Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1997.1999-2001 Approved 2001 XJ Jeep Cherokee 01XJET
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TABLE OF CONTENTS
1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.1 SIX-STEP TROUBLESHOOTING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . .1
2.0 IDENTIFICATION OF SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3.0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION . . . . . . . . . . . . . . . . . . . . . .1
3.1 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3.2 FUNCTIONAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3.3 DIAGNOSTIC TROUBLE CODES (DTC'S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
3.3.1 HARD CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
3.3.2 INTERMITTENT CODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
3.3.3 STARTS SINCE SET COUNTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
3.3.4 TROUBLE CODE ERASURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3.3.5 LIST OF DIAGNOSTIC TROUBLE CODES. . . . . . . . . . . . . . . . . . . . . . . .3
3.4 INPUT SPEED SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3.5 OUTPUT SPEED SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3.6 TRANSMISSION RANGE SENSOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3.7 THROTTLE POSITION SENSOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.8 TRANSMISSION CONTROL MODULE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.8.1 COMMUNICATIONS TO PCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.8.2 OPERATING VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.8.3 SHIFT SOLENOIDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.8.4 FUNCTIONAL FAULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.9 USING THE DRBIII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.9.1 DRBIII ERROR MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.9.2 DRBIII DOES NOT POWER UP (BLANK SCREEN). . . . . . . . . . . . . . . .4
3.9.3 DISPLAY IS NOT VISIBLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.0 DISCLAIMERS, SAFETY, WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.1 DISCLAIMERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.2 SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.2.1 TECHNICIAN SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.2.2 VEHICLE PREPARATION FOR TESTING. . . . . . . . . . . . . . . . . . . . . . . . .5
4.2.3 SERVICING SUB-ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.2.4 DRBIII SAFETY INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.3 WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.3.1 VEHICLE DAMAGE WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.3.2 ROAD TEST COMPLAINT VEHICLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.3.3 BULLETINS AND RECALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5.0 REQUIRED TOOLS AND EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
6.0 GLOSSARY OF TERMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
6.1 ACRONYMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
6.2 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
i
TABLE OF CONTENTS - Continued
7.0 DIAGNOSTIC INFORMATION AND PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
COMMUNICATION
*NO RESPONSE FROM TRANSMISSION CONTROL MODULE . . . . . . . . . . . . . . . . .10
TRANSMISSION
P0122-THROTTLE POSITION SENSOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
P0562-TRANSMISSION VOLTAGE LOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
P0563-TRANSMISSION VOLTAGE HIGH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
P0705-RANGE SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
P0715-INPUT SPEED SENSOR ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
P0720-OUTPUT SHAFT SPEED SENSOR ERROR. . . . . . . . . . . . . . . . . . . . . . . . . . . .30
P0740-SOLENOID C FUNCTIONAL FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
P0751-SOLENOID A FUNCTION FAULT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
P0756-SOLENOID B FUNCTIONAL FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
P1694-CCD MESSAGE FROM JTEC FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
P1718-EEPROM FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
P1742-ROM CHECKSUM ERROR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
P1743-RAM TEST FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
P1744-SOLENOID A SHORTED TO GROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
P1745 SOLENOID A SHORTED TO VOLTAGE OR OPEN . . . . . . . . . . . . . . . . . . . . . .51
P1746-SOLENOID B SHORTED TO GROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
P1747-SOLENOID B SHORTED TO VOLTAGE OR OPEN . . . . . . . . . . . . . . . . . . . . . .57
P1748-SOLENOID C SHORTED TO GROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
P1749-TCC SOLENOID C SHORTED TO VOLTAGE OR OPEN . . . . . . . . . . . . . . . . .63
* ENGINE STALLS WITH TRANSMISSION IN GEAR . . . . . . . . . . . . . . . . . . . . . . . . . .66
*NO BRAKE SWITCH INPUT TO TCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
*POOR SHIFT QUALITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
VERIFICATION TESTS
VERIFICATION TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
8.0 COMPONENT LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
8.1 BRAKE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
8.2 DATA LINK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
8.3 INPUT AND OUTPUT SPEED SENSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
8.4 POWERTRAIN CONTROL MODULE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
8.5 THROTTLE POSITION SENSOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
8.6 TRANSMISSION CONTROL MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
8.7 SOLENOID HARNESS ADAPTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
8.8 SOLENOIDS A, B, C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
8.9 8-WAY SOLENOID CONNECTOR/8-WAY TRANSMISSION RANGE SENSOR
CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
