, con fir m t h a t th e wat er cycle
va lve is fu n ct ion in g. Remember t h a t t h e valve is
nor m ally open . Th e pu lse widt h sign al will offer
in sigh t int o t h e va lve’s oper a t ion. The lower t h e
percent a ge n u m ber, th e m ore open t h e valve be-
comes. Con firm t h a t t he va lve is r espondin g to th e
sign a l fr om th e ATC. If fun ct ionin g cor r ectly, verify
mode a n d blen d door operat ion. If oka y, the diagno-
sis th en becom es pu r ely r efrigera n t system rela t ed.
Att a ch th e a ppr opr ia t e ga u ges a nd dia gn ose t h e
refriger a tion system . Refer t o th e Ser vice Inform a -
tion for r efrigera n t syst em dia gn ostic procedures.
DIAGNOSTIC TIPS
SENSOR VALUES
Ambient Air Temperature
The Inst r um ent Clu st er t r an sm it s Am bient Air
Temperat u r e Sensor da t a . In th e event of a CAN
Bus com m u n ica t ion failure, t h e la st st or ed valu e is
displayed as a substitute value.
Interior Temperature
The n or m a l ran ge for t h e In t er ior Tem per a t u r e
Sensor is fr om 32°F t o 104°F. An impla u sible t em-
perat u r e va lu e indica t es t h a t t h e In t erior Temper-
at u re Sensor is ba d. Th e r epair in th is ca se would be
to r eplace t h e ATC Modu le since t h e sensor is
in t egr a l t o th e m odule.
Evaporator Temperature
The n or m a l ran ge for t h e E va pora t or Temperat u re
Sensor is fr om 14°F t o 104°F. A su bstit u t e value of
14°F wit h n o u pda t es in dicat es a n E vapora t or Tem -
perat u r e Sensor cir cu it fa ilur e.
Air Outlet Temperature
The norm a l r an ge for t h e Air Ou tlet Temperat u re
Sensor is fr om 32°F t o 203°F. A su bstit u t e value of
111.1°F in dicates an Air Out let Tempera t u r e Sensor
cir cu it fa ilu r e.
Coolant Temperature
The E n gin e Cont r ol Module t r a n smit s Coolan t
Temperat u r e Sen sor da t e. In th e event of a CAN
Bus com m u n ica tion fa ilur e, 257°F is displa yed a s a
substitute value.
Interior Temperature Controller
The n or m a l ran ge for t h e Blend con t r ol is from 62°F
to 144°F. Th is va lue r epresen ts t h e t empera t u r e set
by the opera t or. An impla u sible t em pera t ur e valu e
or a temperat u re va lu e t h a t fa ils to ch a nge wh en
rot a tin g t h e Blen d con t rol in dica tes t h a t t h e Blend
cont r ol is ba d. Th e r epair in th is ca se would be to
repla ce t h e ATC Modu le sin ce t h e Blen d cont r ol
in t egr a l t o th e m odule.
Refrigerant Pressure
The n or m a l ran ge for t h e Refriger a n t Pr essur e
Sensor is fr om 29 PSI to 406 PSI. A su bstit u te va lu e
of 413 PSI indicates a Refrigera n t P r essu r e Sensor
cir cu it fa ilu r e. In a ddition , t h e n or m a l r a nge for
Pr essu r e Sensor volt a ge is 0 volt s t o 5 volts. A valu e
of 0.9 volt s indica t es a n open volt a ge su pply cir cu it ,
while a value of -999 indica t es a n open in a ll th r ee
sensor cir cu it s.
Wa t e r C y c l e Va l v e
The n or m a l ran ge of t h e Wat er Cycle Va lve is fr om
0% to 100%. Th e va lue indica t es th e ext ent to which
th e valve is closed. A va lu e of 100% in dicates t h a t
th e valve is fully closed.
Intense Inst Light
The Instrument Cluster transmits this data. The
nor m al r a nge for light in g intensit y is fr om 0% t o
100%. Th e va lu e in dicates t h e ext ent to which th e
illumin a t ion ha s dim m ed. A value of 0% in dicat es
bright wh ile a va lu e >0% in dicates dim m in g. In t h e
even t of a CAN Bu s comm u n ica t ion failu r e, 0% is
displayed as a substitute value.
INPUT/OUTPUT STATUS
Compressor Clutch
The ATC Modu le tra n smit s t h is dat a . A st at u s of
#ON#in dica tes tha t th e compr essor is oper a t ional. A
st a t u s of #OFF#in dicates the compressor is n ot
operat ion a l.
