Dodge Neon 2001 User manual

TABLE OF CONTENTS
1.0 INTRODUCTION .........................................................1
1.1 SYSTEM COVERAGE ...............................................1
1.2 SIX-STEP TROUBLESHOOTING PROCEDURE ..........................1
2.0 IDENTIFICATION OF SYSTEM .............................................1
3.0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION ......................1
3.1 AIRBAG SYSTEM ...................................................1
3.1.1 DRIVER AIRBAG MODULE (DAB)...............................2
3.1.2 CLOCKSPRING..............................................2
3.1.3 PASSENGER AIRBAG MODULE (PAB) ..........................3
3.1.4 SIDE IMPACT AIRBAG CONTROL MODULES (SIACM) .............3
3.1.5 SEAT AIRBAG MODULES .....................................3
3.1.6 ACM/SIACM DIAGNOSTIC TROUBLE CODES ....................4
3.1.6.1 ACTIVE CODES .............................................4
3.1.6.2 STORED CODES ............................................4
3.2 AUDIO SYSTEM ....................................................4
3.3 EXTERIOR LIGHTING ...............................................5
3.4 ELECTRO/MECHANICAL INSTRUMENT CLUSTER (EMIC).................5
3.5 INTERIOR LIGHTING ................................................5
3.6 REMOTE KEYLESS ENTRY MODULE ..................................5
3.6.1 VEHICLE THEFT SECURITY SYSTEM...........................6
3.6.2 POWER DOOR LOCKS .......................................6
3.6.2.1 CENTRAL LOCKING..........................................6
3.6.2.2 ROLLING (AUTOMATIC) DOOR LOCKS..........................6
3.6.2.3 DOOR LOCK INHIBIT.........................................6
3.6.2.4 POWER DECKLID RELEASE ..................................6
3.6.2.5 PANIC MODE (IF EQUIPPED) ..................................6
3.7 VEHICLE COMMUNICATION..........................................6
3.8 USING THE DRBIIIT.................................................8
3.8.1 DRBIIITERROR MESSAGES AND BLANK SCREEN ...............8
3.8.2 DRBIIITDOES NOT POWER UP................................8
3.8.3 DISPLAY IS NOT VISIBLE .....................................8
4.0 DISCLAIMERS, SAFETY, WARNINGS .......................................8
4.1 DISCLAIMERS......................................................8
4.2 SAFETY...........................................................8
4.2.1 TECHNICIAN SAFETY INFORMATION...........................8
4.2.2 VEHICLE PREPARATION FOR TESTING.........................8
4.2.3 SERVICING SUB-ASSEMBLIES ................................9
4.2.4 DRBIIITSAFETY INFORMATION................................9
4.3 WARNINGS ........................................................9
4.3.1 VEHICLE DAMAGE WARNINGS ................................9
4.3.2 ROAD TESTING A COMPLAINT VEHICLE........................9
5.0 REQUIRED TOOLS AND EQUIPMENT ......................................9
6.0 GLOSSARY OF ACRONYMS .............................................10
7.0 DIAGNOSTIC INFORMATION AND PROCEDURES ...........................11
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TABLE OF CONTENTS - Continued
AIRBAG
ACM ACCELEROMETER - ACTIVE.........................................12
ACM ACCELEROMETER - STORED .......................................12
ACM INTERNAL 1 - ACTIVE ..............................................12
ACM INTERNAL 1 - STORED .............................................12
ACM OUTPUT DRIVER 1 - ACTIVE ........................................12
ACM OUTPUT DRIVER1-STORED .......................................12
ACM STORED ENERGY FIRING 1 - ACTIVE.................................12
ACM STORED ENERGY FIRING1-STORED ...............................12
ACM STORED ENERGY LOGIC - ACTIVE...................................12
ACM STORED ENERGY LOGIC - STORED..................................12
ACM, NO PCI TRANSMISSION - ACTIVE ...................................12
ACM, SAFING SENSOR - ACTIVE .........................................12
ACM, SAFING SENSOR - STORED ........................................12
ACM NOT CONFIGURED FOR SAB - ACTIVE ...............................15
ACM NOT CONFIGURED FOR SAB - STORED ..............................17
ACM, CLUSTER MESSAGE MISMATCH - ACTIVE ............................18
ACM, CLUSTER MESSAGE MISMATCH - STORED...........................19
ACM, DRIVER SQUIB CIRCUIT OPEN - STORED ............................19
ACM, DRIVER SQUIB CIRCUIT SHORT - STORED ...........................19
ACM, DRIVER SQUIB SHORT TO BATTERY - STORED .......................19
ACM, DRIVER SQUIB SHORT TO GROUND - STORED .......................19
ACM, LOSS OF IGNITION RUN-START - STORED............................19
ACM, NO CLUSTER MESSAGE - STORED..................................19
ACM, NO PCI TRANSMISSION - STORED ..................................19
ACM, PASSENGER SQUIB CIRCUIT OPEN - STORED ........................19
ACM, PASSENGER SQUIB CIRCUIT SHORT - STORED.......................19
ACM, PASSENGER SQUIB SHORT TO BATTERY - STORED...................19
ACM, PASSENGER SQUIB SHORT TO GROUND - STORED ...................19
ACM, WARNING LAMP CIRCUIT OPEN/SHORT - STORED ....................19
ACM, DRIVER SQUIB CIRCUIT OPEN - ACTIVE .............................22
ACM, DRIVER SQUIB CIRCUIT SHORT - ACTIVE ............................25
ACM, DRIVER SQUIB SHORT TO BATTERY - ACTIVE ........................28
ACM, DRIVER SQUIB SHORT TO GROUND - ACTIVE ........................31
ACM, INTERROGATE LEFT SIACM - (ACTIVE ...............................34
ACM, INTERROGATE LEFT SIACM - STORED...............................35
ACM, NO LEFT SIACM MESSAGE - STORED ...............................35
LEFT SIACM, NO PCI TRANSMISSION - STORED............................35
LEFT SIACM, SEAT SQUIB CIRCUIT OPEN - STORED........................35
LEFT SIACM, SEAT SQUIB CIRCUIT SHORT - STORED.......................35
LEFT SIACM, SEAT SQUIB SHORT TO BATTERY - STORED...................35
LEFT SIACM, SEAT SQUIB SHORT TO GROUND - STORED...................35
ACM, INTERROGATE RIGHT SIACM - ACTIVE...............................37
ACM, INTERROGATE RIGHT SIACM - STORED..............................38
ACM, NO RIGHT SIACM MESSAGE - STORED ..............................38
RIGHT SIACM, NO PCI TRANSMISSION - STORED ..........................38
RIGHT SIACM, SEAT SQUIB CIRCUIT OPEN - STORED.......................38
RIGHT SIACM, SEAT SQUIB CIRCUIT SHORT - STORED .....................38
RIGHT SIACM, SEAT SQUIB SHORT TO BATTERY - STORED .................38
RIGHT SIACM, SEAT SQUIB SHORT TO GROUND - STORED..................38
ACM, LOSS OF IGNITION RUN ONLY - ACTIVE..............................40
ACM, LOSS OF IGNITION RUN-START - ACTIVE.............................43
ACM, NO CLUSTER MESSAGE - ACTIVE...................................46
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ACM, NO LEFT SIACM MESSAGE - ACTIVE.................................47
ACM, NO RIGHT SIACM MESSAGE (ACTIVE) ...............................48
ACM, PASSENGER SQUIB CIRCUIT OPEN - ACTIVE .........................49
ACM, PASSENGER SQUIB CIRCUIT SHORT - ACTIVE........................52
ACM, PASSENGER SQUIB SHORT TO BATTERY - ACTIVE ....................54
ACM, PASSENGER SQUIB SHORT TO GROUND - ACTIVE ....................56
ACM, WARNING LAMP CIRCUIT OPEN/SHORT - ACTIVE .....................58
LEFT SIACM ACCELEROMETER 1 - ACTIVE ................................59
LEFT SIACM ACCELEROMETER1-STORED ...............................59
LEFT SIACM ACCELEROMETER 2 - ACTIVE ................................59
LEFT SIACM ACCELEROMETER2-STORED ...............................59
LEFT SIACM INTERNAL 1 - ACTIVE........................................59
LEFT SIACM INTERNAL 1 - STORED ......................................59
LEFT SIACM OUTPUT DRIVER 1 - ACTIVE .................................59
LEFT SIACM OUTPUT DRIVER1-STORED ................................59
LEFT SIACM, LOSS OF IGNITION RUN-START - ACTIVE......................59
LEFT SIACM, NO PCI TRANSMISSION - ACTIVE.............................59
LEFT SIACM, SEAT SQUIB CIRCUIT OPEN - ACTIVE.........................61
