Table of Contents
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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
TEVES MARK 20I SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.1.7
3.2
DIAGNOSTIC TROUBLE CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.2.1
3.2.2
3.2.3
3.3
AXLE LOCK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.3.1
3.3.2
3.4
USING THE DRBIII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.5
DRBIII ERROR MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.5.1
3.5.2
4.0
DISCLAIMERS, SAFETY WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.1
DISCLAIMERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
4.2
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.2.1
4.2.2
4.2.3
4.2.4
4.3
WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.3.1
4.3.2
4.4
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5.0
REQUIRED TOOLS AND EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
6.0
GLOSSARY OF TERMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
7.0
DIAGNOSTIC INFORMATION AND PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
BRAKES (CAB)
CAB POWER FEED CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
CONTROLLER FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
G-SWITCH NOT PROCESSABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
LEFT FRONT SENSOR CIRCUIT FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
LEFT REAR SENSOR CIRCUIT FAILURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
TABLE OF CONTENTS
PEDAL FEEL/VEHICLE CHARACTERISTICS. . . . . . . . . . . . . . . . . . . . .2
SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
ABS AND BRAKE WARNING INDICATORS. . . . . . . . . . . . . . . . . . . . . .2
CONTROLLER ANTILOCK BRAKE (CAB) . . . . . . . . . . . . . . . . . . . . . . .2
HYDRAULIC CONTROL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
RELAYS/SWITCHES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
SYSTEM INITIALIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
DIAGNOSTIC MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
INTERMITTENT DIAGNOSTIC TROUBLE CODES . . . . . . . . . . . . . . . .4
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
DRBIII DOES NOT POWER UP (BLANK SCREEN) . . . . . . . . . . . . . .5
DISPLAY IS NOT VISIBLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
TECHNICIAN SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . .6
VEHICLE PREPARATION FOR TESTING. . . . . . . . . . . . . . . . . . . . . . . .6
SERVICING SUB-ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
DRBIII SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
VEHICLE DAMAGE WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
ROAD TESTING A COMPLAINT VEHICLE . . . . . . . . . . . . . . . . . . . . . . .7
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Summary of Contents for Jeep Wrangler TJ 2003
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Page 1: Table Of Contents
TABLE OF CONTENTS INTRODUCTION ............1 SYSTEM COVERAGE . - Page 2 TABLE OF CONTENTS - Continued RIGHT FRONT SENSOR CIRCUIT FAILURE ....... . .19 RIGHT REAR SENSOR CIRCUIT FAILURE .
- Page 3 TABLE OF CONTENTS - Continued 10.0 SCHEMATIC DIAGRAMS..........61 10.1 TEVES MARK 20I CONTROLLER ANTILOCK BRAKE - ABS .
- Page 4 NOTES...
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Page 5: Introduction
During an antilock stop, ‘‘wheel lock-up’’ does not 20i Antilock Braking System (ABS) found on the necessarily mean that the wheel has locked, it Jeep Wrangler. Diagnosis of the Axle Lock is cov- means only that the wheel is turning slower than ered in this manual. -
Page 6: Pedal Feel/Vehicle Characteristics
GENERAL INFORMATION 3.1.1 PEDAL FEEL/VEHICLE • fuses and wiring harness • fluid reservoir (integral part of master cylinder CHARACTERISTICS assembly) There are several pedal feel/vehicle characteris- tics that are considered normal for antilock braking 3.1.3 ABS AND BRAKE WARNING that may require further explanation. INDICATORS When stopping conditions activate the antilock brakes, the driver may feel some vibrations/... -
Page 7: Hydraulic Control Unit
GENERAL INFORMATION The CAB inputs include the following: Accumulators: The accumulators provide tem- porary fluid storage during an antilock stop and are • four wheel speed sensors drained by the pump/motor. • brake lamp switch • ignition switch 3.1.6 RELAYS/SWITCHES •... -