6
GENERAL INFORMATION

Compres SO Accel (Compressor Shut Off - Due
To Ac c e l e r a t i o n )
The E n gin e Cont r ol Module t r a n smit s t h is da t a . A
st a t u s of #YE S#in dicates t h at t h e com pr essor shut
off beca u se of an a ccelera t ion r equest. A stat u s of
#NO#in dica t es tha t th er e is n o a ccelerat ion r equest.
If sh u t off due to a n acceler a tion requ est, the
compr ess will switch on aga in a ft er 20 seconds. In
addition, t he origin a l a cceler a t ion r equ est ca n n o
lon ger exist for t h e E CM t o acknowledge a su bse-
quen t r equ est . In t h e event of a CAN Bu s commu -
nica t ion fa ilur e, #NO#is displayed as a substitute
value.
Com p re s S O W/E-Off (Co m p re ss o r S h u t Off -
Due to Emergency Off)
The E n gin e Cont r ol Module t r a n smit s t h is da t a . A
st a t u s of #YE S#in dicates t h at t h e com pr essor shut
off beca u se of an emergen cy off r equest. A sta t u s of
#NO#in dica t es t h a t th er e is no emergency off re-
quest . In t h e even t of a CAN Bu s comm un ication
failure, th e la st st or ed va lu e is displa yed a s a
substitute value.
Auxiliary Fan
The ATC Modu le tra n smit s t h is dat a . A st at u s of
#ON#in dica tes tha t th e a u xilia r y fan is opera t ion a l.
A st a t u s of #OFF#indica t es t h a t t h e a u xilia r y fa n is
not opera t iona l. The Au xiliar y F a n n or ma lly oper-
at es when r efrigera n t h ea d pr essure exceeds 290
PSI a n d coola n t t em per a t u r e exceeds 221°F. In t h e
even t of a CAN Bus com m u n icat ion fa ilur e, 257°F is
displayed for coola nt t em pera t ur e (in Sen sor s) a n d
th e Auxiliar y F an will r un con t in u ou sly.
Light PB CTRL Module
This inpu t displays a st a t u s of #Bright#for posit ive
dim m er switch opera t ion a n d #Dimmed#for n ega -
tive dim m er switch opera t ion. In t h e event of a CAN
Bus com m u n ication fa ilu r e, #Bright#is displayed.
3.3.2 CABIN HEATER MODULE (CHM) &
HEATER BOOSTER MODULE (HBM)
3.3.2.1 SYSTEM DESCRIPTION
WARNING: NEVER OPERATE THE HEATER
IN AN ENCLOSED AREA THAT DOES NOT
HAVE EXHAUST VENTILATION FACILITIES.
ALWAYS VENT THE HEATER’S EXHAUST
WHEN OPERATING THE HEATER. REFER TO
$VENTING THE HEATER’S EXHAUST$
BELOW FOR PROPER EXHAUST VENTING
INSTRUCTIONS. FAILURE TO FOLLOW
THESE INSTRUCTIONS CAN RESULT IN
PERSONAL INJURY OR DEATH.
WARNING: ALLOW THE HEATER ASSEMBLY TO
COOL BEFORE PERFORMING A COMPONENT
INSPECTION/REPAIR/REPLACEMENT. FAILURE
TO FOLLOW THESE INSTRUCTIONS CAN
RESULT IN PERSONAL INJURY OR DEATH.
WARNING: ALWAYS DISCONNECT THE
VEHICLE’S BATTERY PRIOR TO
PERFORMING ANY TYPE OF WORK ON THE
HEATER ASSEMBLY. FAILURE TO FOLLOW
THESE INSTRUCTIONS CAN RESULT IN
PERSONAL INJURY OR DEATH.
WARNING: NEVER ATTEMPT TO REPAIR THE
HEATER ASSEMBLY OR ANY OF ITS
INTERNAL COMPONENTS. ALWAYS
PERFORM HEATER COMPONENT
REPLACEMENT IN ACCORDANCE WITH THE
SERVICE INFORMATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS CAN
RESULT IN PERSONAL INJURY OR DEATH.
CAUTION: Always Perform The Heater
Pre-Test (In The Diagnostic Procedures) Prior
To Performing Any Other Test On The Heater
For The Test Result To Be Valid.
NOTE: Do not disconnect the vehicle’s
battery or the heater’s main power-supply
while the heater is in operation or in
run-down mode. Failure to follow these
instructions may result in excess emissions
from the heater.
NOTE: Failure to prime the Dosing Pump
after draining the fuel line will prevent heater
activation during the first attempt to start the
unit. This may also set a Diagnostic Trouble
Code (DTC) in the control unit’s memory. Do
not perform the Dosing Pump Priming
Procedure if an attempt was made to start the
heater without priming the Dosing Pump
first. This will put excess fuel in the heater
module and cause smoke to emit from the
heater’s exhaust pipe when heater activation
occurs.
