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 ABS SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.2
ADJUSTABLE PEDALS SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . .4
3.3
DIAGNOSTIC TROUBLE CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.3.1
3.3.2
3.3.3
3.4
3.5
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.3.1
4.3.2
4.4
5.0
REQUIRED TOOLS AND EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
6.0
GLOSSARY OF TERMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
7.0
DIAGNOSTIC INFORMATION AND PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
PEDAL SENSOR OPEN/SHORTED TO BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
PEDAL SENSOR SHORTED TO GROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
PEDAL SW STUCK FORWARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
PEDAL SW STUCK REARWARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
SYSTEM OVER VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
SYSTEM UNDER VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
*CAN'T ADJUST PEDALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
*CAN'T SET/RECALL MEMORY POSITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
TABLE OF CONTENTS
PEDAL FEEL/VEHICLES CHARACTERISTICS . . . . . . . . . . . . . . . . . . .2
SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
ABS AND RED BRAKE WARNING INDICATOR . . . . . . . . . . . . . . . . . . .2
CONTROLLER ANTILOCK BRAKE (CAB) . . . . . . . . . . . . . . . . . . . . . . .2
HYDRAULIC CONTROL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
ABS INITIALIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
DIAGNOSTIC MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
INTERMITTENT DIAGNOSTIC TROUBLE CODES . . . . . . . . . . . . . . . .5
USING THE DRBIII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
DRBIII ERROR MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
ROAD TESTING A COMPLAINT VEHICLE . . . . . . . . . . . . . . . . . . . . . . .7
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
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Table of Contents
Related Manuals for Jeep WG Grand Cherokee 2002
Summary of Contents for Jeep WG Grand Cherokee 2002
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Page 1: Table Of Contents
TABLE OF CONTENTS INTRODUCTION ............1 SYSTEM COVERAGE . - Page 2 TABLE OF CONTENTS - Continued BRAKES (CAB) BRAKE FLUID LEVEL SWITCH ..........22 CAB POWER FEED CIRCUIT .
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Page 3: Introduction
During an ABS stop, the system still uses the Antilock Braking System (ABS) and the Adjustable front/rear hydraulic split; however, the brake sys- Pedals system found on the Jeep Grand Cherokee. tem pressure is further split into three control 1.2 SIX-STEP TROUBLESHOOTING channels. -
Page 4: Pedal Feel/Vehicles Characteristics
GENERAL INFORMATION indicated as a percentage. 0% slip means that the • master cylinder (w/center valves) wheel is rolling free and 100% slip means that the • hydraulic control unit (HCU) wheel is locked. The antilock system maintains an • valve block assembly: 6 valve solenoids (3 inlet average of approximately 20% wheel slip. -
Page 5: Hydraulic Control Unit
GENERAL INFORMATION • monitor the system for proper operation wheel speed is no longer disproportionate to the other wheels, the inlet valve will return to its • provide communication to the DRBIII while in normally open position and the outlet valve will diagnostic mode return to the normally closed position. -
Page 6: Adjustable Pedals System Description
GENERAL INFORMATION Brake Warning Indicator Switch: The brake allows storing of one or two preferred pedal warning indicator switch is a fluid level sending positions in the Adjustable Pedal Module (APM). switch. The CAB sends out a 12 volt signal to the A preferred position can be stored and recalled switch. -
Page 7: Intermittent Diagnostic Trouble Codes
GENERAL INFORMATION could be displayed by the DRBIII . The following ver: 2.14 are characteristics of diagnostic mode: date: 26 Jul93 file: key_itf.cc • The amber ABS warning indicator will blink date: Jul 26 1993 rapidly (about ⁄ second on and ⁄... -
Page 8: Safety
GENERAL INFORMATION information available at the time of publication. 4.2.4 DRBIII SAFETY INFORMATION The right is reserved to make changes at any time without notice. WARNING: EXCEEDING THE LIMITS OF THE DRBIII MULTIMETER IS DANGEROUS. IT 4.2 SAFETY EXPOSE SERIOUS POSSIBLY FATAL INJURY. -
Page 9: Warning
GENERAL INFORMATION 4.3 WARNING brake switch input as your press and release the brake pedal. If the display does not match the state of the pedal, perform the proper test. For a 4.3.1 VEHICLE DAMAGE WARNINGS problem with the amber “ABS” warning indica- tor, refer to the proper test. - Page 10 Powertrain Control Module diagnostic test code power distribution center electro magnetic interference pump motor EVBP Electronic Variable Brake Propor- tioning right front hydraulic control unit right rear Hertz solenoid JBLK junction block wheel speed sensor JTEC Jeep and Truck Engine Controller...
