Chrysler 2004 Pacifica User manual

SERVICE MANUAL
2004
PACIFICA
To order the special service tools used and
illustrated, please refer to the instructions on
inside back cover.
NO PART OF THIS PUBLICATION MAY BE
REPRODUCED, STORED IN A RETRIEVAL
SYSTEM, OR TRANSMITTED, IN ANY FORM OR
BY ANY MEANS, ELECTRONIC, MECHANICAL,
PHOTOCOPYING, RECORDING, OR OTHERWISE,
WITHOUT THE PRIOR WRITTEN PERMISSION
OF DAIMLERCHRYSLER CORPORATION.
DaimlerChrysler Corporation reserves the right to make changes in design or
to make additions to or improvements in its products without imposing any
obligations upon itself to install them on its products previously manufac-
tured.
Litho in U.S.A. Copyright © 2003 DaimlerChrysler Corporation

FOREWORD
The information contained in this service manual has been prepared for the professional automotive tech-
nician involved in daily repair operations. Information describing the operation and use of standard and
optional equipment is included in the Owner’s Manual provided with the vehicle.
Information in this manual is divided into groups. These groups contain description, operation, diagnosis,
testing, adjustments, removal, installation, disassembly, and assembly procedures for the systems and compo-
nents. To assist in locating a group title page, use the Group Tab Locator by clicking to the following page. The
solid bar after the group title is aligned to a solid tab on the first page of each group. The first page of the
group has a contents section that lists major topics within the group. If you are not sure which Group contains
the information you need, look up the Component/System in the alphabetical index located in the rear of this
manual.
A Service Manual Comment form is included at the rear of this manual. Use the form to provide
DaimlerChrysler Corporation with your comments and suggestions.
Tightening torques are provided as a specific value throughout this manual. This value represents the
midpoint of the acceptable engineering torque range for a given fastener application. These torque values are
intended for use in service assembly and installation procedures using the correct OEM fasteners. When
replacing fasteners, always use the same type (part number) fastener as removed.
DaimlerChrysler Corporation reserves the right to change testing procedures, specifications, diagnosis,
repair methods, or vehicle wiring at any time without prior notice or incurring obligation.

Welcome
2004 CS Pacifica Technical Publications
Click on the icon for the desired manual
Service Manual
Gas Powertrain
Body
Chassis
Transmission

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 ......................2
3.1 GENERAL DESCRIPTION ............................................2
3.2 FUNCTIONAL OPERATION...........................................2
3.2.1 FUEL CONTROL ..........................................2
3.2.2 ON-BOARD DIAGNOSTICS...................................2
3.2.3 OTHER CONTROLS.........................................5
3.2.4 PCM OPERATING MODES ...................................9
3.2.5 NON-MONITORED CIRCUITS.................................9
3.2.6 SENTRY KEY REMOTE ENTRY SYSTEM (SKREES) OVERVIEW . . .9
3.2.7 SKREEM ON-BOARD DIAGNOSTICS...........................9
3.2.8 SKREES OPERATION ......................................10
3.2.9 PROGRAMMING THE POWERTRAIN CONTROL MODULE .......10
3.2.10 PROGRAMMING THE SKREEM ..............................11
3.2.11 PROGRAMMING THE IGNITION KEYS TO THE SKREEM.........11
3.3 DIAGNOSTIC TROUBLE CODES .....................................11
3.3.1 HARD CODE ..............................................11
3.3.2 INTERMITTENT CODE......................................12
3.3.3 STARTS SINCE SET COUNTER..............................12
3.3.4 DISTANCE SINCE MI SET...................................12
3.4 USING THE DRBIIIT................................................12
3.5 DRBIIITERROR MESSAGES AND BLANK SCREEN .....................12
3.5.1 DRBIIITDOES NOT POWER UP..............................12
3.5.2 DISPLAY IS NOT VISIBLE ...................................13