NOTE: Waxed fuel can obstruct the fuel line
and reduce flow. Check for the appropriate
winter grade fuel and replace as necessary.
The Cabin H eater Assembly a n d H ea t er Booster
Assembly a r e su pplement a l t ype h ea t er s design ed
to pr e-heat t h e engine’s coolan t in or der to su pply
th e veh icle’s occu pa n t s wit h h eat prior t o t h e engin e
7
GENERAL INFORMATION

reach in g operat ing t emperat u r e. Th e h eat er’s con-
tr ol un it con t r ols a n d m on itors com bust ion oper a -
tion t hr ou gh va riou s in pu t s a nd ou t put s t ha t a re
cont a in ed inside t h e h eat er a ssem bly. Th e su pple-
menta l hea t er con n ects t o t h e vehicle’s heater h oses
an d u ses a sepa r a t e fuel supply lin e a n d fu el pump
th a t con n ect s t o t h e veh icle’s fu el tan k. Unlike t h e
Heat er Booster, th e Ca bin H eat er Assembly h a s a n
in t egr a l coolant pu m p which allows heat er opera -
tion wit h ou t t h e veh icle’s en gin e r u n n ing. In a ddi-
tion , a progr a mm a ble t im er modu le ca n also be
added to this system. Neither the Cabin Heater
Assembly n or th e Hea t er Booster Assembly ar e
conn ected to t h e CAN Bus. Commu n ication be-
tween t h e h ea t er ’s con t r ol un it a n d t h e DRBIII"
occur s t h rou gh t h e Dia gn ost ic Lin k Connector
(DLC) via a K-Lin e.
3.3.2.2 VENTING THE HEATER’S EXHAUST
WARNING: NEVER OPERATE THE HEATER
IN AN ENCLOSED AREA THAT DOES NOT
HAVE EXHAUST VENTILATION FACILITIES.
ALWAYS VENT THE HEATER’S EXHAUST
WHEN OPERATING THE HEATER. FAILURE
TO FOLLOW THESE INSTRUCTIONS CAN
RESULT IN PERSONAL INJURY OR DEATH.
WARNING:
ALLOW THE HEATER ASSEMBLY TO
COOL BEFORE PERFORMING A COMPONENT
INSPECTION/REPAIR/REPLACEMENT. FAILURE
TO FOLLOW THESE INSTRUCTIONS CAN
RESULT IN PERSONAL INJURY OR DEATH.
CAUTION: When using a powered exhaust
ventilation system, do not attach the exhaust
ventilation hose directly to the heater’s
exhaust pipe. Too much suction can prevent
heater operation.
Wh en u sing a power ed exha u st vent ila t ion sys-
tem, affix t h e ven t ila t ion hose t o t h e h eat er ’s ex-
ha u st pipe or t o t h e vehicle in su ch a ma n or t h a t t h e
end of the ven t ilat ion h ose r em a in s a ppr oxim a t ely
th r ee in ch es a wa y from t h e end of t h e heat er’s
exhaust pipe.
Wh en u sing a n on -powered exh a ust ven t ilat ion
syst em , a ffix th e ven tilation hose dir ect ly t o th e
heater’s exhaust pipe.
3.3.2.3 SYSTEM DIAGNOSTICS
CAUTION: Always Perform The Heater
Pre-Test (In The Diagnostic Procedures) Prior
To Performing Any Other Test For The Test
Result To Be Valid.
Fa u lt detection is th r ou gh stored Dia gn ost ic
Trou ble Codes (DTCs). DTCs ar e displayed by t h e
DRBIII". Th e h eater’s con tr ol u nit will st or e u p t o
five DTCs in its m emor y. If t h e cont r ol un it detects
a new fa u lt in th e system, on e t h a t is n ot alr eady
st or ed in it s m em or y, it will clea r t h e oldest of th e
five st or ed DTCs, and it will st or e t h e n ew fau lt’s
DTC. If t h e con t r ol unit det ects a r eoccur r ence of a
st or ed fa u lt, it will over writ e t h a t fa u lt ’s DTC with
th e m ost recen t occur r ence.
DIAGNOSTIC TIPS
SENSOR VALUES
Operating Voltage
The n or m a l ran ge for the Oper a t ing Volt a ge is fr om
10 volts t o 15 volt s. Th e valu e in dica t es t h e volta ge
at the heater’s Fused B+ terminal.