Page 8: Diagnostic Trouble Codes
GENERAL INFORMATION 3.2 DIAGNOSTIC TROUBLE CODES blinking and limited diagnostic operations only will be available until the diagnostic trouble code condition is corrected. The Teves Mark 20i Antilock Brake System (ABS) module may report any of the following diagnostic • Antilock operation is disabled. -
Page 9: Using The Drbiii
GENERAL INFORMATION ward press of the axle lock switch will operate the ver: 2.14 front locker relay and front locker pump. The first date: 26 Jul93 downward press on the axle lock switch locks the file: key_itf.cc rear axle, the second downward press locks the date: Jul 26 1993 front axle (rear is still locked), the third downward line: 548... -
Page 10: Safety
GENERAL INFORMATION information available at the time of publication. • Do not use the DRBIII if it has been damaged. The right is reserved to make changes at any time • Do not use the test leads if the insulation is without notice. -
Page 11: Road Testing A Complaint Vehicle
GENERAL INFORMATION Be careful when performing electrical tests so as test. If a problem with the ABS warning indica- to prevent accidental shorting of terminals. Such tor exists, refer to the appropriate test. mistakes can damage fuses or components. Also, a 6. -
Page 12: Glossary Of Terms
GENERAL INFORMATION 6.0 GLOSSARY OF TERMS JBLK junction block JTEC Jeep and Truck Engine Controller antilock brake system left front alternating current left rear Body Control Module Powertrain Control Module controller antilock brake power distribution center Chrysler Collision Detection pump motor... -
Page 13: Diagnostic Information And Procedures
DIAGNOSTIC INFORMATION AND PROCEDURES... -
Page 14: Cab Power Feed Circuit
BRAKES (CAB) Symptom: CAB POWER FEED CIRCUIT When Monitored and Set Condition: CAB POWER FEED CIRCUIT When Monitored: Ignition on. The CAB monitors the Fused B(+) circuit at all times for proper system voltage. Set Condition: If the Fused B(+) voltage is missing when the CAB detects that an internal main driver is not on , the Diagnostic Trouble Code (DTC) is set. - Page 15 BRAKES (CAB) CAB POWER FEED CIRCUIT — Continued TEST ACTION APPLICABILITY Turn the ignition off. Remove Fuse 12 from the PDC. Disconnect the CAB harness connector. Note: Check connector - Clean/repair as necessary. Using a test light connected to 12 volts, probe the Fused B(+) Circuit. Does the test light illuminate brightly? Yes →...
- Page 16 BRAKES (CAB) CAB POWER FEED CIRCUIT — Continued TEST ACTION APPLICABILITY Turn the ignition off. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
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Page 17: Controller Failure
BRAKES (CAB) Symptom: CONTROLLER FAILURE When Monitored and Set Condition: CONTROLLER FAILURE When Monitored: Ignition on. The CAB monitors its internal microprocessors for correct operation. Set Condition: If the CAB detects an internal fault, the DTC is set. POSSIBLE CAUSES GROUND AND POWER CONNECTIONS GROUND CIRCUIT HIGH RESISTANCE GROUND CIRCUIT INTERFERENCE... - Page 18 BRAKES (CAB) CONTROLLER FAILURE — Continued TEST ACTION APPLICABILITY If there are no possible causes remaining, view repair. Repair Replace the CAB. Perform ABS VERIFICATION TEST - VER 1.
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Page 19: G-Switch Not Processable
BRAKES (CAB) Symptom: G-SWITCH NOT PROCESSABLE When Monitored and Set Condition: G-SWITCH NOT PROCESSABLE When Monitored: Ignition on. The CAB sends a test signal out to the G-switch and monitors the sense circuits #1 and #2. Set Condition: If the sense circuits are open for 2 minutes while driving or an otherwise improper signal is detected at any time, the Diagnostic Trouble Code (DTC) is set. - Page 20 BRAKES (CAB) G-SWITCH NOT PROCESSABLE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
- Page 21 BRAKES (CAB) G-SWITCH NOT PROCESSABLE — Continued TEST ACTION APPLICABILITY If there are no potential causes remaining, view repair. Repair Replace the CAB. Perform ABS VERIFICATION TEST - VER 1. Turn the ignition off. Disconnect the CAB Connector. Note: Check connector - Clean/repair as necessary. Disconnect the G-Switch Sensor Connector.
- Page 22 BRAKES (CAB) G-SWITCH NOT PROCESSABLE — Continued TEST ACTION APPLICABILITY If there are no potential causes remaining, view repair. Repair Replace the CAB. Perform ABS VERIFICATION TEST - VER 1.