4.0 DISCLAIMERS, SAFETY, WARNINGS ......................................13
4.1 DISCLAIMERS.....................................................13
4.2 SAFETY..........................................................13
4.2.1 TECHNICIAN SAFETY INFORMATION.........................13
4.2.2 VEHICLE PREPARATION FOR TESTING.......................13
4.2.3 SERVICING SUB ASSEMBLIES ..............................13
4.2.4 DRBIIITSAFETY INFORMATION .............................13
4.3 WARNINGS AND CAUTIONS ........................................14
4.3.1 ROAD TEST WARNINGS....................................14
4.3.2 VEHICLE DAMAGE CAUTIONS ..............................14
5.0 REQUIRED TOOLS AND EQUIPMENT .....................................14
6.0 GLOSSARY OF TERMS..................................................14
7.0 DIAGNOSTIC INFORMATION AND PROCEDURES ...........................17
COMMUNICATION
*NO RESPONSE FROM PCM (PCI BUS)....................................18
*NO RESPONSE FROM PCM (PCM SCI ONLY) ..............................19
*NO RESPONSE FROM SENTRY KEY REMOTE ENTRY MODULE..............22
i

TABLE OF CONTENTS - Continued
*NO RESPONSE FROM TRANSMISSION CONTROL MODULE .................24
*PCI BUS COMMUNICATION FAILURE .....................................27
DRIVEABILITY - NGC
INTERMITTENT CONDITION..............................................30
P0016-CRANKSHAFT/CAMSHAFT TIMING MISALIGNMENT....................31
P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW .............................35
P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW .............................35
P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH .............................37
P0038-O2 SENSOR 1/2 HEATER CIRCUIT HIGH .............................37
P0068-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION...........40
P0071-AMBIENT TEMP SENSOR PERFORMANCE ...........................46
P0072-AMBIENT TEMP SENSOR LOW .....................................49
P0073-AMBIENT TEMP SENSOR HIGH.....................................51
P0107-MAP SENSOR LOW ...............................................53
P0108-MAP SENSOR HIGH...............................................56
P0111-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE.................59
P0112-INTAKE AIR TEMPERATURE SENSOR LOW...........................62
P0113-INTAKE AIR TEMPERATURE SENSOR HIGH ..........................64
P0116-ENGINE COOLANT TEMPERATURE PERFORMANCE...................66
P0117-ENGINE COOLANT TEMPERATURE SENSOR LOW ....................69
P0118-ENGINE COOLANT TEMPERATURE SENSOR HIGH ....................71
P0122-THROTTLE POSITION SENSOR #1 LOW .............................73
P0123-THROTTLE POSITION SENSOR #1 HIGH.............................76
P0125-INSUFFICIENT COOLANT TEMP FOR CLOSED-LOOP FUEL CONTROL . . .79
P0128-THERMOSTAT RATIONALITY .......................................81
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW......................86
P0131-O2 SENSOR 1/1 VOLTAGE LOW ....................................89
P0137-O2 SENSOR 1/2 VOLTAGE LOW ....................................89
P0132-O2 SENSOR 1/1 VOLTAGE HIGH ....................................92
P0138-O2 SENSOR 1/2 VOLTAGE HIGH ....................................92
P0133-O2 SENSOR 1/1 SLOW RESPONSE .................................95
P0139-O2 SENSOR 1/2 SLOW RESPONSE .................................95
P0135-O2 SENSOR 1/1 HEATER PERFORMANCE ...........................97
P0141-O2 SENSOR 1/2 HEATER PERFORMANCE ...........................97
P0171-FUEL SYSTEM 1/1 LEAN..........................................100
P0172-FUEL SYSTEM 1/1 RICH ..........................................105
P0201-FUEL INJECTOR #1 ..............................................109
P0202-FUEL INJECTOR #2 ..............................................109
P0203-FUEL INJECTOR #3 ..............................................109
P0204-FUEL INJECTOR #4 ..............................................109
P0205-FUEL INJECTOR #5 ..............................................109