Heating Capacity
The nor m al r a n ge for t h e h eatin g ca pa city is fr om
0% t o 100%. The va lu e indica t es th e m oment a r y
out pu t of t h e a u xiliar y h eat er in % of t h e ma xim u m
output.
Coolant Temperature
The valu e indica t es t h e cu r r ent coola n t tempera-
ture.
Flame Sensor Resistance
The n or m a l ran ge for t h e F la m e Sensor is from 750
ohm s to 2270 ohm s. Th e value in dicat es t h e mo-
menta r y resist a n ce of the F lam e Sensor.
INP U T/OUTP UT S TATUS
Dosing Pump
A st a t u s of #ON#in dica tes th a t t h e Dosin g Pu mp is
operat ion a l. A st a t u s of #OFF#indica t es t h e Dosin g
Pu m p is n ot oper a tion a l.
Glow Pin
A st a t u s of #ON#in dica tes t h a t t h e Glow P in is
ener gized. A st a t u s of #OFF#in dica t es t h e Glow P in
is n ot en ergized.
Combustion Fan
A st a t u s of #ON#in dica tes th a t th e Combustion F a n
is opera t ional. A st a t u s of #OFF#indica t es t h e
Combu st ion F a n is not oper a t ion a l.
Circulation Pump
A st a t u s of #ON#indica t es t h a t t h e Cir cula t ion
Pu m p is opera t ional. A st a t u s of #OFF#indica t es th e
Cir cu la t ion Pu mp is n ot operat iona l.
Front End Blower
A st a t u s of #ON#in dica t es tha t t he Blower Motor is
operat ion a l. A st a t u s of #OFF#indica t es t he Blower
Motor is n ot opera t ion a l.
8
GENERAL INFORMATION

Static Heater Signal
A st a t u s of #ON#in dica t es t h a t t h e h eater modu le
sees the #Stat ion a r y H eatin g Mode ON#sign a l a ft er
swit ch ing on the heater with th e h eat er t im er or the
au xilia r y h ea t er swit ch . A st a t u s of #OFF#in dica t es
that the #St a t ionar y H eatin g Mode ON#signal is
not pr esent at t h e h eater modu le.
Heater Booster Mode Signal
A st a t u s of #ON#in dica t es t h a t t h e h eater modu le
sees the #H eater Boost er Mode ON#signa l a ft er
swit ch ing on t h e hea t er wit h t h e au xilia r y h eat er
swit ch . A st a t u s of #OFF#in dica t es t h a t t h e #Heater
Booster Mode ON#signa l is not pr esent at t h e
heat er modu le.
3.4 INSTRUMENT CLUSTER
The In st ru m ent Clu st er h a s ea sy-to-read in st ru -
ments, is capable of CAN bus com m u n icat ion an d
pr ovides a diagn ost ic fu n ct ion . Th e Inst r u m en t
Clu st er with ana log speedom et er, t a ch om et er, fu el
an d coolan t tem pera t ur e ga u ges comes in t wo ver-
sion s.
•Speedom eter wit h ou t er m iles-per-h ou r (m ph )
sca le a n d inn er kilomet ers-per-h ou r (km /h ) scale.
Coola n t t em pera t u r e is in dica t ed in F a h r enh eit
(for US).
•Speedom eter wit h ou t er kilom eter s-per-hou r
(km /h ) sca le an d inn er m iles-per-hou r s (mph )
sca le. Coola n t temperat u r e is in dicated in de-
gr ees Celsiu s (for Cana da ).
Below t h e speedometer, there is a LCD mult i-
fun ct ion in dica tor in clea r view of t h e dr iver. War n -
in g an d in dica t or light s (based on colored ligh t
emittin g diodes) a re loca t ed in t h e bott om of t h e
in st r u m ent clu st er with t h e except ion of t he tu r n
sign a l indicator ligh t s, ASR war n in g light a n d re-
serve fu el war n ing light. The wa r n in g lights for t h e
seat belt u sa ge a n d par kin g brake/br a ke flu id level
ar e locat ed in t h e line a bove t h e bottom lin e. Th e
in dicator t h a t illu min a t es up when th e pa rkin g
bra ke is a pplied or t h e brake flu id level is low is
different for U.S. a n d Cana da .
Wh en t h e key is tu r n ed t o th e 2nd posit ion in t h e
ign it ion, t h e fu n ct ion of t he followin g in dica t or
lights is ch ecked au t om a t ically: H igh Beam ON,
Pr eheat in g, a ir ba g m a lfun ct ion . In ca se of a brok en
LED of t h e a irba g ma lfu n ct ion ligh t , the seat belt
usa ge wa r nin g light will fla sh for 6 seconds after
th e fu nct ion ch eck is fin ished. Th e In st r u m ent
Clu st er is opera t ed wit h t he help of 4 bu t ton s
loca t ed below th e m u ltifu n ction in dica tor. Th e back-
lightin g for th e inst r u m ent clu st er uses yellow
LED’s a n d ca n be adju st ed elect r on ica lly t o da ylight
and darkness.