LEFT SIACM, SEAT SQUIB CIRCUIT SHORT- ACTIVE ........................64
LEFT SIACM, SEAT SQUIB SHORT TO BATTERY - ACTIVE....................66
LEFT SIACM, SEAT SQUIB SHORT TO GROUND - ACTIVE ....................69
RIGHT SIACM ACCELEROMETER 1 - ACTIVE ...............................71
RIGHT SIACM ACCELEROMETER1-STORED..............................71
RIGHT SIACM ACCELEROMETER 2 - ACTIVE ...............................71
RIGHT SIACM ACCELEROMETER2-STORED..............................71
RIGHT SIACM INTERNAL 1 - ACTIVE ......................................71
RIGHT SIACM INTERNAL 1 - STORED .....................................71
RIGHT SIACM OUTPUT DRIVER 1 - ACTIVE ................................71
RIGHT SIACM OUTPUT DRIVER1-STORED ...............................71
RIGHT SIACM, LOSS OF IGNITION RUN-START - ACTIVE.....................71
RIGHT SIACM, NO PCI TRANSMISSION - ACTIVE ...........................71
RIGHT SIACM, SEAT SQUIB CIRCUIT OPEN - ACTIVE........................73
RIGHT SIACM, SEAT SQUIB CIRCUIT SHORT - ACTIVE ......................75
RIGHT SIACM, SEAT SQUIB SHORT TO BATTERY - ACTIVE...................77
RIGHT SIACM, SEAT SQUIB SHORT TO GROUND - ACTIVE...................79
*AIRBAG INDICATOR ON WITHOUT ACTIVE TROUBLE CODES................81
AUDIO
ALL OUTPUTS SHORTED................................................82
AM SECTION ..........................................................85
CASS ERROR..........................................................85
CASSETTE COMMUNICATION FAULT......................................85
CASSETTE EJECT FAILURE..............................................85
CASSETTE LOADING FAILURE ...........................................85
CASSETTE TAPE TENSION HIGH .........................................85
CASSETTE TAPE TENSION LOW..........................................85
CD ERROR ............................................................85
CD MECHANICAL FAILURE ..............................................85
FM SECTION...........................................................85
MICRO OUTPUT FAILURE ...............................................85
RADIO ERROR .........................................................85
*AM/FM SWITCH INOPERATIVE...........................................85
*ANY STATION PRESET SWITCH INOPERATIVE.............................85
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*BALANCE INOPERATIVE ................................................85
*CD EJECT SWITCH INOPERATIVE........................................85
*EQUALIZER INOPERATIVE ..............................................85
*FADER INOPERATIVE ..................................................85
*FF/RW SWITCH INOPERATIVE...........................................85
*HOUR/MINUTE SWITCHES INOPERATIVE .................................85
*PAUSE/PLAY SWITCH INOPERATIVE .....................................85
*PWR SWITCH INOPERATIVE ............................................85
*SCAN SWITCH INOPERATIVE............................................85
*SEEK SWITCH INOPERATIVE............................................85
*SET SWITCH INOPERATIVE .............................................85
*TAPE EJECT SWITCH INOPERATIVE......................................85
*TIME SWITCH INOPERATIVE ............................................85
*TUNE SWITCH INOPERATIVE............................................85
CD CHANGER MECHANICAL FAILURE.....................................88
CD CHANGER PLAY FAILURE ............................................89
CD CHANGER READ FAILURE............................................89
IMPROPER DISK IN CD CHANGER........................................89
CD CHANGER POWER SUPPLY TOO HIGH.................................90
CD CHANGER TEMPERATURE HIGH ......................................91
CD CHANGER TEMPERATURE LOW ......................................91
CD PLAY FAILURE ......................................................92
CD READ FAILURE .....................................................92
IMPROPER DISK IN CD..................................................92
CD TEMPERATURE HIGH................................................93
CD TEMPERATURE LOW ................................................93
FRONT OUTPUT SHORT.................................................94
LEFT OUTPUT SHORT ..................................................97
NO ANTENNA CONNECTION ............................................100
NO VIN RECEIVED.....................................................101
VIN MISMATCH........................................................101
POWER SUPPLY TOO HIGH.............................................102
REAR OUTPUT SHORT.................................................103
RIGHT OUTPUT SHORT ................................................105
COMMUNICATION
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM INSTRUMENT CLUSTER . .108
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM RKE....................110
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM SENTRY KEY IMMOBILIZER
MODULE .............................................................112
*NO RESPONSE FROM ACM ............................................114
*NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE ...................116
*NO RESPONSE FROM LEFT SIACM .....................................118
*NO RESPONSE FROM PCM (PCI BUS)...................................120
*NO RESPONSE FROM PCM (SCI ONLY)..................................121
*NO RESPONSE FROM RADIO ..........................................124
*NO RESPONSE FROM RIGHT SIACM ....................................126
*NO RESPONSE FROM TRANSMISSION CONTROL MODULE ................128
*PCI BUS COMMUNICATION FAILURE ....................................131
EXTERIOR LIGHTING
*HIGH BEAM HEADLAMPS WILL NOT TRN ON .............................133
*HIGH BEAM HEADLAMPS WILL NOT TURN OFF...........................135
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*LOW BEAM HEADLAMPS WILL NOT TURN OFF ...........................136
*LOW BEAM HEADLAMPS WILL NOT TRN ON .............................137
INSTRUMENT CLUSTER
ABS MESSAGE NOT RECEIVED .........................................139
ACM MESSAGE NOT RECEIVED.........................................140
FUEL LEVEL SENSOR OPEN ............................................141
FUEL LEVEL SENSOR SHORT...........................................143
PANEL DIMMER OPEN .................................................145
SBEC MESSAGE NOT RECEIVED........................................147
SKIM MESSAGE NOT RECEIVED ........................................148
*ALL GAUGES INOPERATIVE............................................149
*ANY PCI BUS INDICATOR INOPERATIVE .................................151
*BRAKE INDICATOR ALWAYS ON ........................................152
*BRAKE INDICATOR INOPERATIVE.......................................154
*FRONT FOG LAMP INDICATOR INOPERATIVE ............................156
*FUEL GAUGE INACCURATE ............................................157
*HIGH BEAM INDICATOR INOPERATIVE...................................158
*INSTRUMENT CLUSTER DIMMING INOPERATIVE..........................159
*ONE GAUGE INOPERATIVE ............................................160
*REAR FOG LAMP INDICATOR INOPERATIVE - BUX ONLY...................161
*SEATBELT INDICATOR NOT OPERATING PROPERLY ......................162
*VF DISPLAY INOPERATIVE .............................................164
INTERIOR LIGHTING
*COURTESY LAMPS INOPERATIVE - ALL LAMPS...........................165
*COURTESY LAMPS ON AT ALL TIMES ...................................166
*ILLUMINATED ENTRY INOPERATIVE.....................................169
POWER DOOR LOCKS/RKE
*ALL DOOR LOCKS INOPERATIVE .......................................170
*ALL DOORS EXCEPT DRIVER FAIL TO LOCK AND UNLOCK.................174
*ALL DOORS EXCEPT DRIVER FAIL TO UNLOCK...........................175
*ALL DOORS FAIL TO LOCK.............................................176
*ALL LOCKS INOPERATIVE FROM A DOOR LOCK SWITCH ..................178