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Page 23: Left Front Sensor Circuit Failure
BRAKES (CAB) Symptom List: LEFT FRONT SENSOR CIRCUIT FAILURE LEFT REAR SENSOR CIRCUIT FAILURE RIGHT FRONT SENSOR CIRCUIT FAILURE RIGHT REAR SENSOR CIRCUIT FAILURE Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be LEFT FRONT SENSOR CIRCUIT FAILURE. - Page 24 BRAKES (CAB) LEFT FRONT SENSOR CIRCUIT FAILURE — Continued POSSIBLE CAUSES WHEEL SPEED SENSOR (+) OR (-) CIRCUIT SHORTED TO GROUND WHEEL SPEED SENSOR CIRCUITS SHORTED TOGETHER SPEED SENSOR (+) OR (-) CIRCUIT OPEN CAB - INTERNAL SHORT OR OPEN TEST ACTION APPLICABILITY...
- Page 25 BRAKES (CAB) LEFT FRONT SENSOR CIRCUIT FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the affected Wheel Speed Sensor Connector. Disconnect the CAB Connector. Measure the resistance between the Wheel Speed Sensor (+) and (-) circuits and ground.
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Page 26: Left Front Sensor Signal Failure
BRAKES (CAB) Symptom List: LEFT FRONT SENSOR SIGNAL FAILURE LEFT REAR SENSOR SIGNAL FAILURE RIGHT FRONT SENSOR SIGNAL FAILURE RIGHT REAR SENSOR SIGNAL FAILURE Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be LEFT FRONT SENSOR SIGNAL FAILURE. - Page 27 BRAKES (CAB) LEFT FRONT SENSOR SIGNAL FAILURE — Continued POSSIBLE CAUSES SPEED SENSOR OR CONNECTOR DAMAGED TONE WHEEL DAMAGED WHEEL SPEED SENSOR AIR GAP OUT OF SPECIFICATION WHEEL BEARING EXCESS RUNOUT WHEEL SPEED SENSOR INOPERATIVE CAB - CAN’T READ WHEEL SPEED SENSOR SIGNAL INTERMITTENT SIGNAL DTC TEST ACTION...
- Page 28 BRAKES (CAB) LEFT FRONT SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Inspect the wheel bearing for excessive runout or clearance. Note: Refer to the appropriate service information, if necessary, for proce- dures or specifications. Is the bearing runout OK ? Yes →...
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Page 29: Pump Motor Not Working Properly
BRAKES (CAB) Symptom: PUMP MOTOR NOT WORKING PROPERLY When Monitored and Set Condition: PUMP MOTOR NOT WORKING PROPERLY When Monitored: Ignition on. The CAB commands the pump on at 20 km/h (12 mph) to check its operation, if the brake switch is not applied. If the driver has their foot on the brake, the test will run at 40 km/h (25 mph). - Page 30 BRAKES (CAB) PUMP MOTOR NOT WORKING PROPERLY — Continued TEST ACTION APPLICABILITY Turn the ignition off. Make sure the Pump Motor connector is secure. Visually inspect the Fused B(+) Circuit in the wiring harness from the PDC to the CAB. Look for any sign of an Intermittent Short to Ground. Is the wiring harness OK? Yes →...
- Page 31 BRAKES (CAB) PUMP MOTOR NOT WORKING PROPERLY — Continued TEST ACTION APPLICABILITY Turn the ignition off. Remove ABS PUMP Fuse #12 from the Power Distribution Center (PDC). Disconnect the CAB connector. Note: Check connector - Clean/repair as necessary. Measure the resistance of the Fused B (+) circuit between the PDC Fuse Terminal and the CAB connector.
- Page 32 BRAKES (CAB) PUMP MOTOR NOT WORKING PROPERLY — Continued TEST ACTION APPLICABILITY Make sure the Pump Motor connector is secure. Turn the ignition on. With the DRBIII , enable pump motor actuation. NOTE: Pump motor will not operate, but voltage will be applied. Measure the voltage drop across the ABS ground circuit connection, with pump motor actuation enabled.
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Page 33: System Over Voltage
BRAKES (CAB) Symptom: SYSTEM OVER VOLTAGE When Monitored and Set Condition: SYSTEM OVER VOLTAGE When Monitored: Ignition on. The CAB monitors the Fused B(+) circuit at all times for proper system voltage. Set Condition: If the voltage is above 16.5 volts, the Diagnostic Trouble Code (DTC) is set. POSSIBLE CAUSES BATTERY OVERCHARGED FUSED IGNITION SWITCH OUTPUT HIGH... - Page 34 BRAKES (CAB) SYSTEM OVER VOLTAGE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the CAB connector. Note: Check connector - Clean/repair as necessary. Start the engine. Raise engine RPM’s above 1,800. Measure the battery voltage. Is the voltage above 16.5 volts ? Yes →...