P0206-FUEL INJECTOR #6 ..............................................109
P0300-MULTIPLE CYLINDER MISFIRE ....................................112
P0301-CYLINDER #1 MISFIRE ...........................................112
P0302-CYLINDER #2 MISFIRE ...........................................112
P0303-CYLINDER #3 MISFIRE ...........................................112
P0304-CYLINDER #4 MISFIRE ...........................................112
P0305-CYLINDER #5 MISFIRE ...........................................112
P0306-CYLINDER #6 MISFIRE ...........................................112
P0315-NO CRANK SENSOR LEARNED....................................120
P0325-KNOCK SENSOR #1 CIRCUIT .....................................122
P0335-CRANKSHAFT POSITION SENSOR CIRCUIT.........................125
ii

TABLE OF CONTENTS - Continued
P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT...................130
P0340-CAMSHAFT POSITION SENSOR CIRCUIT ...........................134
P0344-CAMSHAFT POSITION SENSOR INTERMITTENT .....................139
P0401 - EGR SYSTEM PERFORMANCE...................................143
P0403 - EGR CONTROL CIRCUIT ........................................146
P0404 - EGR POSITION SENSOR PERFORMANCE .........................149
P0405 - EGR POSITION SENSOR LOW ...................................153
P0406 - EGR POSITION SENSOR HIGH ...................................156
P0420-CATALYTIC 1/1 EFFICIENCY.......................................159
P0440-GENERAL EVAP SYSTEM FAILURE.................................161
P0441-EVAP PURGE SYSTEM PERFORMANCE ............................166
P0442-EVAP SYSTEM MEDIUM LEAK.....................................168
P0455-EVAP SYSTEM LARGE LEAK ......................................168
P0443-EVAP PURGE SOLENOID CIRCUIT .................................173
P0452-NVLD PRESSURE SWITCH SENSE CIRCUIT LOW ....................176
P0453-NVLD PRESSURE SWITCH SENSE CIRCUIT HIGH....................179
P0456-EVAP SYSTEM SMALL LEAK ......................................181
P0461-FUEL LEVEL SENSOR #1 PERFORMANCE ..........................183
P2066-FUEL LEVEL SENSOR #2 PERFORMANCE ..........................183
P0462-FUEL LEVEL SENSOR #1 LOW ....................................186
P0463-FUEL LEVEL SENSOR #1 HIGH ....................................186
P2067-FUEL LEVEL SENSOR #2 LOW ....................................186
P2068-FUEL LEVEL SENSOR #2 HIGH ....................................186
P0480-COOLING FAN 1 CONTROL CIRCUIT ...............................188
P0481-COOLING FAN 2 CONTROL CIRCUIT ...............................190
P0498-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT LOW..............192
P0499-NVLD CANISTER VENT VALVE SOLENOID CIRCUIT HIGH .............193
P0501-VEHICLE SPEED SENSOR #1 PERFORMANCE ......................195
P0506-IDLE SPEED LOW PERFORMANCE ................................196
P0507-IDLE SPEED HIGH PERFORMANCE ................................196
P0508-IAC VALVE SENSE CIRCUIT LOW ..................................198
P0509-IAC VALVE SENSE CIRCUIT HIGH..................................201
P0513-INVALID SKIM KEY...............................................203
P0516-BATTERY TEMPERATURE SENSOR LOW ...........................205
P0517-BATTERY TEMPERATURE SENSOR HIGH ...........................207
P0522 PRESSURE SENSOR LOW........................................209
P0532-A/C PRESSURE SENSOR LOW ....................................210
P0533-A/C PRESSURE SENSOR HIGH....................................213
P0562-BATTERY VOLTAGE LOW .........................................216
P0563-BATTERY VOLTAGE HIGH.........................................219
P0572-BRAKE SWITCH #1 CIRCUIT LOW..................................221
P0573-BRAKE SWITCH #1 CIRCUIT HIGH .................................223
P0580-SPEED CONTROL SWITCH #1 LOW ................................225
P0581-SPEED CONTROL SWITCH #1 HIGH................................227
P0582-SPEED CONTROL VACUUM SOLENOID CIRCUIT.....................229
P0586-SPEED CONTROL VENT SOLENOID CIRCUIT........................231