*AUTOMATIC DOOR LOCKS INOPERATIVE ................................180
*DECKLID SOLENOID INOPERATIVE .....................................181
*DOORS LOCKABLE WITH KEY IN IGNITION & DRIVER DOOR OPEN .........182
*DRIVER DOOR FAILS TO LOCK & UNLOCK...............................184
*DRIVER DOOR FAILS TO UNLOCK ......................................186
*ONE PASSENGER DOOR FAILS TO LOCK & UNLOCK......................187
*RKE INOPERATIVE....................................................188
VEHICLE THEFT/SECURITY
HOOD AJAR SWITCH MISSING ..........................................189
VTSS PREVIOUSLY ENABLED...........................................191
*HEADLAMPS FAIL TO FLASH DURING ALARM ............................192
*HORN FAILS TO SOUND DURING ALARM ................................193
*INTRUSION SENSOR CANNOT BE DISABLED.............................194
*INTRUSION SENSOR FAILS TO TRIP VTSS ...............................195
*INTRUSION SENSOR REPEATEDLY TRIGGERS VTSS......................197
*OPEN DRIVER DOOR FAILS TO TRIP ALARM .............................198
*OPEN PASSENGER DOOR FAILS TO TRIP ALARM.........................199
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TABLE OF CONTENTS - Continued
*PARK LAMPS FAIL TO FLASH DURING ALARM ............................202
*VTSS FAILS TO ARM/DISARM FROM DRIVER DOOR CYLINDER LOCK
SWITCH..............................................................203
*VTSS FAILS TO ARM/DISARM FROM PASSENGER DOOR CYLINDER LOCK
SWITCH..............................................................204
*VTSS INDICATOR FAILS TO FLASH......................................205
*VTSS INDICATOR STAYS ON STEADY DURING ARMING....................206
*VTSS SIREN INOPERATIVE ............................................208
VERIFICATION TESTS
VERIFICATION TESTS..................................................210
8.0 COMPONENT LOCATIONS..............................................215
8.1 AIRBAG SYSTEM.................................................215
8.1.1 AIRBAG CONTROL MODULE (ACM) ..........................215
8.1.2 AIRBAG MODULE (DRIVER).................................215
8.1.3 AIRBAG MODULE (PASSENGER) ............................215
8.1.4 CLOCKSPRING............................................216
8.1.5 SIDE IMPACT AIRBAG CONTROL MODULE (SIACM) ............216
8.2 DATA LINK CONNECTOR ..........................................216
8.3 FUSE BLOCK ....................................................217
8.4 INSTRUMENT CLUSTER...........................................217
8.4.1 BASE CLUSTER...........................................217
8.4.2 PREMIUM CLUSTER .......................................217
8.5 POWER DOOR LOCKS ............................................218
8.5.1 REMOTE KEYLESS ENTRY MODULE .........................218
8.5.2 DECKLID RELEASE SOLENOID..............................218
8.5.3 DOOR LOCK MOTOR ......................................218
8.6 VEHICLE COMMUNICATION........................................219
8.6.1 CONTROLLER ANTILOCK BRAKE MODULE ...................219
8.6.2 POWERTRAIN CONTROL MODULE...........................219
8.6.3 SENTRY KEY IMMOBILIZER MODULE (SKIM) ..................219
8.7 VEHICLE THEFT SECURITY........................................220
8.7.1 REMOTE KEYLESS ENTRY MODULE .........................220
8.7.2 HOOD AJAR SWITCH ......................................220
8.7.3 DOOR CYLINDER LOCK SWITCH ............................220
8.7.4 DECKLID SECURITY SWITCH ...............................221
9.0 CONNECTOR PINOUTS ................................................223
A/C-HEATER BLOWER MOTOR - BLACK 2 WAY ............................223
A/C-HEATER CONTROL - GRAY 7 WAY ...................................223
AIRBAG CONTROL MODULE - YELLOW 23 WAY ...........................223
BLOWER MOTOR RESISTOR BLOCK - BLACK 10 WAY......................224
C208 - YELLOW (SEAT SIDE)............................................224
C208 - YELLOW (SIDE AIRBAG JUMPER SIDE).............................224
C209 - YELLOW (SIDE AIRBAG JUMPER SIDE).............................224
C209 - YELLOW (SEAT SIDE)............................................224
CLOCKSPRING - GREEN 7 WAY .........................................225
CONTROLLER ANTILOCK BRAKE - BLACK 25 WAY.........................225
DATA LINK CONNECTOR - BLACK 16 WAY ................................226
DECKLID RELEASE SWITCH (POWER RELEASE) - BLACK 2 WAY ............226
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TABLE OF CONTENTS - Continued
DECKLID SECURITY SWITCH (KNOCK OUT) - GRAY 2 WAY .................226
DECKLID SOLENOID - BLACK 2 WAY.....................................226
DOME LAMP (EXCEPT BUILT-UP-EXPORT) - BLACK 3 WAY..................227
DOME LAMP/INTRUSION SENSOR (BUILT-UP-EXPORT) - NATURAL 4 WAY . . . .227
DRIVER AIRBAG - YELLOW 2 WAY .......................................227
DRIVER CYLINDER LOCK SWITCH - BLACK 2 WAY.........................227
DRIVER DOOR AJAR SWITCH-2WAY...................................228
DRIVER DOOR LOCK MOTOR/AJAR SWITCH - BLACK 4 WAY................228
DRIVER DOOR LOCK SWITCH - BLACK 3 WAY ............................228
DRIVER POWER MIRROR (LHD) - GRAY 7 WAY............................228
DRIVER POWER MIRROR (RHD) - BLUE 7 WAY............................229
FUEL PUMP MODULE - LIGHT GRAY 4 WAY ...............................229
HEADLAMP LEVELING SWITCH (BUILT-UP-EXPORT) - BLACK 4 WAY .........229
HIGH NOTE HORN (DUAL HORNS) - BLACK 2 WAY.........................229
HOOD AJAR SWITCH - BLACK 2 WAY ....................................230
IGNITION SWITCH - BLACK 10 WAY......................................230
INSTRUMENT CLUSTER - BLACK 26 WAY.................................231
FUSES (LHD) .........................................................233
CIRCUIT BREAKERS (LHD) .............................................233
FUSES (RHD) .........................................................235
CIRCUIT BREAKERS (RHD) .............................................235
LEFT FRONT DOOR SPEAKER - BLACK 2 WAY ............................236
LEFT INSTRUMENT PANEL SPEAKER - BLACK 2 WAY ......................236
LEFT REAR DOOR LOCK MOTOR/AJAR SWITCH - BLACK 4 WAY.............236
LEFT REAR SPEAKER - BLACK 2 WAY ...................................236
LEFT SEAT AIRBAG-2WAY............................................236
LEFT SIDE IMPACT AIRBAG CONTROL MODULE-8WAY...................237
LOW NOTE HORN - BLACK 2 WAY .......................................237
MULTI-FUNCTION SWITCH - GRAY 20 WAY................................238
PASSENGER AIRBAG - YELLOW 4 WAY...................................238
PASSENGER CYLINDER LOCK SWITCH - BLACK 2 WAY ....................239
PASSENGER DOOR LOCK MOTOR/AJAR SWITCH - BLACK 4 WAY ...........239
PASSENGER DOOR LOCK SWITCH - BLACK 3 WAY ........................239
PASSENGER POWER MIRROR (LHD) - GRAY 7 WAY........................239
PASSENGER POWER MIRROR (RHD) - BLUE 7 WAY .......................240
FUSES (PDC) .........................................................242
A/C COMPRESSOR CLUTCH RELAY......................................242
AUTOMATIC SHUT DOWN RELAY........................................242
ENGINE STARTER MOTOR RELAY .......................................242
FUEL PUMP RELAY ....................................................243
HORN RELAY .........................................................243
MANIFOLD TUNING VALVE RELAY (RT PACKAGE)..........................243
RADIATOR FAN RELAY .................................................243
TRANSMISSION CONTROL RELAY (EATX).................................243
POWER MIRROR SWITCH (LHD) - GRAY 10 WAY...........................244
POWER MIRROR SWITCH (RHD) - GRAY 10 WAY ..........................244
POWERTRAIN CONTROL MODULE (1.6L) - 90 WAY.........................245
POWERTRAIN CONTROL MODULE C1 (2.0L) - BLACK 40 WAY ...............246
POWERTRAIN CONTROL MODULE C2 (2.0L) - BLACK 40 WAY ...............247
RADIO C1 - BLACK 7 WAY ..............................................248
RADIO C2 - GRAY 7 WAY ...............................................248