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Page 11: Diagnostic Information And Procedures
DIAGNOSTIC INFORMATION AND PROCEDURES... -
Page 12: Adjustable Pedals
ADJUSTABLE PEDALS Symptom: PEDAL SENSOR OPEN/SHORTED TO BATTERY When Monitored and Set Condition: PEDAL SENSOR OPEN/SHORTED TO BATTERY When Monitored: Constantly. Set Condition: When the APM detects the voltage on the Sense circuit is too high. POSSIBLE CAUSES MOTOR/SENSOR SHORTED OR OPEN SENSE CIRCUIT SHORT TO BATTERY OR TO SENSOR FEED CIRCUIT APM-INTERNAL FAULT INTERMITTENT DTC... - Page 13 ADJUSTABLE PEDALS PEDAL SENSOR OPEN/SHORTED TO BATTERY — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the Adjustable Pedals Motor/Sensor harness connector. Disconnect the Adjustable Pedals Module harness connector. Note: Check connector - Clean/repair as necessary. Turn the ignition on. Check the Sense circuit for a short to battery and for a short to the Sensor Feed circuit.
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Page 14: Pedal Sensor Shorted To Ground
ADJUSTABLE PEDALS Symptom: PEDAL SENSOR SHORTED TO GROUND When Monitored and Set Condition: PEDAL SENSOR SHORTED TO GROUND When Monitored: Constantly Set Condition: When the APM detects a ground condition at the Sense circuit. POSSIBLE CAUSES MOTOR/SENSOR ASSEMBLY SHORTED TO GROUND APM-SENSE CIRCUIT GROUNDED INTERMITTENT DTC TEST... -
Page 15: Pedal Sw Stuck Forward
ADJUSTABLE PEDALS Symptom: PEDAL SW STUCK FORWARD When Monitored and Set Condition: PEDAL SW STUCK FORWARD When Monitored: Constantly Set Condition: When the Adjustable Pedals module detects battery voltage on the Adjustable Pedals Switch FWD circuit for more than 20 seconds. POSSIBLE CAUSES ADJUSTABLE PEDALS MODULE INTERNAL FAULT SWITCH FAILURE... - Page 16 ADJUSTABLE PEDALS PEDAL SW STUCK FORWARD — 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: Pedal Sw Stuck Rearward
ADJUSTABLE PEDALS Symptom: PEDAL SW STUCK REARWARD When Monitored and Set Condition: PEDAL SW STUCK REARWARD When Monitored: Constantly Set Condition: When the Adjustable Pedals module detects battery voltage on the Adjustable Pedals Switch AFT circuit for more than 20 seconds. POSSIBLE CAUSES ADJUSTABLE PEDALS MODULE INTERNAL FAULT SWITCH FAILURE... - Page 18 ADJUSTABLE PEDALS PEDAL SW STUCK REARWARD — 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 19: System Over Voltage
ADJUSTABLE PEDALS Symptom: SYSTEM OVER VOLTAGE When Monitored and Set Condition: SYSTEM OVER VOLTAGE When Monitored: Whenever the module is awake Set Condition: When the APM detects 3 consecutive J1850 Bus messages indicating vehicle voltage over 15.94 VDC. POSSIBLE CAUSES VEHICLE VOLTAGE HIGH APM -- INTERNAL FAILURE TEST... -
Page 20: System Under Voltage