P0594-SPEED CONTROL SERVO POWER CIRCUIT.........................233
P0600-SERIAL COMMUNICATION LINK....................................236
P0601-INTERNAL MEMORY CHECKSUM INVALID...........................236
P0622-GENERATOR FIELD CONTROL CIRCUIT ............................237
P0627-FUEL PUMP RELAY CIRCUIT ......................................239
P0630-VIN NOT PROGRAMMED IN PCM ..................................241
P0632-ODOMETER NOT PROGRAMMED IN PCM...........................242
iii

TABLE OF CONTENTS - Continued
P0633-SKIM KEY NOT PROGRAMMED IN PCM.............................243
P0645-A/C CLUTCH RELAY CIRCUIT .....................................244
P0660-MANIFOLD TUNE VALVE SOLENOID CIRCUIT........................246
P0685-ASD RELAY CONTROL CIRCUIT ...................................249
P0688-ASD RELAY SENSE CIRCUIT LOW .................................251
P0700-TRANSMISSION CONTROL SYSTEM/READ TRANSMISSION DTCS
ON THE DRBIIIT.......................................................254
P0850-PARK/NEUTRAL SWITCH PERFORMANCE ..........................255
P1115-GENERAL TEMP SENSOR PERFORMANCE..........................256
P1593-SPEED CONTROL SWITCH STUCK.................................260
P1602-PCM NOT PROGRAMMED ........................................263
P1603-PCM INTERNAL DUAL-PORT RAM COMMUNICATION .................264
P1604-PCM INTERNAL DUAL-PORT RAM READ/WRITE INTEGRITY FAILURE. . .264
P1607-PCM INTERNAL SHUTDOWN TIMER RATIONALITY ...................264
P1696-EEPROM MEMORY WRITE DENIED/INVALID.........................265
P1697-EMR (SRI) MILEAGE NOT STORED.................................265
P1861-SIPHON LINE DISCONNECTED ....................................267
P2008-SHORT RUNNER SOLENOID CIRCUIT ..............................269
P2074-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION - HIGH
FLOW/VACUUM LEAK ..................................................271
P2096-DOWN STREAM FUEL SYSTEM 1/2 LEAN ...........................277
P2097-DOWN STREAM FUEL SYSTEM 1/2 RICH ...........................277
P2302-IGNITION COIL #1 SECONDARY CIRCUIT-INSUFFICIENT IONIZATION . . .280
P2305-IGNITION COIL #2 SECONDARY CIRCUIT - INSUFFICIENT IONIZATION. .280
P2308-IGNITION COIL #3 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION. . .280
P2311-IGNITION COIL #4 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION. . .280
P2314-IGNITION COIL #5 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION. . .280
P2317-IGNITION COIL #6 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION. . .280
P2503-CHARGING SYSTEM VOLTAGE LOW ...............................284
U0101-NO TRANSMISSION BUS MESSAGE................................287
U0140-NO BODY BUS MESSAGES .......................................289
U0155-NO CLUSTER BUS MESSAGE .....................................291
U0168-NO SKIM BUS MESSAGES........................................292
U110C-NO FUEL LEVEL BUS MESSAGE ..................................294
*CHECKING PCM POWER AND GROUND CIRCUITS ........................296
*CHECKING THE A/C RELAY OUTPUT ....................................297
SKREEM
ANTENNA FAILURE ....................................................299
COP FAILURE.........................................................299
EEPROM FAILURE.....................................................299
RAM FAILURE.........................................................299
ROMFAULT ..........................................................299
SERIAL LINK INTERNAL FAULT ..........................................299
STACK OVERFLOW FAILURE............................................299
PCM STATUS FAILURE .................................................301
SERIAL LINK EXTERNAL FAULT .........................................301
ROLLING CODE FAILURE...............................................303
VIN MISMATCH........................................................303
TRANSPONDER COMMUNICATION FAILURE ..............................305
TRANSPONDER ID MISMATCH ..........................................305