The in st r u m ent clu st er in cludes a war n in g
buzzer, wh ich sou n ds (in a ddition to a warn in g light
in som e ca ses) wh en:
•The h eadlights a r e on wit h t he ignit ion off a nd
th e door open ed.
•The dr iver ’s sea t belt is n ot fa st ened wit h t he
ign it ion on.
•The k ey is in t he ignit ion an d t he door is open.
•Critica l ASSYST in form a tion is displa yed in th e
mu ltifunct ion indica t or.
3.5 POWER DOOR LOCKS/RKE
3.5.1 CENTRAL LOCKING
The Cen t r a l Lockin g System lock s a ll veh icle
door s if a n y door is locked from t h e in side or
mecha n ically locked with t h e k ey from t h e ou tside.
However, un lockin g a n y door, in t ha t ma n n er, will
only u n lock t h a t pa r t icu la r door. The Mast er Door
Lock Swit ch on t h e da sh en a bles t h e opera t or t o
lock/un lock a ll doors. By pr essing t h e t op of t h e
rocker t ype swit ch on ce, all door s will lock. Pr essin g
th e swit ch a ga in will u n lock a ll door s. P r essin g t h e
lower par t of th e swit ch on ce will lock all door s
except t h e dr iver door. P r essin g t h e lower pa r t
aga in will un lock a ll doors except t he dr iver door. If
th e Centr a l Lockin g System a u t om a t ically u n lock s
aft er t h e veh icle wa s a tt em pt ed t o be locked, a t
least on e door is n ot pr oper ly closed.
Ther e a re t wo LED in dicator s in th e Mast er Door
Lock Swit ch. Th e left in dica t or is for th e dr iver door
an d th e r igh t in dicator is for all pa ssenger/ca r go
door s. Th ese will indica t e if a door is aja r or if t h e
door s a r e locked. The door a ja r swit ch es a r e par t of
th e door lock m ot or a n d a r e m ou n t ed in th e door
la t ch a ssembly.
In side ea ch door lock m ot or t h ere is a com m a n d
swit ch . The com m a n d swit ch is operat ed by t h e
plu n ger a n d sign a ls an y cha n ge in th e lock st a t u s,
locked or u n lock ed. E a ch com m a n d swit ch is wired
to t h e Centr a l Tim er Modu le (CTM) som etim es
refer r ed t o a s t h e Cen t r a l Lockin g Module. If a ll
door s a r e closed a n d a r e u n locked, and a n y door is
locked by t h e key or t he in t er ior h a n dle, th ereby
cha n gin g t h e com m a n d swit ch , a ll doors will be
locked. If on e of th e door lock m ot or s does n ot r ea ch
th e en d posit ion aft er a locking com m a n d, it will be
detected by t h e CTM (comm a n d switch not in
#Locked#posit ion) an d t he veh icle will be unlocked.
3.5.2 REMOTE KEYLESS ENTRY (RKE)
The SKRE E M is a com bin a t ion of t h e Remote
Keyless En t r y Module a n d th e SKIM (Sent r y Key
Im m obilizer Modu le). It is loca t ed beh ind th e In-
st r u m ent Clust er a n d ha s a n a n tenna t h a t goes u p
9
GENERAL INFORMATION

th e A-pillar. The SKRE E M r eceives ra dio messa ges
from t h e RKE tra n sm it t er (fob) a n d sen ds com-
ma n ds via t h e RKE In t er fa ce circuit t o th e CTM. If
th e veh icle is equ ipped wit h VTSS, th e Securit y
Syst em Modu le will be con n ect ed in series between
the SKREEM and the CTM.
Confirma t ion of t h e RKE Lock/Un lock st a t e is
accom plished via th e t u r n sign a ls. Wh en t h e veh icle
is lock ed via RKE t h e tu r n signa ls will fla sh t h r ee
tim es. When it is u n locked via RKE, t h e t u r n
sign a ls will fla sh one tim e. If t h e vehicle ha s been
un locked via RKE a n d n o door is open ed with in 40
seconds, t h e ent ir e veh icle will be locked a gain
au t oma t ica lly.