ADJUSTABLE PEDALS Symptom: SYSTEM UNDER VOLTAGE When Monitored and Set Condition: SYSTEM UNDER VOLTAGE When Monitored: Any time that the module is awake. Set Condition: When the APM detects 3 consecutive J1850 Vehicle Battery Voltage messages indicating a battery voltage less than 9 VDC. POSSIBLE CAUSES VEHICLE VOLTAGE LOW APM -- INTERNAL FAILURE... -
Page 21: Can't Adjust Pedals
ADJUSTABLE PEDALS Symptom: *CAN’T ADJUST PEDALS POSSIBLE CAUSES VEHICLE IN CRUISE OR REVERSE DTC OR IN-PLANT MODE ACTIVE MOTOR/SENSOR ASSEMBLY MOTOR FWD OR AFT CIRCUIT SHORTED OR OPEN BATTERY FEED CIRCUIT OPEN ADJUSTABLE PEDALS MODULE INTERNAL FAULT ADJ PEDAL SW OPEN TEST ACTION APPLICABILITY... - Page 22 ADJUSTABLE PEDALS *CAN’T ADJUST PEDALS — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the Adjustable Pedals Motor/Sensor harness connector. Operate the Adjustable Pedals Switch to the Fwd position. On the APM side of the connector, using a 12-volt test light connected to ground, check the Fwd circuit.
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Page 23: Can't Set/Recall Memory Positions
ADJUSTABLE PEDALS Symptom: *CAN’T SET/RECALL MEMORY POSITIONS POSSIBLE CAUSES DTC OR IN-PLANT MODE ACTIVE DRIVER DOOR MODULE -- INTERNAL FAULT ADJUSTABLE PEDALS MODULE FAULT TEST ACTION APPLICABILITY With the DRBIII , erase DTCs. With the DRBIII , read the active DTCs. With the DRBIII in Inputs/Outputs, read the In-Plant state. -
Page 24: Brake Fluid Level Switch
BRAKES (CAB) Symptom: BRAKE FLUID LEVEL SWITCH When Monitored and Set Condition: BRAKE FLUID LEVEL SWITCH When Monitored: Ignition on, every 7 milliseconds (ms). Set Condition: The DTC will be set when the Brake Fluid Level Switch Sense circuit is shorted to ground (below approximately 1 volt for 70 milliseconds) or is open or shorted to voltage (above 4 volts for 70 milliseconds). - Page 25 BRAKES (CAB) BRAKE FLUID LEVEL SWITCH — Continued TEST ACTION APPLICABILITY Turn the ignition on. With the DRBIII , read Brake Fluid Level Switch voltage. What is the Voltage reading of the Brake Fluid Level Switch? Approximately 2 volts. Go To 4 Above 4 volts.
- Page 26 BRAKES (CAB) BRAKE FLUID LEVEL SWITCH — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the Brake Fluid Level Switch connector Note: Check connector - Clean/repair as necessary. Disconnect the CAB connector. Check connector - Clean/repair as necessary. Turn the ignition on. Using a 12-volt test light connected to ground, check the Brake Fluid Level Switch Sense circuit.
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Page 27: 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 28 BRAKES (CAB) CAB POWER FEED CIRCUIT — Continued TEST ACTION APPLICABILITY Turn the ignition off. Visually inspect the B(+) Circuit in the wiring harness from the Junction Block to the CAB. Look for any sign of an intermittent short to ground. Is the wiring harness OK? Yes →...