8.10 TRANSMISSION RANGE SENSOR/8-WAY HARNESS LOCATION . . . . . . . . . .74
9.0 CONNECTOR PINOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
BRAKE LAMP SWITCH - GRAY 6 WAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
C100 (LHD) - BLACK (HEADLAMP AND DASH SIDE) . . . . . . . . . . . . . . . . . . . . . . . . .76
C100 (LHD) - BLACK (INSTRUMENT PANEL SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . .77
C100 (RHD) - WHITE (HEADLAMP AND DASH SIDE) . . . . . . . . . . . . . . . . . . . . . . . . .78
C100 (RHD) - WHITE (INSTRUMENT PANEL SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . .79
C107 (LHD GAS) - BLACK (ENGINE SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
ii
TABLE OF CONTENTS - Continued
C107 (LHD GAS) - BLACK (HEADLAMP AND DASH SIDE) . . . . . . . . . . . . . . . . . . . . .80
C107 (RHD GAS) - BLACK (ENGINE SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
C107 (RHD GAS) - BLACK (HEADLAMP AND DASH SIDE). . . . . . . . . . . . . . . . . . . . .81
C201 (LHD) - NATURAL (INSTRUMENT PANEL SIDE) . . . . . . . . . . . . . . . . . . . . . . . . .82
C201 (LHD) - NATURAL (LOWER INSTRUMENT PANEL SIDE) . . . . . . . . . . . . . . . . .83
DATA LINK CONNECTOR - BLACK 16 WAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
INPUT SPEED SENSOR CONNECTOR - 2 WAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
LEFT BACK-UP LAMP - GRAY 2 WAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
OUTPUT SPEED SENSOR CONNECTOR - 2 WAY . . . . . . . . . . . . . . . . . . . . . . . . . . .84
FUSES (DIESEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
FUSES (PDC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
POWERTRAIN CONTROL MODULE C1 (GAS) - BLACK 32 WAY . . . . . . . . . . . . . . . .89
POWERTRAIN CONTROL MODULE C2 (GAS) - WHITE 32 WAY . . . . . . . . . . . . . . . .90
POWERTRAIN CONTROL MODULE C3 (GAS) - GRAY 32 WAY . . . . . . . . . . . . . . . . .91
RIGHT BACK-UP LAMP - GRAY 2 WAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
THROTTLE POSITION SENSOR - WHITE 3 WAY. . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
TRANSMISSION CONTROL MODULE - BLACK 26 WAY . . . . . . . . . . . . . . . . . . . . . . .92
TRANSMISSION RANGE SENSOR (A/T) - BLACK 8 WAY . . . . . . . . . . . . . . . . . . . . . .92
TRANSMISSION RANGE SENSOR CONNECTOR - 8 WAY (TRANS HARNESS
SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
TRANSMISSION SOLENOID - 8 WAY (TRANS SIDE). . . . . . . . . . . . . . . . . . . . . . . . . .93
TRANSMISSION SOLENOID - BLACK 8 WAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
10.0 SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
10.1 SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
iii
NOTES
iv
GENERAL INFORMATION
1.0 INTRODUCTION 2.0 IDENTIFICATION OF
SYSTEM
The procedures contained in this manual include
specifications, instructions, and graphics needed to All 2001 Jeep Cherokees (XJ) vehicles equipped
diagnose the AW4 AUTOMATIC TRANSMISSION. with a 4.0 liter engine and automatic transmission
The diagnostics in this manual are based on the have an AW4 electronic transmission.
failure condition or symptom being present at the
time of diagnosis.
Please follow the recommendations below when 3.0 SYSTEM DESCRIPTION AND
choosing your diagnostic path. FUNCTIONAL OPERATION
1. First make sure the DRBIII is communicating
with the appropriate modules; ie., if the DRBIII
displays a "No Response" condition, you must 3.1 GENERAL DESCRIPTION
diagnose this first before proceeding.
The AW4 electronic transmission is a conven-
2. Read DTC's (diagnostic trouble codes) with the
tional transmission in that it uses hydraulically
DRBIII .
applied clutches to shift a planetary gear train.
3. If no DTC's are present, identify the customer However, the electronic control system replaces
complaint. many of the mechanical and hydraulic components
4. Once the DTC or customer complaint is identi- used in conventional transmission valve bodies.
fied, locate the matching test in the Table of The AW4 transmission control system has im-
Contents and begin to diagnose the symptom. proved significantly since it's introduction. The
All component location views are in Section 8.0. Park/Neutral switch was replaced by a Transmis-
All connector pinouts are in Section 9.0. All system sion Range Sensor (TRS). The Transmission Con-
schematics are in section 10.0. trol Module (TCM) now has the ability to commu-
An * placed before the symptom description indi- nicate with the Powertrain Control Module (PCM)
cates a customer complaint. via the CCD Bus. The TCM also has the ability to
When repairs are required, refer to the appropri- monitor transmission faults which could affect
ate service manual for the proper removal and emissions. Any transmission fault which will ad-
repair procedure. versely affect emissions will set a DTC in the PCM
Diagnostic procedures change every year. New and will also illuminate the MIL.
diagnostic systems may be added; carryover sys- An Input Speed Sensor (ISS) was added to the
tems may be enhanced. READ THIS MANUAL control system. This gives improved functional
BEFORE TRYING TO DIAGNOSE A VEHICLE trouble detection. This results in a new Diagnostic
CODE. It is recommended that you review the Trouble Code (DTC) to detect ISS malfunctions. The
entire manual to become familiar with all new and "Solenoid A or TCC Solenoid Functional Fault" DTC
changed diagnostic procedures. was separated into two DTC's "Shift solenoid A
After using this book, if you have any comments functional fault" and "TCC solenoid C functional
or recommendations, please fill out the form at the fault" and there was also a new DTC for internal
back of the book and mail it back to us. TCM failures.
1.1 SIX-STEP TROUBLESHOOTING 3.2 FUNCTIONAL OPERATION
PROCEDURE
The AW4 system performs it's functions based on
Diagnosis of the AW4 electronic transmission continuous real-time sensor feedback information.
system is done in six basic steps: The Transmission Control Module (TCM) continu-
ously checks for electrical problems, some mechan-
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