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Page 35: System Under Voltage
BRAKES (CAB) Symptom: SYSTEM UNDER VOLTAGE When Monitored and Set Condition: SYSTEM UNDER VOLTAGE When Monitored: Ignition on. The CAB monitors the Fused Ignition Switch Output for proper system voltage. Set Condition: If the voltage is below 9.5 volts, the Diagnostic Trouble Code (DTC) is set. POSSIBLE CAUSES BATTERY VOLTAGE LOW INTERMITTENT DTC... - Page 36 BRAKES (CAB) SYSTEM UNDER VOLTAGE — Continued TEST ACTION APPLICABILITY Disconnect the CAB harness connector. Turn the ignition on. Measure the voltage of the Fused Ignition Switch circuit. Is the voltage above 10 volts? Yes → Go To 5 → Repair the Fused Ignition Switch Output Circuit for high resis- tance Perform ABS VERIFICATION TEST - VER 1.
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Page 37: Abs Warning Indicator Always On
BRAKES (CAB) Symptom: *ABS WARNING INDICATOR ALWAYS ON POSSIBLE CAUSES ABS RELAY STUCK ABS RELAY FUSED B+ CIRCUIT OPEN ABS RELAY CONTROL CIRCUIT OPEN CAB INTERNAL OPEN ABS INDICATOR DRIVER SHORT TO GROUND INSTRUMENT CLUSTER CONCERN TEST ACTION APPLICABILITY Remove the ABS relay from PDC. Perform the key-on bulb test. - Page 38 BRAKES (CAB) *ABS WARNING INDICATOR ALWAYS ON — Continued TEST ACTION APPLICABILITY Remove the ABS relay from the PDC. Turn the ignition on. Using a 12-volt test light connected to ground, check the Fused B+ circuit. Does the test light illuminate? Yes →...
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Page 39: Abs Warning Indicator Inoperative
BRAKES (CAB) Symptom: *ABS WARNING INDICATOR INOPERATIVE POSSIBLE CAUSES INSTRUMENT CLUSTER CONCERN ABS RELAY STUCK ABS RELAY GROUND CIRCUIT OPEN ABS RELAY CONTROL CIRCUIT SHORT TO GROUND CAB INTERNAL SHORT TO GROUND ABS INDICATOR BULB OPEN ABS INDICATOR DRIVER OPEN INSTRUMENT CLUSTER INTERNAL OPEN TEST ACTION... - Page 40 BRAKES (CAB) *ABS WARNING INDICATOR INOPERATIVE — Continued TEST ACTION APPLICABILITY Remove the ABS relay. Disconnect the CAB harness connector. Using a 12-volt test light connected to 12-volts, check the ABS Relay Control circuit. Does the test light illuminate? Yes → Repair the ABS Relay Control circuit for a short to ground. Perform ABS VERIFICATION TEST - VER 1.
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Page 41: Brake Lamp Switch
BRAKES (CAB) Symptom: *BRAKE LAMP SWITCH POSSIBLE CAUSES CHECK BRAKE LAMP SWITCH OUTPUT BRAKE LAMP SWITCH B+ OPEN BRAKE LAMP SWITCH OUTPUT CIRCUIT SHORT OR OPEN BRAKE LAMP SWITCH OPEN CAB -- INTERNAL OPEN TEST ACTION APPLICABILITY With the DRBIII in Inputs/Outputs, read the Brake Lamp Switch state. Press and release the brake pedal. -
Page 42: Front Axle Lock Indicator Remains Flashing
BRAKES (CAB) Symptom: *FRONT AXLE LOCK INDICATOR REMAINS FLASHING POSSIBLE CAUSES CHECKING OPERATION INTERMITTENT CONDITION FUSED B(+) CIRCUIT OPEN TO THE FRONT LOCKER RELAY FRONT LOCKER RELAY FRONT LOCKER RELAY OUTPUT CIRCUIT OPEN FRONT LOCKER PUMP GROUND CIRCUIT OPEN FRONT LOCKER PUMP FRONT LOCKER INDICATOR SWITCH SENSE CIRCUIT OPEN FRONT LOCKER INDCATOR SWITCH GROUND CIRCUIT OPEN MECHANICAL FAULT EXISTS... - Page 43 BRAKES (CAB) *FRONT AXLE LOCK INDICATOR REMAINS FLASHING — Continued TEST ACTION APPLICABILITY Measure the resistance of the Front Locker Relay Output circuit between the PDC connector and the Front Locker Pump connector. Is the resistance above 5.0 ohms? Yes → Repair the Front Locker Relay Output circuit for an open. Perform BODY VERIFICATION TEST - VER 1.