- Page 29 BRAKES (CAB) CAB POWER FEED CIRCUIT — 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. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
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Page 30: Cluster Fault
BRAKES (CAB) Symptom: CLUSTER FAULT When Monitored and Set Condition: CLUSTER FAULT When Monitored: Ignition on, every time a message is sent from the instrument cluster. Set Condition: When the message from the instrument cluster, via the PCI Bus, informs the CAB that it cannot turn on the ABS Warning Indicator or the Red Baake Warning Indicator. -
Page 31: 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 32 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 33: 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 to its internal G-Sensor and monitors the internal sense circuits. Set Condition: If the sense circuits are shorted or open for 2 minutes while driving or an otherwise improper signal is detected at any time, the Diagnostic Trouble Code (DTC) is set. -
Page 34: Left Front Sensor Circuit Failure
BRAKES (CAB) Symptom: LEFT FRONT SENSOR CIRCUIT FAILURE When Monitored and Set Condition: LEFT FRONT SENSOR CIRCUIT FAILURE When Monitored: Ignition on. The CAB monitors the wheel speed circuit every 7 milliseconds (ms). Set Condition: If the CAB detects an open or shorted wheel speed sensor circuit, the Diagnostic Trouble Code (DTC) will set. - Page 35 BRAKES (CAB) LEFT FRONT SENSOR CIRCUIT FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the Left Front Wheel Speed Sensor connector. Note: Check connector - Clean/repair as necessary. Disconnect the CAB connector. Note: Check connector - Clean/repair as necessary. Turn the ignition on.
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Page 36: Left Front Sensor Signal Failure
BRAKES (CAB) Symptom: LEFT FRONT SENSOR SIGNAL FAILURE When Monitored and Set Condition: LEFT FRONT SENSOR SIGNAL FAILURE When Monitored: Wheel speed comparison is checked at drive off or every 7 milliseconds (ms). Sensor circuit continuity is checked every 7 milliseconds. Wheel speed phase length supervision is checked every 7 milliseconds. - Page 37 BRAKES (CAB) LEFT FRONT SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Inspect the Tone Wheel for damaged or missing teeth, cracks, or looseness. Note: The Tone Wheel Teeth should be perfectly square, not bent or nicked. Is the Tone Wheel OK? Yes →...
- Page 38 BRAKES (CAB) LEFT FRONT SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Visually inspect wheel speed sensor. Visually inspect tone wheel. Visually inspect wiring harness. Visually inspect brakes for locking up due to lining contamination or overheating. Inspect all Components for defects which may cause a Signal DTC to set.
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Page 39: Left Rear Sensor Circuit Failure
BRAKES (CAB) Symptom: LEFT REAR SENSOR CIRCUIT FAILURE When Monitored and Set Condition: LEFT REAR SENSOR CIRCUIT FAILURE When Monitored: Ignition on. The CAB monitors the wheel speed circuit every 7 milliseconds (ms). Set Condition: If the CAB detects an open or shorted wheel speed sensor circuit, the Diagnostic Trouble Code (DTC) will set. - Page 40 BRAKES (CAB) LEFT REAR SENSOR CIRCUIT FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the Left Rear Wheel Speed Sensor connector. Note: Check connector - Clean/repair as necessary. Disconnect the CAB connector. Note: Check connector - Clean/repair as necessary. Turn the ignition on.
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Page 41: Left Rear Sensor Signal Failure
BRAKES (CAB) Symptom: LEFT REAR SENSOR SIGNAL FAILURE When Monitored and Set Condition: LEFT REAR SENSOR SIGNAL FAILURE When Monitored: Wheel speed comparison is checked at drive off or every 7 milliseconds (ms). Wheel speed circuit continuity is checked every 7 milliseconds. Wheel speed phase length supervision is checked every 7 milliseconds. - Page 42 BRAKES (CAB) LEFT REAR SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Inspect the Tone Wheel for damaged or missing teeth, cracks, or looseness. Note: The Tone Wheel Teeth should be perfectly square, not bent or nicked. Is the Tone Wheel OK? Yes →...
- Page 43 BRAKES (CAB) LEFT REAR SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Visually inspect wheel speed sensor. Visually inspect tone wheel. Visually inspect wiring harness. Visually inspect brakes for locking up due to lining contamination or overheating. Inspect all Components for defects which may cause a Signal DTC to set.