RADIO C3 - NATURAL 2 WAY............................................248
RADIO C4 - BLACK 8 WAY ..............................................248
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TABLE OF CONTENTS - Continued
REMOTE KEYLESS ENTRY MODULE - BLACK 26 WAY......................249
RIGHT FRONT DOOR SPEAKER - BLACK 2 WAY ...........................249
RIGHT HEADLAMP (BUILT-UP-EXPORT)-3WAY...........................250
RIGHT HEADLAMP (EXCEPT BUILT-UP-EXPORT) - BLACK 3 WAY.............250
RIGHT INSTRUMENT PANEL SPEAKER - BLACK 2 WAY .....................250
RIGHT REAR DOOR LOCK MOTOR/AJAR SWITCH - BLACK 4 WAY ...........250
RIGHT REAR SPEAKER - BLACK 2 WAY ..................................251
RIGHT SEAT AIRBAG-2WAY...........................................251
RIGHT SIDE IMPACT AIRBAG CONTROL MODULE-8WAY..................251
RKE ANTENNA (JAPAN) - BLACK 2 WAY ..................................251
SENTRY KEY IMMOBILIZER MODULE - BLACK 6 WAY ......................251
SIREN (BUILT-UP-EXPORT)-4WAY......................................252
SUNROOF CONTROL MODULE-8WAY..................................252
SUNROOF MOTOR - BLACK 3 WAY ......................................252
SUNROOF SWITCH - BLACK 3 WAY......................................252
SUNROOF VENT SWITCH-3WAY.......................................252
TRANSMISSION CONTROL MODULE (EATX) - BLACK 60 WAY ...............253
10.0 SCHEMATIC DIAGRAMS................................................255
10.1 AIRBAG SYSTEM.................................................255
10.2 AUDIO SYSTEM ..................................................256
10.2.1 CD CHANGER.............................................257
10.3 EXTERIOR LIGHTING - BUX (HEADLAMPS)...........................257
10.4 INSTRUMENT CLUSTER .........................................258
10.5 INTERIOR LIGHTING ............................................259
10.6 POWER DOOR LOCKS/RKE ......................................260
10.7 VEHICLE COMMUNICATION........................................261
10.7.1 PCM COMMUNICATION ...................................262
10.8 VEHICLE THEFT SECURITY SYSTEM ...............................263
10.8.1 THATCHAM SYSTEM ......................................263
10.8.2 BASE SYSTEM ............................................264
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1.0 INTRODUCTION
The procedures contained in this manual include
all the specifications, instructions and graphics
needed to diagnose 2001 body system problems. The
diagnostics in this manual are based on the failure
condition or symptom being present at the time of
diagnosis.
Please follow the recommendations below when
choosing your diagnostic path.
1. First make sure the DRBIIItis communicating
with the appropriate modules; i.e., if the
DRBIIItdisplays a ‘‘No Response’’ or “Bus +/-
signal open” condition, you must diagnose that
first.
2. Read DTC’s (diagnostic trouble codes) with the
DRBIIIt.
3. If no DTC’s are present, identify the customer
complaint.
4. Once the DTC or customer complaint is identi-
fied, locate the matching test in the Table of
Contents and begin to diagnose the symptom.
All component location views are in Section 8.0. All
connector pinouts are in Section 9.0. All schematics
are in Section 10.0.
An * placed before the symptom description indi-
cates a customer complaint.
When repairs are required, refer to the appropri-
ate service manual for the proper removal and
repair procedure.
Diagnostic procedures change every year. New
diagnostic systems may be added, and carryover
systems may be enhanced. READ THIS MANUAL
BEFORE TRYING TO DIAGNOSE A VEHICLE
DIAGNOSTIC TROUBLE CODE. It is recom-
mended that you review the entire manual to be-
come familiar with all the new and changed diag-
nostic procedures.
This book reflects many suggested changes from
readers of past issues. After using this book, if you
have any comments or suggestions, please fill out
the comment form in the back of the book and mail
it back to us.
1.1 SYSTEM COVERAGE
This diagnostic procedures manual covers all
2001 PL NEON VEHICLES
1.2 SIX-STEP TROUBLESHOOTING
PROCEDURE
Diagnosis of the body system is done in six basic
steps:
•verification of complaint
•verification of any related symptoms
•symptom analysis
•problem isolation
•repair of isolated problem
•verification of proper operation
2.0 IDENTIFICATION OF
SYSTEM
The vehicle systems that are part of the ‘‘body’’
system are:
•Airbag System
•Audio System
•Exterior Lighting
•Instrument Cluster
•Interior Lighting
•Power Door Locks/Remote Keyless Entry
•Vehicle Communications
•Vehicle Theft Security System
3.0 SYSTEM DESCRIPTION AND
FUNCTIONAL OPERATION
The body system on the 2001 PL consists of a
combination of modules that communicate over the
PCI bus (Programmable Communication Interface
multiplex system). Through the PCI bus, informa-
tion about the operation of vehicle components and
circuits is relayed quickly to the appropriate mod-
ule(s).All modules receive all the information trans-
mitted on the bus even though a module may not
require all information to perform it’s function. It
will only respond to messages ‘‘addressed’’ to it
through a binary coding process. This method of
data transmission significantly reduces the com-
plexity of the wiring in the vehicle and the size of
wiring harnesses. All of the information about the
functioning of all the systems is organized, con-
trolled, and communicated by the PCI bus, which is
described in the Vehicle Communication Section of
this general information.
3.1 AIRBAG SYSTEM
TheAirbag Control Module (ACM) is bolted to the
floor panel transmission tunnel rearward from the
gear shift selector inside the vehicle. The ACM
mounting bracket is welded to the tunnel and is not
serviced with the ACM. The ACM contains a micro-
processor, the impact sensor, and energy storage
capacitor. The microprocessor contains the airbag
system logic. The ACM system logic includes On-
Board Diagnostics (OBD) capability, and communi-
cates with the instrument cluster circuitry via the
PCI data bus to control the airbag indicator lamp.
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The microprocessor in the ACM monitors the
impact sensor signal and the airbag system electri-
cal circuits to determine the system readiness. If
the ACM detects a monitored system fault, it sends
messages to the instrument cluster on the PCI data
bus to turn on the airbag indicator lamp. A pre-
programmed decision algorithm in the ACM micro-
processor determines when the deceleration rate as
signaled by the sensor indicates an impact that is
severe enough to require airbag system protection.
When the programmed conditions are met, the
ACM sends an electrical signal to deploy the airbag
system components.
The impact sensor is an accelerometer that
senses the rate of vehicle deceleration, which pro-
vides verification of the direction and severity of an
impact. The impact sensor is calibrated for the
specific vehicle, and is only serviced as a unit with
the ACM.
The ACM also contains an energy-storage capac-
itor. The purpose of the capacitor is to provide
airbag system protection in a severe secondary
impact if the initial impact has damaged or discon-
nected the battery, but was not severe enough to
deploy the airbags.
THE AIRBAG SYSTEM IS A SENSITIVE,
COMPLEX ELECTROMECHANICAL UNIT.
BEFORE ATTEMPTING TO DIAGNOSE OR
SERVICE ANY AIRBAG SYSTEM OR RE-
LATED STEERING WHEEL, STEERING COL-
UMN, OR INSTRUMENT PANEL COMPO-
NENTSYOU MUST FIRST DISCONNECTAND
ISOLATE THE BATTERY NEGATIVE
(GROUND) CABLE. WAIT TWO MINUTES
FOR THE SYSTEM CAPACITOR TO DIS-
CHARGE BEFORE FURTHER SYSTEM SER-
VICE. THIS IS THE ONLY SURE WAY TO
DISABLE THE AIRBAG SYSTEM. FAILURE
TO DO THIS COULD RESULT IN ACCIDEN-
TAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
NEVER STRIKE OR KICK THE AIRBAG
CONTROL MODULE, AS IT CAN DAMAGE
THE IMPACT SENSOR OR AFFECT ITS CAL-
IBRATION. IF AN AIRBAG CONTROL MOD-
ULE IS ACCIDENTALLY DROPPED DURING
SERVICE, THE MODULE MUST BE
SCRAPPED AND REPLACED WITH A NEW
UNIT.