TRANSPONDER RESPONSE MISMATCH..................................305
UNPROGRAMMED SKREEM ............................................308
iv

TABLE OF CONTENTS - Continued
STARTING
*CHECKING FUEL DELIVERY............................................309
*CHECKING FUEL PRESSURE LEAK DOWN ...............................312
*CHECKING HARD START (FUEL DELIVERY SYSTEM) ......................313
*ENGINE CRANKS DOES NOT START ....................................315
*NO CRANK CONDITION................................................320
*NO RESPONSE FROM PCM WITH A NO START CONDITION ................323
*START AND STALL CONDITION .........................................324
VERIFICATION TESTS
VERIFICATION TESTS..................................................327
8.0 COMPONENT LOCATIONS..............................................333
8.1 CONTROL MODULES .............................................333
8.2 CONTROL AND SOLENOIDS .......................................333
8.3 SENSOR ........................................................335
8.4 FUEL SYSTEM AND EVAP SYSTEM .................................336
8.5 SWITCHES ......................................................336
9.0 CONNECTOR PINOUTS ................................................337
A/C COMPRESSOR CLUTCH - LT. GRAY 2 WAY ............................337
A/C PRESSURE TRANSDUCER - GRAY 4 WAY.............................337
AMBIENT TEMPERATURE SENSOR - BLACK 2 WAY ........................337
BATTERY TEMPERATURE SENSOR - BLACK 2 WAY ........................337
CAMSHAFT POSITION SENSOR - BLACK 3 WAY ...........................338
COIL ON PLUG NO.1-LT.GRAY2WAY..................................338
COIL ON PLUG NO.2-LT.GRAY2WAY..................................338
COIL ON PLUG NO.3-LT.GRAY2WAY..................................338
COIL ON PLUG NO.4-LT.GRAY2WAY..................................339
COIL ON PLUG NO.5-LT.GRAY2WAY..................................339
COIL ON PLUG NO.6-LT.GRAY2WAY..................................339
CRANKSHAFT POSITION SENSOR - BLACK 3 WAY.........................339
DATA LINK CONNECTOR - BLACK 16 WAY ................................340
EGR SOLENOID - BLACK 6 WAY.........................................340
ENGINE COOLANT TEMPERATURE SENSOR - BLACK 2 WAY................340
ENGINE OIL PRESSURE SWITCH - BLACK 2 WAY..........................340
EVAP/PURGE SOLENOID - BLACK 2 WAY .................................341
FUEL INJECTOR NO. 1 - BLACK 2 WAY ...................................341
FUEL INJECTOR NO. 2 - BLACK 2 WAY ...................................341
FUEL INJECTOR NO. 3 - BLACK 2 WAY ...................................342
FUEL INJECTOR NO. 4 - BLACK 2 WAY ...................................342
FUEL INJECTOR NO. 5 - BLACK 2 WAY ...................................342
FUEL INJECTOR NO. 6 - BLACK 2 WAY ...................................343
FUEL PUMP MODULE - BLACK 6 WAY ....................................343
GENERATOR - BLACK 2 WAY ...........................................343
INTAKE AIR TEMPERATURE SENSOR - BLACK 2 WAY ......................343
FUSES (IPM)..........................................................345
A/C COMPRESSOR CLUTCH RELAY......................................345
FUEL PUMP RELAY ....................................................346
MANIFOLD TUNING VALVE RELAY .......................................346
STARTER MOTOR RELAY...............................................346
v

TABLE OF CONTENTS - Continued
INTEGRATED POWER MODULE C1 - BLACK 15 WAY .......................347
INTEGRATED POWER MODULE C2 - DK. GRAY 4 WAY......................347
INTEGRATED POWER MODULE C3 - GRAY 2 WAY .........................347
INTEGRATED POWER MODULE C4 - GREEN 16 WAY.......................348
INTEGRATED POWER MODULE C5 - GRAY 26 WAY ........................348
INTEGRATED POWER MODULE C6 - GRAY 12 WAY ........................349
INTEGRATED POWER MODULE C7 - GRAY 10 WAY ........................349
INTEGRATED POWER MODULE C8 - WHITE 15 WAY .......................349
INTEGRATED POWER MODULE C9 - BLUE 26 WAY ........................350