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Page 44: Response From Controller Antilock Brake
BRAKES (CAB) Symptom List: *NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE POSSIBLE CAUSES ATTEMPT TO COMMUNICATE WITH THE PCM CHECK FUSE #7 IN FUSE BLOCK OPEN GROUND CIRCUITS OPEN FUSED IGNITION SWITCH OUTPUT CIRCUIT SCI TRANSMIT CIRCUIT OPEN CONTROLLER ANTILOCK BRAKE TEST ACTION APPLICABILITY... - Page 45 BRAKES (CAB) *NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the CAB harness connector. Measure the resistance of the SCI Transmit circuit between the CAB connector and the DLC. Is the resistance below 5.0 ohms? Yes →...
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Page 46: Rear Axle Lock Indicator Remains Flashing
BRAKES (CAB) Symptom: *REAR AXLE LOCK INDICATOR REMAINS FLASHING POSSIBLE CAUSES CHECKING OPERATION INTERMITTENT CONDITION OPEN FUSE IN PDC FUSED B(+) CIRCUIT OPEN TO THE REAR LOCKER RELAY REAR LOCKER RELAY REAR LOCKER RELAY OUTPUT CIRCUIT OPEN REAR LOCKER PUMP GROUND CIRCUIT OPEN REAR LOCKER PUMP REAR LOCKER INDICATOR SWITCH SENSE CIRCUIT OPEN REAR LOCKER INDCATOR SWITCH GROUND CIRCUIT OPEN... - Page 47 BRAKES (CAB) *REAR AXLE LOCK INDICATOR REMAINS FLASHING — Continued TEST ACTION APPLICABILITY Turn the ignition off. Replace the Rear Locker Relay with a known good part. Turn the ignition on. Ensure Transfer Case is in 4 LOW range. Depress the Axle Lock Switch once. Did the Rear Locker Pump turn ON? Yes →...
- Page 48 BRAKES (CAB) *REAR AXLE LOCK INDICATOR REMAINS FLASHING — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the Rear Locker Indicator Switch harness connector. Measure the resistance between ground and the Rear Locker Indicator Switch Ground circuit. Is the resistance above 5.0 ohms? Yes →...
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Page 49: Rear Axle Lock Inoperative
BRAKES (CAB) Symptom: *REAR AXLE LOCK INOPERATIVE POSSIBLE CAUSES CHECKING OPERATION INSTRUMENT CLUSTER NOT PROPERLY CONFIGURED VSS, PCM, OR TRANSFER CASE DTC’S PRESENT OPEN FUSE IN PDC AXLE LOCK SWITCH GROUND CIRCUIT OPEN FUSED B(+) CIRCUIT OPEN TO AXLE LOCK SWITCH AXLE LOCK SWITCH FAILURE TEST ACTION... - Page 50 BRAKES (CAB) *REAR AXLE LOCK INOPERATIVE — Continued TEST ACTION APPLICABILITY Inspect Fuse 26 in the PDC. Is the Fuse open, missing, or loose? Yes → Replace the open or missing fuse. If the fuse is open make sure to check for a short to ground in the Fused B(+) circuit from the fuse to the switch.
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Page 51: Verification Tests
VERIFICATION TESTS Verification Tests ABS VERIFICATION TEST - VER 1 APPLICABILITY 1. Turn the ignition off. 2. Connect all previously disconnected components and connectors. 3. Ensure all accessories are turned off and the battery is fully charged. 4. Ensure that the Ignition is on, and with the DRBIII, erase all Diagnostic Trouble Codes from ALL modules. - Page 52 NOTES...
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Page 53: Component Locations
COMPONENT LOCATIONS 8.0 COMPONENT LOCATIONS 8.1 CONTROLLER ANTILOCK BRAKE 8.2 DATA LINK CONNECTOR 8.3 G-SWITCH... -
Page 54: Fuses & Relays
COMPONENT LOCATIONS 8.4 FUSES & RELAYS 8.5 WHEEL SPEED SENSORS FRONT REAR DRUM BRAKES 8.6 WHEEL SPEED SENSOR CONNECTORS LEFT FRONT RIGHT FRONT... -
Page 55: Brake Switches
COMPONENT LOCATIONS REAR 8.7 BRAKE SWITCHES 8.7.1 PARKING BRAKE 8.7.2 BRAKE SWITCH... - Page 56 NOTES...