The airbag warning lamp is the only point at
which the customer can observe ‘‘symptoms’’ of
system malfunction. Whenever the ignition key is
turned to the ‘‘run’’ or ‘‘start’’ position, the MIC
performs a lamp check by turning the airbag warn-
ing lamp on for 6-8 seconds. If the lamp turns off, it
means that the ACM has checked the system and
found it to be free of discernible malfunctions. If the
lamp remains on, there could be an active fault in
the system or the MIC lamp circuit may be inter-
nally shorted to ground. If the lamp comes on and
stays on for a period longer than 6-8 seconds then
goes off, there is usually an intermittent problem in
the system.
Perform the WARNING LAMP OPEN procedure
in this book to find the cause of any customer
complaint regarding the AIRBAG warning lamp,
such as:
•warning lamp does not illuminate
•warning lamp stays illuminated with no active
DTC’s
The ACM cannot be repaired or adjusted and, if
damaged or faulty, it must be replaced.
3.1.1 DRIVER AIRBAG MODULE (DAB)
The airbag protective trim cover is the most
visible part of the driver side airbag system. The
module is mounted directly to the steering wheel.
Located under the trim cover are the horn switch,
the airbag cushion, and the airbag cushion support-
ing components. The airbag module includes a
housing to which the cushion and inflator are
attached and sealed. The airbag module cannot be
repaired, and must be replaced if deployed or in any
way damaged. The inflator assembly is mounted to
the back of the airbag module. The inflator seals the
hole in the airbag cushion so it can discharge the
gas it produces directly into the cushion when
supplied with the proper electrical signal. The pro-
tective trim cover is fitted to the front of the airbag
module and forms a decorative cover in the center of
the steering wheel. Upon airbag deployment, this
cover will split at a predetermined breakout line.
THE AIRBAG MODULE INFLATOR ASSEM-
BLY CONTAINS SODIUM AZIDE AND POTAS-
SIUM NITRATE. THESE MATERIALS ARE
POISONOUS AND EXTREMELY FLAMMA-
BLE. CONTACT WITH ACID, WATER, OR
HEAVY METALS MAY PRODUCE HARMFUL
AND IRRITATING GASES (SODIUM HY-
DROXIDE IS FORMED IN THE PRESENCE
OF MOISTURE) OR COMBUSTIBLE COM-
POUNDS. IN ADDITION, THE PASSENGER
AIRBAG MODULE CONTAINS ARGON GAS
PRESSURIZED TO OVER 2500 PSI. DO NOT
ATTEMPT TO DISMANTLEANAIRBAG MOD-
ULE OR TAMPER WITH ITS INFLATOR. DO
NOT PUNCTURE, INCINERATE, OR BRING
INTO CONTACT WITH ELECTRICITY. DO
NOT STORE AT TEMPERATURE EXCEED-
ING 93°C (200°F).
3.1.2 CLOCKSPRING
The clockspring is mounted on the steering col-
umn behind the steering wheel. This assembly
consists of a plastic housing which contains a flat,
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ribbon-like, electrically conductive tape that winds
and unwinds with the steering wheel rotation. The
clockspring is used to maintain a continuous elec-
trical circuit between the instrument panel wire
harness and the driver side airbag module, the horn
switch, and the vehicle speed control switches on
vehicles that are so equipped. The clockspring must
be properly centered when it is installed on the
steering column following any service removal, or it
will be damaged. The clockspring cannot be re-
paired it must be replaced.
3.1.3 PASSENGER AIRBAG MODULE (PAB)
The airbag door in the instrument panel top cover
above the glove box is the most visible part of the
passenger side airbag system. Located under the
airbag door is the airbag cushion and its supporting
components. The airbag module includes a housing
to which the cushion and inflator are attached and
sealed. The airbag module cannot be repaired, and
must be replaced if deployed or in any way dam-
aged. The inflator assembly is mounted to the back
of the airbag module. The inflator includes a small
canister of highly compressed argon gas. The infla-
tor seals the hole in the airbag cushion so it can
discharge the compressed gas it contains directly
into the cushion when supplied with the proper
electrical signal. The airbag door has a living hinge
at the top, which is secured to the instrument panel
top cover. The door also has predetermined break-
out lines concealed beneath its decorative cover.
Upon airbag deployment, the airbag door will split
at the breakout lines and the door will pivot out of
the way.
THE AIRBAG MODULE INFLATOR ASSEM-
BLY CONTAINS SODIUM AZIDE AND POTAS-
SIUM NITRATE. THESE MATERIALS ARE
POISONOUS AND EXTREMELY FLAMMA-
BLE. CONTACT WITH ACID, WATER, OR
HEAVY METALS MAY PRODUCE HARMFUL
AND IRRITATING GASES (SODIUM HY-
DROXIDE IS FORMED IN THE PRESENCE
OF MOISTURE) OR COMBUSTIBLE COM-
POUNDS. IN ADDITION, THE PASSENGER
AIRBAG MODULE CONTAINS ARGON GAS
PRESSURIZED TO OVER 2500 PSI. DO NOT
ATTEMPT TO DISMANTLEANAIRBAG MOD-
ULE OR TAMPER WITH ITS INFLATOR. DO
NOT PUNCTURE, INCINERATE, OR BRING
INTO CONTACT WITH ELECTRICITY. DO
NOT STORE AT TEMPERATURE EXCEED-
ING 93°C (200°F).
REPLACE AIRBAG SYSTEM COMPO-
NENTS ONLY WITH PARTS SPECIFIED IN
THE CHRYSLER MOPAR PARTS CATALOG.
SUBSTITUTE PARTS MAY APPEAR INTER-
CHANGEABLE, BUT INTERNAL DIFFER-
ENCES MAY RESULT IN INFERIOR OCCU-
PANT PROTECTION. THE FASTENERS,
SCREWS, AND BOLTS ORIGINALLY USED
FOR THE AIRBAG SYSTEM COMPONENTS
HAVE SPECIAL COATINGS AND ARE SPE-
CIFICALLY DESIGNED FOR THE AIRBAG
SYSTEM. THEY MUST NEVER BE RE-
PLACED WITH ANY SUBSTITUTES. ANY
TIME A NEW FASTENER IS NEEDED, RE-
PLACE IT WITH THE CORRECT FASTENERS
PROVIDED IN THE SERVICE PACKAGE OR
SPECIFIED IN THE MOPAR PARTS CATA-
LOG.
3.1.4 SIDE IMPACT AIRBAG CONTROL
MODULES (SIACM)
They are located on the left and right B-post. The
SIACM perform self diagnostics and circuit tests to
determine if the system is functioning properly. If
the test finds a problem the SIACM will set both
active and stored diagnostic trouble codes. If a DTC
is active the SIACM will request that the airbag
warning lamp be turned on. The results of the
system test are transmitted on the PCI Bus to the
ACM once each second or on change in lamp state.
If the warning lamp status message from either
SIACM contains a lamp on request theACM will set
an active DTC. At the same time as the DTC is set
the ACM sends a PCI Bus message to the mechan-
ical instrument cluster (MIC) requesting the airbag
warning lamp be turned on. Observe all ACM
warning and caution statements when servicing or
handling the SIACM. SIACM are not repairable
and must be replaced if they are dropped.
3.1.5 SEAT AIRBAG MODULES
The Left and Right seat airbag modules are
located in the outboard end of the front seat backs.
The airbag module contains a bag, an inflator (a
small canister of highly compressed argon gas) and
a mounting bracket. The seat airbag module cannot
be repaired and must be replaced if deployed or in
any way damaged. When supplied with the proper
electrical signal the inflator seals the hole in the
airbag cushion so it can discharge the compressed
gas it contains directly into the cushion. Upon
deployment, the seat back trim cover will tear open
and allow the seat airbag to fully deploy between
the seat and the door.