KNOCK SENSOR - BLACK 2 WAY ........................................350
MANIFOLD ABSOLUTE PRESSURE SENSOR - GRAY 3 WAY .................350
MANIFOLD TUNING VALVE SOLENOID - DK. GRAY 2 WAY...................351
NATURAL VACUUM LEAK DETECTION ASSEMBLY - BLACK 3 WAY ...........351
OXYGEN SENSOR-1/1 UPSTREAM - BLACK 4 WAY.........................351
OXYGEN SENSOR-1/2 DOWNSTREAM - WHITE 4 WAY......................351
POWERTRAIN CONTROL MODULE C1 - BLACK/BLACK 38 WAY ..............352
POWERTRAIN CONTROL MODULE C2 - BLACK/ORANGE 38 WAY ............353
POWERTRAIN CONTROL MODULE C3 - BLACK/WHITE 38 WAY ..............354
POWERTRAIN CONTROL MODULE C4 - BLACK/GREEN 38 WAY..............355
RADIATOR FAN MOTOR NO. 1 - BLACK 2 WAY.............................355
RADIATOR FAN MOTOR NO. 2 - BLACK 2 WAY.............................356
RADIATOR FAN RELAY - BLACK 4 WAY ...................................356
SHORT RUNNER VALVE SOLENOID - GRAY 2 WAY.........................356
SKREEM MODULE - BLACK 6 WAY.......................................356
SPEED CONTROL SERVO - BLACK 4 WAY ................................357
SPEED CONTROL SWITCH-LEFT - BLACK 3 WAY ..........................357
SPEED CONTROL SWITCH-RIGHT - BLACK 3 WAY .........................357
THROTTLE POSITION SENSOR - GRAY 3 WAY ............................357
10.0 SCHEMATIC DIAGRAMS................................................359
10.1 2004 CS 3.5L.....................................................359
10.2 2004 CS 3.5L.....................................................360
10.3 2004 CS 3.5L.....................................................361
11.0 CHARTS AND GRAPHS ................................................363
vi

NOTE (NGC)
The 2004 CS is equipped with the Powertrain
Control Module and Transmission Control
Module combined in a single control module.
This module is the Next Generation
Controller (NGC) for DaimlerChrysler and will
be referred to as the Powertrain Control
Module (PCM).
The PCM has four color coded connectors C1
through C4, (C1 - BLK, C2 - ORANGE, C3 -
WHITE, C4 - GREEN), with each connector
containing 38 pins.
Two tools are required to diagnose and repair
the PCM terminals and harness connectors:
1. Miller #3638 Terminal Removal Pick must
be used to release the connector
terminals or harness and connector
damage will occur.
2. Miller #8815 Pinout Box must be used to
probe the PCM terminals or terminal
damage will occur.
1.0 INTRODUCTION
The procedures contained in this manual include
specifications, instructions, and graphics needed to
diagnose the PCM Powertrain System. The diag-
nostics in this manual are based on the failure
condition or symptom being present at time of
diagnosis.
Please follow the recommendations below when
choosing your diagnostic path.
1. First make sure the DRBIIItis communicating
with the appropriate modules; ie., if the DRBIIIt
displays a No Response condition, you must
diagnose this first before proceeding.
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 system
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 information for the proper removal and
repair procedure.
Diagnostic procedures change every year. New
diagnostic systems may be added; carryover sys-
tems may be enhanced. READ THIS DIAGNOSTIC
INFORMATION BEFORE TRYING TO DIAG-
NOSE A VEHICLE CODE. It is recommended that
you review the entire diagnostic information to
become familiar with all new and changed diagnos-
tic procedures.
If you have any comments or recommendations
after reviewing the diagnostic information, please
fill out the form at the back of the book and mail it
back to us.
1.1 SYSTEM COVERAGE
This diagnostic procedures manual covers the
2004 CS vehicle equipped with the 3.5L engine.
1.2 SIX-STEP TROUBLESHOOTING
PROCEDURE
Diagnosis of the powertrain control module
(PCM) 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 Powertrain Control Module (PCM) monitors
and controls:
•Fuel System
•Idle Air Control System
•Ignition System
•Charging System
•Speed Control System
•Cooling system
1
GENERAL INFORMATION