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Page 57: Connector Pinouts
CONNECTOR PINOUTS 9.0 CONNECTOR PINOUTS AXLE LOCK SWITCH (OFF-ROAD PACKAGE) CIRCUIT FUNCTION Z1 20BK GROUND E2 20OR PANEL LAMPS FEED M1 20PK/WT FUSED B(+) G302 20RD/WT LOCKER ENABLE SIGNAL 1 G303 20VT/DG LOCKER ENABLE SIGNAL 2 G305 20VT/LG REAR LOCKER REQUEST G304 20VT/DB FRONT LOCKER REQUEST BRAKE LAMP SWITCH... -
Page 58: Data Link Connector
CONNECTOR PINOUTS DATA LINK CONNECTOR CIRCUIT FUNCTION D25 20VT/YL PCI BUS Z2 20BK/LG GROUND Z12 20BK/TN GROUND D32 20LG/WT SCI RECEIVE D21 20PK SCI TRANSMIT D20 20LG/PK SCI RECEIVE M1 20PK/WT FUSED B(+) FRONT LOCKER INDICATOR SWITCH (OFF-ROAD PACKAGE) CIRCUIT FUNCTION Z1 20BK GROUND... -
Page 59: G-Switch (Lhd)
CONNECTOR PINOUTS G-SWITCH (LHD) CIRCUIT FUNCTION B42 20TN/WT G-SWITCH NO. 2 SENSE B41 20YL/VT G-SWITCH NO. 1 SENSE B43 20PK/OR G-SWITCH TEST SIGNAL INSTRUMENT CLUSTER C1 CIRCUIT FUNCTION L61 18GY LEFT TURN SIGNAL L60 18TN RIGHT TURN SIGNAL G34 16RD/GY (LHD) HIGH BEAM INDICATOR DRIVER L3 16RD/OR (RHD) HIGH BEAM INDICATOR DRIVER... -
Page 60: Left Front Wheel Speed Sensor
CONNECTOR PINOUTS LEFT FRONT WHEEL SPEED SENSOR CIRCUIT FUNCTION B8 18RD/DB LEFT FRONT WHEEL SPEED SENSOR (-) B9 18RD LEFT FRONT WHEEL SPEED SENSOR (+) LEFT REAR WHEEL SPEED SENSOR CIRCUIT FUNCTION B3 18LG/DB LEFT REAR WHEEL SPEED SENSOR (-) B4 18LG LEFT REAR WHEEL SPEED SENSOR (+) - Page 61 CONNECTOR PINOUTS...
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Page 62: Front Locker Relay (Off-Road Package)
CONNECTOR PINOUTS FRONT LOCKER RELAY (OFF-ROAD PACKAGE) CIRCUIT FUNCTION A88 18RD/DB FUSED B(+) G304 20VT/DB FRONT LOCKER REQUEST A88 18RD/DB FUSED B(+) A750 18TN/RD FRONT LOCKER RELAY OUTPUT REAR LOCKER RELAY (OFF-ROAD PACKAGE) CIRCUIT FUNCTION A88 18RD/DB FUSED B(+) A88 18RD/DB FUSED B(+) G305 20VT/LG REAR LOCKER REQUEST... -
Page 63: Right Front Wheel Speed Sensor
CONNECTOR PINOUTS RIGHT FRONT WHEEL SPEED SENSOR CIRCUIT FUNCTION B6 18WT/DB RIGHT FRONT WHEEL SPEED SENSOR (-) B7 18WT RIGHT FRONT WHEEL SPEED SENSOR (+) RIGHT REAR WHEEL SPEED SENSOR CIRCUIT FUNCTION B1 18YL/DB RIGHT REAR WHEEL SPEED SENSOR (-) B2 18YL RIGHT REAR WHEEL SPEED SENSOR (+) - Page 64 NOTES...
- Page 65 SCHEMATIC DIAGRAMS 10.0 SCHEMATIC DIAGRAMS 10.1 TEVES MARK 20I CONTROLLER ANTILOCK BRAKE - ABS...
- Page 66 SCHEMATIC DIAGRAMS 10.2 AXLE LOCK...
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I have a 2003 Jeep TJ (manual transmission), and I'm installing cruise control using a 2006 model 4-pin servo. My Jeep doesn't have the original servo wiring, and the PCM has three connectors (gray, white, and black). Could you please help me with the correct PCM pinout or wiring diagram related to cruise control for this model? It would really help me complete the installation properly. Thank you so much in advance