NOTE: IT WILL BE NECESSARY TO REMOVE
THE SEAT BACK TRIM TO GAIN ACCESS TO THE
SEAT AIRBAG MODULE CONNECTOR WHEN
DIAGNOSING THE SEAT AIRBAG SYSTEM
THE SEAT AIRBAG MODULE CONTAINS
ARGON GAS PRESSURIZED TO OVER 2500
PSI. DO NOT ATTEMPT TO DISMANTLE AN
AIRBAG MODULE OR TAMPER WITH ITS
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INFLATOR. DO NOT PUNCTURE, INCINER-
ATE, OR BRING INTO CONTACT WITH ELEC-
TRICITY. DO NOT STORE AT TEMPERA-
TURE EXCEEDING 93°C (200°F). REPLACE
AIRBAG SYSTEM COMPONENTS ONLY
WITH PARTS SPECIFIED IN THE CHRYSLER
MOPAR PARTS CATALOG. SUBSTITUTE
PARTS MAY APPEAR INTERCHANGEABLE,
BUT INTERNAL DIFFERENCES MAY RE-
SULT IN INFERIOR OCCUPANT PROTEC-
TION. THE FASTENERS, SCREWS, AND
BOLTS ORIGINALLY USED FOR THE AIR-
BAG SYSTEM COMPONENTS HAVE SPE-
CIAL COATINGS AND ARE SPECIFICALLY
DESIGNED FOR THE AIRBAG SYSTEM.
THEY MUST NEVER BE REPLACED WITH
ANY SUBSTITUTES. ANY TIME A NEW FAS-
TENER IS NEEDED, REPLACE IT WITH THE
CORRECT FASTENERS PROVIDED IN THE
SERVICE PACKAGE OR SPECIFIED IN THE
CHRYSLER MOPAR PARTS CATALOG.
3.1.6 ACM/SIACM DIAGNOSTIC TROUBLE
CODES
Airbag diagnostic trouble codes consist of active
and stored codes. If more than one code exists,
diagnostic priority should be given to the active
codes.
Each diagnostic trouble code is diagnosed by
following a specific testing procedure. The diagnos-
tic test procedures contain step-by-step instructions
for determining the cause of the trouble codes. It is
not necessary to perform all of the tests in this book
to diagnose an individual code.
Active diagnostic trouble codes for the airbag
system are not permanent and will change the
moment the reason for the code is corrected. In
certain test procedures within this manual, diag-
nostic trouble coees are used as a diagnostic tool.
3.1.6.1 ACTIVE CODES
The code becomes active as soon as the malfunc-
tion is detected or key-off, whichever occurs first.
An active trouble code indicates an on-going mal-
function. This means that the malfunction is cur-
rently there every time the control module checks
that circuit/function. It is impossible to erase an
active code; active codes automatically erase by
themselves when the reason for the code has been
corrected.
With the exception of the warning lamp trouble
codes or malfunctions, when a malfunction is de-
tected, the airbag lamp remains lit for a minimum
of 12 seconds or as long as the malfunction is
present.
An “Interrogate Right SIACM or Interrogate left
SIACM” diagnostic trouble code indicates an active
trouble code in the respective module.
3.1.6.2 STORED CODES
Airbag codes are automatically stored in theACM
memory as soon as the malfunction is detected. A
“stored” code indicates there was an active code
present at some time. However, the code currently
may not be present as an active code, although
another active code could be.
When a trouble code occurs, the airbag warning
lamp illuminates for 12 seconds minimum (even if
the problem existed for less than 12 seconds). The
code is stored, along with the time in minutes it was
active, and the number of times the ignition has
been cycled since the problem was last detected.
The minimum time shown for any code will be one
minute, even if the code was actually present for
less than one minute. Thus, the time shown for a
code that was present for two minutes 13 seconds,
for example, would be three minutes.
When and if the malfunction ceases to exist, an
ignition cycle count will be initiated for that code. If
the ignition cycle count reaches 100 without a
reoccurrence of the same malfunction, the diagnos-
tic trouble code is erased and that ignition cycle
counter is reset to zero. If the malfunction reoccurs
before the count reaches 100, then the ignition cycle
counter will be reset and the diagnostic trouble code
will continue to be a stored code.
If a malfunction is not active while performing a
diagnostic test procedure, the active code diagnostic
test will not locate the source of the problem. In this
case, the stored code can indicate an area to inspect.
If no obvious problems are found, erase stored
codes, and with the ignition “on” wiggle the wire
harness and connectors, rotate the steering wheel
from stop to stop. Recheck for codes periodically as
you work through the system. This procedure may
uncover a malfunction that is difficult to locate.
3.2 AUDIO SYSTEM
The audio system on the 2001 PL consists of a
radio that communicates over the PCI bus. Each
radio system comes equipped with a standard pre-
mium 6 speaker system. The speakers are located
in the instrument panel, the front doors and the
rear “D” pillars. The instrument panel speakers are
a tweeter type speaker for high frequency. The front
door speakers are a woofer/midrange type speaker.
The rear “D” pillar speakers are a full range type
speaker. Depending on the manufacture, some sys-
tems will have a Front/Rear output system and
others will have a Left/Right output system. If one
of the speaker circuits experiences a short, the
other speakers on that output channel will also shut
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down until the circuit is repaired. The radio will
also set a trouble code, which the DRBIIItcan
display indicating which output is effected.
3.3 EXTERIOR LIGHTING
The Headlamps are controlled by the Instrument
Cluster. The Instrument Cluster is also referred to
as a “Smart Cluster”. It receives and sends mes-
sages to other modules through the PCI BUS cir-
cuit. The Headlamps are wired through the cluster
and then go to the Fuse Block to the lamps. Each
Headlamp has an independent fuse located in the
Fuse Block. For vehicles equipped with Daytime
Running Lamps, the DRL Module is integrated
with the Instrument Cluster.
3.4 ELECTRO/MECHANICAL INSTRUMENT
CLUSTER (EMIC)
There are 2 (two) Instrument Cluster types, Base
and Premium. The Premium Instrument Cluster is
equipped with a Tachometer and a Low Fuel indi-
cator.
The Instrument Cluster Speedometer, Tachome-
ter, and Engine Coolant Temperature gauges are
positioned using PCI Bus messages received from
the PCM. The Fuel gauge is a hard wired input
from the Fuel Level Sensor in the Fuel Pump
Module.
The Cluster also contains warning indicators that
are illuminated by hard wired inputs or by mes-
sages received from other modules on the PCI Bus.
The Trip/Total Odometer is a Vacuum Fluores-
cent (VF) display that is controlled by PCI Bus
messages received from the PCM. The VF display
also displays the “Door”, “Cruise”, and “Trac” mes-
sages. If the Intrument Cluster experiences a loss of
PCI Bus communication with other modules on the
Bus, the Cluster will display “nobuS” in the VF
display.
The illumination lamps are hard wired in the
Instrument Cluster. When the Park or Headlamps
are turned on, the Cluster receives a hard wire
input from the Multi-Function Switch. The Cluster
sends a Panel Lamps Dimmer Signal to ground
through the Multi-Function Switch. The varying
voltage drop is sensed by the Instrument Panel
Drivers to create a corresponding amount of illumi-
nation dimming. This dimming level is then sent
out from the Cluster to other components.
The Cluster will communicate with the DRBIIIt
to display the PCI Engine Info, PCI Bus Info, and
certain inputs/outputs. The Cluster is also capable
of performing a diagnostic Self-Test that is actuated
by depressing and holding the Odometer trip reset
stalk while cycling the ignition from the off to the on
position. The Cluster will position all of the gauges
at specified calibration points and will illuminate
all the PCI Bus controlled indicators. The Cluster
will also illuminate each segment of the VF display.
If the Cluster does not detect voltage on the
Courtesy Lamp circuit, the message “FUSE” will
alternate with the odometer/trip odometer for 30
(thirty) seconds after the ignition is turned on and
for 15 (fifteen) seconds after the vehicle is first
moved.
3.5 INTERIOR LIGHTING
The Courtesy Lamps are controlled by the instru-
ment cluster. The instrument cluster is sometimes
referred to as a “Smart Cluster Control Module”.
Some of the features that it controls are the cour-
tesy lamps, chime, and all instrument illumination.
It receives and sends messages to other modules via
the PCI bus circuit. The front turn signals are wired
through the cluster and then go to the front lamps.
For vehicles equipped with Daytime Running
Lamps, the DRL module is built into the cluster.
3.6 REMOTE KEYLESS ENTRY MODULE
The Remote Keyless Entry module controls the
Power Door Locks and the Vehicle Theft Security
System (VTSS). It also wakes up the Instrument
Cluster to turn on the illuminated entry when it
senses a signal from the RKE transmitter. The
module communicates with other modules via the
PCI bus circuit.