If a tr a n sm itt er (fob) is oper a t ed m or e t h a n 255
tim es in su ccession beyond t he r a nge of t h e r eceiver
(SKRE E M), th e RKE port ion of t h e key will becom e
in oper a t ive. In order to put it back in syn ch r on iza-
tion it will be n ecessar y t o ha ve ALL t h e ot h er
tr a nsm itters th a t a r e used wit h this veh icle a va il-
able a n d follow the followin g procedur e:
1. Cycle the ignition on a n d off 2 tim es wit h in 6
seconds (lea ve in off position ).
2. P r ess t he lock or u nlock bu t ton of t h e disa bled
tr a nsm itter with in 3 secon ds of t ur n in g th e
ign it ion off.
3. P r ess a n y bu t ton (lock or un lock) 3 mor e t im es
wit h in 6 seconds.
4. Wait 10 secon ds.
5. P ress a n y but t on of ALL ot h er tra n smit t ers
belon ging t o t h is veh icle a t lea st on ce with in
th e n ext 20 seconds.
For pr oblems rela t ed to t h e Imm obilizer fu n ct ion
of t h e SKRE E M, see Service In for m a t ion.
3.5. 3 AUTO DOOR LOCKS
Wh en ever th e engine is st a rt ed, th e CTM r eceives
a m essa ge to lock all door s except t h e dr iver s door.
This is accom plished thr ou gh th e D+ Rela y. The D+
Rela y is contr olled by th e In st r u m ent Clust er wh ich
receives a com m a n d fr om th e E CM th a t t h e engin e
is r u nn ing. Th is rela y su pplies power t o t h e CTM
(for aut o lockin g), t he da ytim e r u n n ing la mps a n d
th e r ear win dow defogger.
3.5.4 ACCIDENT RESPONSE
The CTM is h a r dwir ed to t h e Air ba g Con t rol
Module t h r ou gh t h e E n h a nced Accident Report
Driver cir cu it . Anyt im e t h e veh icle a ir ba gs ar e
deployed, the CTM will u n lock all door s a n d a
#Crash#DTC will be st or ed in m em or y. The door
locks will be inopera t ive un t il tha t code is clea r ed. If
th e vehicle is severly ja r r ed, but n ot enou gh to
deploy th e a ir bags, it is possible t h a t t h e DTC cou ld
be set a n d t herefore th e door locks would be in op-
era ble. Whenever th e door locks a r e n ot opera-
tion a l, use t h e DRBIII a n d ch eck DTC’s . If t h e code
#ACM h a s un locked the doors#appears, use the
DRBIII and erase it.
3.6 VEHICLE THEFT SECURITY SYSTEM
(VTSS)
The Secur it y Syst em Module (SSM) is loca t ed
un der t h e dr iver ’s seat . Th e SSM com m u n ica t es
wit h t h e DRBIII over th e K-lin e. If equ ipped t he
Veh icle Th eft Securit y System will m on it or t he
followin g:
•door ja m b swit ch es
•hood a ja r swit ch
•ign it ion switch
•in t erior of t h e vehicle for m ovem en t
•lon git u dina l an d t ra n sverse movement of t h e
vehicle
•rear defogger gr ids for glass breakage
•tr a iler con n ect or
To ar m th e system th e h ood a n d a ll of t h e door s
mu st be closed wh en t h e veh icle is locked with t h e
RKE t r a n smit t er or with t h e u se of t h e key in t h e
dr iver door. If t h e key is u sed, it m u st be h eld in t h e
lock posit ion for 2 seconds. Wh en t h e system is fir st
act iva t ed, t h e h a za rd la mps will fla sh 3 tim es. Also
wit h t h e system a r med, t h e Towin g/In t r u sion Sen-
sor On/Off Swit ch indica t or will fla sh t o in dica t e a n
armed system. To disarm the system use the RKE
or th e driver door lock cylinder. Un lockin g a n d
openin g one of t h e ot h er door s wit h t h e syst em
ar m ed will tr ip t h e veh icle t heft secu r it y system.
In t er ior mon itor in g is don e by t h e u se of a n
In t r u sion Sensor located in t h e fr on t h eadlin er and
wit h one or two sensor s in t h e ceiling of t h e ca r go
ar ea depen ding on how th e veh icle is equ ipped.
Monitorin g of t h e in t erior of the vehicle will begin
aft er t h e syst em ha s been a r med for 30 seconds. Th e
on/off switch loca t ed on t h e in st r u m ent pa n el ca n be
used t o t u r n off t h is feat u r e wit h th e ign it ion switch
in eit h er t h e Locked/Off or ACC posit ion. Th e vehi-
cle t ow-m on itorin g featu r e can also be switch ed off
usin g t h is swit ch. Re-lock in g t h e vehicle a second
tim e will reactiva t e t hese fea t u res.