The RKE module monitors the Airbag Control
Module messages for the purpose of monitoring the
deployment of the airbag. Upon receiving that mes-
sage along with the verification that the ignition is
on and the vehicle speed is zero, it will provide the
“enhanced accident response feature”. This feature
will cause the module to unlock all doors and the
instrument cluster to turn the courtesy lamps on.
The RKE module communicates with the Power-
train Control Module to receive vehicle speed infor-
mation to activate the rolling door lock feature,
receive the “okay to lock” message, to receive the
vehicle information number and receive body style
information. Two transmitters are supplied with
the vehicle but a total of 4 can be programmed to
the module. The horn chirp on vehicle lock com-
mand is customer programmable except when used
in conjunction with the premium VTSS system. For
this system horn chirp is not available.
To limit the amount of battery draing during
storage, the module has 3 modes of operation: ship
mode, dealer storage mode and customer usage
mode. To change from ship mode to dealer storage
mode, the DBRIIItmay be used or the ignition
switch cycled up to 30 times. To transfer from dealer
storage to customer mode, install the IOD fuse and
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cycle the ignition switch. To transfer back to dealer
storage mode, the DRBIIItmust be used, the IOD
fuse removed, and the ignition switch cycled. Some-
times the instrument cluster doesn’t transmit a
message upon change of the IOD fuse. By cycling
the ignition, this causes the cluster to transmit the
message, thereby ensuring the RKE module has
received the most recent IOD status.
3.6.1 VEHICLE THEFT SECURITY SYSTEM
The VTSS monitors the vehicle doors, decklid,
hood and the interior of the vehicle (via the intru-
sion sensor) for unauthorized operation. The alarm
activates by sounding the siren, flashing the turn
indicators and the VTSS indicator in the instru-
ment cluster. Locking the doors with the door lock
switch (through following a normal exit sequence of
opening the door, pressing the lock button, and
closing the door), the door cylinder lock switches or
the RKE transmitter arms the system. During the
16 second arming process the VTSS indicator will
flash quickly and when the system is armed will
slow down. The system will not arm if the hood is
open (switch is grounded). Once the system is
armed, the door cylinder unlock switches may not
be used to disarm the alarm system. The only way
to disarm the system is to use the RKE transmitter
or turn the ignition on with a valid Sentry key.
All of the sensors for the VTSS system can be
monitored using the DRBIIIt. The DRBIIItis also
useful to determine the cause of a customer com-
plaint of the alarm going off with no apparent
reason.
3.6.2 POWER DOOR LOCKS
3.6.2.1 CENTRAL LOCKING
This feature allows the customer to lock/unlock
all vehicle doors with the key from either front door
cylinder lock switch. The customer can choose to
program this feature to unlock all doors with one
turn of the key or open the driver door only with the
first turn of the key and open the other doors with
the second turn. Altering the operation of the un-
lock function via the key cylinder switch from one
turn to two turns will also alter the operation of the
RKE transmitter from one press to two presses.
3.6.2.2 ROLLING (AUTOMATIC) DOOR
LOCKS
All vehicle doors are locked automatically once
the vehicle reaches a speed of 15 mph and all doors
are closed. This feature can be also be enabled/
disabled by the customer.
3.6.2.3 DOOR LOCK INHIBIT
This feature disables the door lock command from
the interior door lock switch whenever the dirver
door is open and the key is in the ignition. This
prevents the driver from locking the keys in the
ignition when using the power door locks. This
feature is inoperable if the IOD fuse is not installed.
3.6.2.4 POWER DECKLID RELEASE
Electrically releases the decklid upon two presses
of the RKE transmitter decklid release button. This
feature is disabled once the speed of the vehicle is
greater than 5 mph. This feature may be altered
with the DBRIIItto allow the decklid to be released
with one press of the RKE transmitter decklid
release button. The decklid can also be released
from the switch in the glove box.
3.6.2.5 PANIC MODE (IF EQUIPPED)
Upon activation of the panic function, the head-
lamps and park lamps flash in an alternating
manner, the horn pulses every second and the
courtesy lamps are turned on. The panic mode
allows normal nightime driving by allowing the
headlamps and park lamps to be on steady when
the headlamp switch is in the on position. Panic
mode is activated immediately by pressing the
panic button once. It does not disarm the VTSS or
unlock the doors. It is canceled by pressing the
button a second time, reaching vehicle speed
greater than 15 mph or after 3 minutes has elapsed
in panic mode. Once panic mode has been activated
there is a 2-second delay before it will turn off. Once
it is cancelled there is a 2-second delay before it can
be reactivated. This is to avoid the problem of
deactivating and immediate reactivating due to
multiple button presses.
3.7 VEHICLE COMMUNICATION
The Programmable Communication Interface or
PCI Bus is a single wire multiplexed network capa-
ble of supporting binary encoded messages shared
between multiple modules. The PCI bus circuit is
identified as D25 and is violet with a yellow tracer.
The modules are wired in parallel. Connections are
made in the harness using splices. The following
modules are used on 2001 PL:
•Airbag Control Module
•Left Side Impact Airbag Control Module
•Right Side Impact Airbag Control Module
•Controller Antilock Brake
•Power Control Module
•Radio
•CD Changer
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•Remote Keyless Entry Module
•Sentry Key Immobilizer Module
•Transmission Control Module (If Equipped)
•Mechanical Instrument Cluster
Each module provides its own bias and termina-
tion in order to transmit and receive messages. The
bus voltage is at zero volts when no modules are
transmitting and is pulled up to about seven and a
half volts when modules are transmitting.
The bus messages are transmitted at a rate
averaging 10800 bits per second. Since there is only
voltage present when the modules transmit and the
message length is only about 500 milliseconds, it is
ineffective to try and measure the bus activity with
a conventional voltmeter. The preferred method is
to use the DRBIIItlab scope. The 12v square wave
selection on the 20-volt scale provides a good view of
the bus activity. Voltage on the bus should pulse
between zero and about seven and a half volts.
Refer to the following figure for some typical dis-
plays.
The PCI Bus failure modes are broken down into
two categories. Complete PCI Bus Communication
Failure and individual module no response. Causes
of a complete PCI Bus Communication Failure
include a short to ground or battery on the PCI
circuit. Individual module no response can be
caused by an open circuit at the module, or an open
battery or ground circuit to the affected module.
Symptoms of a complete PCI Bus Communication
Failure would include but are not limited to:
•All gauges on the MIC stay at zero
•All telltales on MIC illuminate
•MIC backlighting at full intensity
•No response received from any module on the PCI
bus (except PCM)
•No start (if equipped with Sentry Key Immobi-
lizer)
Symptoms of Individual module failure could
include any one or more of the above. The difference
would be that at least one or more modules would
respond to the DRBIIIt.
Diagnosis starts with symptom identification. If
complete PCI Bus Communication Failure is sus-
pected, begin by identifying which modules the
vehicle is equipped with and then attempt to get a
response from the modules with the DRBIIIt.Ifany
modules are responding, the failure is not related to
the total bus, but can be caused by one or more
modules PCI circuit or power supply and ground
circuits. The DRBIIItmay display “BUS +/− SIG-
NALS OPEN” OR “NO RESPONSE” to indicate a
communication problem. These same messages will
be displayed if the vehicle is not equipped with that
particular module. The CCD error message is a
default message used by the DRBIIItand in no way
indicates whether or not the PCI bus is operational.
The message is only an indication that a module is
either not responding or the vehicle is not equipped.
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3.8 USING THE DRBIIIT
Refer to the DRBIIItuser’s guide for instructions
and assistance with reading trouble codes, erasing
trouble codes and other DRBIIItfunctions.
3.8.1 DRBIIITERROR MESSAGES AND
BLANK SCREEN
Under normal operation, the DRBIIItwill dis-
play one of only two error messages:
– User-Requested WARM Boot or User-Requested
COLD Boot
If the DRBIIItshould display any other error
message, record the entire display and call the
STAR Center for information and assistance. This
is a sample of such an error message display:
ver: 2.14
date: 26 Jul93
file: key_itf.cc
date: Jul 26 1993
line: 548
err: 0x1
User-Requested COLD Boot
Press MORE to switch between this display
and the application screen.
Press F4 when done noting information.
3.8.2 DRBIIITDOES NOT POWER UP
If the LED’s do not light or no sound is emitted at
start up, check for loose cable connections or a bad
cable. Check the vehicle battery voltage (data link
connector cavity 16). A minimum of 11 volts is
required to adequately power the DRBIIIt.
If all connections are proper between the
DRBIIItand the vehicle or other devices, and the
vehicle battery is fully charged, and inoperative
DRBIIItmay be the result of faulty cable or vehicle
wiring.
3.8.3 DISPLAY IS NOT VISIBLE
Low temperatures will affect the visibility of the
display. Adjust the contrast to compensate for this
condition.
4.0 DISCLAIMERS, SAFETY,
WARNINGS
4.1 DISCLAIMERS
All information, illustrations, and specifications
contained in this manual are based on the latest
information available at the time of publication.
The right is reserved to make changes at any time
without notice.
4.2 SAFETY
4.2.1 TECHNICIAN SAFETY INFORMATION
DANGER!!! ENGINES PRODUCE CARBON
MONOXIDE THAT IS ODORLESS, CAUSES
SLOWER REACTION TIME, AND CAN LEAD
TO SERIOUS INJURY. WHEN THE ENGINE IS
OPERATING, KEEP SERVICE AREAS WELL
VENTILATED OR ATTACH THE VEHICLE
EXHAUST SYSTEM TO THE SHOP EXHAUST
REMOVAL SYSTEM.
Set the parking brake and block the wheels before
testing or repairing the vehicle. It is especially
important to block the wheels on front-wheel drive
vehicles; the parking brake does not hold the drive
wheels.
When servicing a vehicle, always wear eye pro-
tection, and remove any metal jewelry such as
rings, watchbands or bracelets that might make an
inadvertent electrical contact.
When diagnosing a chassis system problem, it is
important to follow approved procedures where
applicable. These procedures can be found in this
General Information Section or in service manual
procedures. Following these procedures is very im-
portant to the safety of individuals performing
diagnostic tests.
4.2.2 VEHICLE PREPARATION FOR
TESTING
Make sure the vehicle being tested has a fully
charged battery. If it does not, false diagnostic codes
or error messages may occur.
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GENERAL INFORMATION
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4.2.3 SERVICING SUB-ASSEMBLIES
Some components of the chassis system are in-
tended to be serviced as an assembly only.Attempt-
ing to remove or repair certain system sub-
components may result in personal injury and/or
improper system operation. Only those components
with approved repair and installation procedures in
the service manual should be serviced.
4.2.4 DRBIIITSAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIIITMULTIMETER IS DANGEROUS. IT
CAN EXPOSE YOU TO SERIOUS OR
POSSIBLY FATAL INJURY. CAREFULLY
READ AND UNDERSTAND THE CAUTIONS
AND THE SPECIFICATION LIMITS.
•Follow the vehicle manufacturer’s service speci-
fications at all times.
•Do not use the DRBIIItif it has been damaged.
•Do not use the test leads if the insulation is
damaged or if metal is exposed.
•To avoid electrical shock, do not touch the test
leads, tips, or the circuit being tested.
•Choose the proper range and function for the
measurement. Do not try voltage or current mea-
surements that may exceed the rated capacity.
•Do not exceed the limits shown in the table below:
FUNCTION INPUT LIMIT
Volts 0 - 500 peak volts AC
0 - 500 volts DC
Ohms (resistance)* 0 - 1.12 megohms
Frequency Measured
Frequency Generated 0-10kHz
Temperature -58 - 1100°F
-50 - 600°C
* Ohms cannot be measured if voltage is present.
Ohms can be measured only in a non-powered
circuit.
•Voltage between any terminal and ground must
not exceed 500v DC or 500v peak AC.
•Use caution when measuring voltage above 25v
DC or 25v AC.
•Use the low current shunt to measure circuits up
to 10A. Use the high current clamp to measure
circuits exceeding 10A.
•When testing for the presence of voltage or cur-
rent, make sure the meter is functioning cor-
rectly. Take a reading of a known voltage or
current before accepting a zero reading.
•When measuring current, connect the meter in
series with test lead.
•Disconnect the live test lead before disconnecting
the common test lead.
•When using the meter function, keep the
DRBIIItaway from spark plug or coil wires to
avoid measuring error from outside interference.
4.3 WARNINGS
4.3.1 VEHICLE DAMAGE WARNINGS
Before disconnecting any control module, make
sure the ignition is ‘‘off’’. Failure to do so could
damage the module.
When testing voltage or continuity at any control
module, use the terminal side (not the wire end) of
the connector. Do not probe a wire through the
insulation, this will damage it and eventually cause
it to fail because of corrosion. Be careful when
performing electrical tests so as to prevent acciden-
tal shorting of terminals. Such mistakes can dam-
age fuses or components. Also, a second code could
be set, making diagnosis of the original problem
more difficult.
4.3.2 ROAD TESTING A COMPLAINT
VEHICLE
Some complaints will require a test drive as part
of the repair verification procedure. The purpose of
the test drive is to try to duplicate the diagnostic
code or symptom condition.
CAUTION: BEFORE ROAD TESTING A
VEHICLE, BE SURE THAT ALL
COMPONENTS ARE REASSEMBLED.
DURING THE TEST DRIVE, DO NOT TRY TO
READ THE DRBIIITSCREEN WHILE IN
MOTION. DO NOT HANG THE DRB FROM
THE REAR VIEW MIRROR OR OPERATE IT
YOURSELF. HAVE AN ASSISTANT
AVAILABLE TO OPERATE THE DRBIIIT.
5.0 REQUIRED TOOLS AND
EQUIPMENT
DRBIIIt(diagnostic read-out box)
Jumper Wires
Ohmmeter
Voltmeter
Test Light
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GENERAL INFORMATION
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6.0 GLOSSARY OF ACRONYMS
ABS antilock brake system
ACM airbag control module
AECM airbag electronic control module
(ACM)
ASDM airbag system diagnostic module
(ACM)
CAB controller antilock brake
DAB driver airbag
DLC data link connector
DTC diagnostic trouble code
LSIACM left SIACM
MIC mechanical instrument cluster
PAB passenger airbag
PCI Programmable Communication
Interface (vehicle communication
bus)
PCM powertrain control module
PDC power distribution center
PWM pulse width modulated
RKE remote keyless entry
RSIACM right SIACM
SAB seat airbag
SIACM side impact airbag control module
SKIM sentry key immobilizer module
SKIS sentry key immobilizer system
SQUIB also called initiator (located in rear
of airbag module)
TCM transmission control module
VFD vacuum fluorescent display
VTSS vehicle theft security system
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GENERAL INFORMATION
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7.0
DIAGNOSTIC INFORMATION AND
PROCEDURES
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Symptom List:
ACM ACCELEROMETER - ACTIVE
ACM ACCELEROMETER - STORED
ACM INTERNAL 1 - ACTIVE
ACM INTERNAL 1 - STORED
ACM OUTPUT DRIVER 1 - ACTIVE
ACM OUTPUT DRIVER 1 - STORED
ACM STORED ENERGY FIRING 1 - ACTIVE
ACM STORED ENERGY FIRING 1 - STORED
ACM STORED ENERGY LOGIC - ACTIVE
ACM STORED ENERGY LOGIC - STORED
ACM, NO PCI TRANSMISSION - ACTIVE
ACM, SAFING SENSOR - ACTIVE
ACM, SAFING SENSOR - STORED
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be ACM ACCELEROMETER -
ACTIVE.
When Monitored and Set Condition:
ACM ACCELEROMETER - ACTIVE
When Monitored: Continuously with the ignition on.
Set Condition: The ACM has detected a diagnostic condition, replace the module.
ACM ACCELEROMETER - STORED
When Monitored: Continuously with the ignition on.
Set Condition: The ACM has detected a diagnostic condition, replace the module.
ACM INTERNAL 1 - ACTIVE
When Monitored: Continuously with the ignition on.
Set Condition: The ACM has detected a diagnostic condition, replace the module.
ACM INTERNAL 1 - STORED
When Monitored: Continuously with the ignition on.
Set Condition: The ACM has detected a diagnostic condition, replace the module.
ACM OUTPUT DRIVER 1 - ACTIVE
When Monitored: Continuously with ignition on.
Set Condition: The ACM has detected a diagnostic condition, replace the module.
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