If a t r a iler is con nected t o t h e veh icle when th e
syst em is ar m ed, t h e SSM will sen se a r esist a n ce
cha n ge on th e t ur n signa l cir cu its if t h e t r a iler
ha r ness becom es discon nected and will tr ip the
alarm.
Tripping t h e veh icle t h eft securit y syst em will
cau se t h e h a za r d la m ps t o fla sh a n d t h e sir en to
sou n d a t 30-secon d in t erva ls. The sir en is equipped
wit h it ’s own self-con t a in ed bat t ery. In t h e event th e
vehicle’s batt ery power is discon n ected t h e sir en
will contin ue to sou n d on it ’s own.
10
GENERAL INFORMATION

3.7 USING THE DRBIII!
Refer t o t h e DRBIII"user gu ide for in st r u ct ions
an d a ssist a n ce wit h r ea ding tr ou ble codes, era sin g
tr ou ble codes, a n d ot her DRBIII"fu n ct ions.
3.8 DRBIII!ERROR MESSAGES
Un der nor m al oper a t ion , t h e DRBIII"will dis-
pla y on e of on ly t wo er r or m essa ges: u ser-requ ested
WARM Boot or User-Requ est ed COLD Boot . If t he
DRBIII"shou ld displa y a n y ot h er error m essa ge,
record t h e ent ir e display an d ca ll th e STAR Cent er.
This is a sam ple of su ch a n err or m essage displa y:
ver: 2.14
date: 26 Jul93
file: key_iff.cc
date: Jul26 1993
line: 548
err: 0xi
User-Requ est ed COLD Boot
Pr ess MORE to swit ch between th is displa y
an d t h e a pplica tion screen.
Pr ess F 4 when don e n ot in g infor m a t ion.
3.9 DRBIII!DOES NOT POWER UP
(BLANK SCREEN)
If th e LED’s do n ot light or n o sou n d is em itt ed at
st a r t u p, check for loose cable con n ection s or a ba d
cable. Check t h e veh icle ba t tery volta ge (da t a lin k
conn ector ca vit y 16). A m inim u m of 11 volts is
requ ir ed to a dequ a t ely power the DRBIII". Check
for pr oper gr ou n ds a t DLC ca vities 4 and 5.
If all con n ect ion s are pr oper bet ween t h e
DRBIII"an d t h e veh icle or ot her devices, an d t h e
vehicle bat t er y is fu lly ch a r ged, a n in oper a t ive
DRBIII"ma y be th e r esult or a fa u lty ca ble or
vehicle wir in g.
3.10 DISPLAY IS NOT VISIBLE
Low t empera t u r es will a ffect t h e visibilit y of t h e
display. Adju st t h e cont r ast t o com pensat e for t his
condit ion .
4.0 DISCLAI M ERS, SAFETY,
WARNINGS
4.1 DISCLAIMERS
All infor m a tion , illustr a tion s, a n d specification s
cont a in ed in t h is m a n ua l ar e ba sed on t he la t est
in for ma t ion a va ila ble a t t he t ime of pu blica t ion .
The r igh t is r eserved to m a ke ch a n ges a t a n y t ime
wit h ou t n ot ice.
4.2 SAFETY
4.2.1 TECHNICIAN SAFETY INFORMATION
WARNING: WHEN OPERATING, ENGINES
PRODUCE AN ODORLESS GAS CALLED
CARBON MONOXIDE. INHALING CARBON
MONOXIDE GAS CAN RESULT IN SLOWER
REACTION TIMES AND CAN LEAD TO
PERSONAL INJURY OR DEATH. WHEN THE
ENGINE IS OPERATING, KEEP SERVICE
AREAS WELL VENTILATED OR ATTACH THE
VEHICLE EXHAUST SYSTEM TO THE SHOP
EXHAUST REMOVAL SYSTEM.
Set t h e pa r k in g br a ke an d block th e wh eel befor e
testin g or r epair ing t he veh icle. It is especially
im por t a n t t o block the wh eels on fron t -wheel dr ive
vehicles; t h e pa r k in g br a ke does n ot h old drive
wheels.
Wh en servicing a vehicle, a lwa ys wear eye pr o-
tection , a n d r em ove an y m etal jewelry such a s
rin gs, watch ban ds or br a celets tha t m ight m a ke an
in a dvert ent electrica l con t a ct .
Wh en dia gn osing a body syst em problem, it is
im por t a n t t o follow a ppr oved procedures wh ere
applica ble. Th ese pr ocedur es ca n be foun d in th is
11
GENERAL INFORMATION

Gen er a l In for m a t ion Section or in th e service man -
ua l pr ocedures. Followin g t hese pr ocedures is ver y
im por t a n t t o t h e sa fety of t h e in dividu a ls perfor m -
in g dia gnost ic t est s.
4.2.2 VEHICLE PREPARATION FOR
TESTING
Mak e su re t h e vehicle bein g tested ha s a fu lly
cha r ged bat t er y. If it does n ot , false diagnostic codes
or err or m essa ges m a y occu r.
4.2.3 SERVICING SUB-ASSEMBLIES
Som e com pon ents of t h e body syst em a r e in-
tended to be serviced a s a n a ssembly only. Att em pt -
in g t o r em ove or repair cert a in system su bcom po-
nents ma y r esult in persona l inju r y a n d/or
im pr oper syst em operat ion . Only t h ose components
wit h appr oved r epa ir a n d in st a lla t ion pr ocedu r es in
th e ser vice man u al should be serviced.
4.2.4 DRBIII!SAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIII!MULTIMETER IS DANGEROUS.
READ ALL DRBIII!INSTRUCTIONS BEFORE
USING THE MULTIMETER. FAILURE TO
FOLLOW THESE INSTRUCTIONS CAN
RESULT IN PERSONAL INJURY OR DEATH.
•Follow th e vehicle man u fa ct u r er ’s service speci-
fica t ion s a t a ll t im es.
•Do n ot u se t he DRBIII"if it has been damaged.
•Do n ot use t h e t est lea ds if t he in su lat ion is
da m a ged or if m eta l is exposed.
•To a void electr ical sh ock, do not t ou ch t h e t est
leads, t ips, or t h e cir cu it bein g t est ed.
•Choose th e pr oper r a nge a n d fu n ct ions for t h e
measu r em ent . Do n ot t ry volt a ge or cu rr en t m ea -
su r em ent t h at m a y exceed t h e rat ed capa city.
•Do n ot exceed t he limits sh own in th e t a ble below:
FUNCTION INPUT LIMIT
Volts 0 - 500 pea k volt s AC
0 - 500 volt s DC
Ohm s (Resist a nce)* 0 - 1.12 m ega oh ms
Fr equen cy Mea su r e
Fr equen cy Gen erat ed
0-10kHz
Temperat u r e -58 - +1100°F
-50 - +600°C
* Oh m s ca n n ot be measur ed if volt a ge is pr esent.
Ohm s ca n be mea su red only on a n on -power ed
cir cu it .
– Volt a ge bet ween a n y t erm ina l a n d gr ou n d
mu st n ot exceed 500v DC or 500v pea k AC.
– Use ca u t ion wh en m easu r ing volta ge a bove
25v DC or 25v AC.
– Use th e low cur r ent sh u n t t o m ea su r e cir cu it s
up to 10A. U se t he h igh cu r rent cla m p t o
measu r e circuit s exceeding 10A.
– Wh en t estin g for t h e presence of volta ge or
cur r ent , ma ke sur e t h e m eter is fu n ct ion ing
corr ectly. Ta ke a r eadin g of a kn own voltage or
cur r ent before a cceptin g a zero r eadin g.
– Wh en m easu r in g cur r ent , con n ect t h e meter in
series wit h t h e loa d.
– Disconn ect the live t est lea d before discon n ect-
in g t h e com m on t est lead.
– Wh en u sing t h e m eter fun ct ion, keep th e
DRBIII"away fr om spa r k plu g or coil wir es to
avoid m easur ing er r or fr om ou t side in t erfer-
ence.
4.3 WARNINGS
4.3.1 VEHICLE DAMAGE WARNINGS
Befor e discon n ectin g a n y con t r ol m odu le, ma ke
su r e t h e ign it ion is ‘‘off ’’. F a ilure t o do so cou ld
da m a ge t h e m odu le.
Wh en testin g volta ge or cont inu it y at a n y cont r ol
modu le, use th e t er m in a l side (not t he wir e end) of
th e con nector. Do n ot pr obe a wir e th r ough t h e
in su la t ion ; t h is will da m a ge it a n d even t u a lly cause
it to fa il beca u se of cor r osion. Be ca reful wh en
perform in g elect rica l t ests so a s to pr event a cciden-
ta l sh or t ing of termin a ls. Su ch m ista kes ca n dam-
age fu ses or com ponents. Also, a second code could
be set, makin g diagn osis of th e or igin a l pr oblem
mor e difficu lt .
4.3.2 ROAD TESTING A COMPLAINT
VEHICLE
Som e com plain t s will r equire a t est dr ive a s pa r t
of t h e r epair ver ifica t ion pr ocedu r e. Th e pu rpose of
th e t est dr ive is t o t r y to du plica te t h e dia gnostic
code or sym pt om con dition.
12
GENERAL INFORMATION