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Page 44: Pci Bus Communication
BRAKES (CAB) Symptom: PCI BUS COMMUNICATION When Monitored and Set Condition: PCI BUS COMMUNICATION When Monitored: Ignition ON, every 7 ms. Set Condition: When the CAB does not receive a message from the instrument cluster for 10 seconds. POSSIBLE CAUSES CHECK COMMUNICATION TO MIC CAB-- INTERNAL FAULT TEST... -
Page 45: Pump Motor Circuit Not Working Properly
BRAKES (CAB) Symptom: PUMP MOTOR CIRCUIT NOT WORKING PROPERLY When Monitored and Set Condition: PUMP MOTOR CIRCUIT 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 brake is applied, the test will run at 40 km/h (25 mph). - Page 46 BRAKES (CAB) PUMP MOTOR CIRCUIT NOT WORKING PROPERLY — Continued TEST ACTION APPLICABILITY Turn the ignition on. With the DRBIII , read DTC’s. With the DRBIII , erase DTC’s. Turn the ignition off. Turn the ignition on. With the DRBIII , actuate the ABS pump motor. Did the Pump Motor operate when actuated? →...
- Page 47 BRAKES (CAB) PUMP MOTOR CIRCUIT NOT WORKING PROPERLY — Continued TEST ACTION APPLICABILITY Turn the ignition off. Make sure the Pump Motor connector is secure If there are no potential causes remaining, replace the Fuse. If there are no possible causes remaining, view repair. Repair Replace the ABS Pump Motor Fuse.
- Page 48 BRAKES (CAB) PUMP MOTOR CIRCUIT NOT WORKING PROPERLY — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect CAB Connector. Note: Check connector - Clean/repair as necessary. Measure the resistance of the CAB ground circuits. Is the resistance below 1.0 ohm? Yes →...
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Page 49: Right Front Sensor Circuit Failure
BRAKES (CAB) Symptom: RIGHT FRONT SENSOR CIRCUIT FAILURE When Monitored and Set Condition: RIGHT FRONT SENSOR CIRCUIT FAILURE When Monitored: Ignition on. The CAB monitors the wheel speed circuit every 7 milliseconds (ms). Set Condition: If the CAB detects an open or shorted wheel speed sensor circuit, the Diagnostic Trouble Code (DTC) will set. - Page 50 BRAKES (CAB) RIGHT FRONT SENSOR CIRCUIT FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the Right Front Wheel Speed Sensor connector. Note: Check connector - Clean/repair as necessary. Disconnect the CAB connector. Note: Check connector - Clean/repair as necessary. Turn the ignition on.
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Page 51: Right Front Sensor Signal Failure
BRAKES (CAB) Symptom: RIGHT FRONT SENSOR SIGNAL FAILURE When Monitored and Set Condition: RIGHT FRONT SENSOR SIGNAL FAILURE When Monitored: Wheel speed comparison is checked at drive off or every 7 milliseconds (ms). Wheel speed continuity is checked every 7 milliseconds. Wheel speed phase length supervision is checked every 7 milliseconds. - Page 52 BRAKES (CAB) RIGHT FRONT SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Inspect the Tone Wheel for damaged or missing teeth, cracks, or looseness. Note: The Tone Wheel Teeth should be perfectly square, not bent or nicked. Is the Tone Wheel OK? Yes →...
- Page 53 BRAKES (CAB) RIGHT FRONT SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Visually inspect wheel speed sensor. Visually inspect tone wheel. Visually inspect wiring harness. Visually inspect brakes for locking up due to lining contamination or overheating. Inspect all Components for defects which may cause a Signal DTC to set.
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Page 54: Right Rear Sensor Circuit Failure
BRAKES (CAB) Symptom: RIGHT REAR SENSOR CIRCUIT FAILURE When Monitored and Set Condition: RIGHT REAR SENSOR CIRCUIT FAILURE When Monitored: Ignition on. The CAB monitors the wheel speed circuit every 7 milliseconds (ms). Set Condition: If the CAB detects an open or shorted wheel speed sensor circuit, the Diagnostic Trouble Code (DTC) will set. - Page 55 BRAKES (CAB) RIGHT REAR SENSOR CIRCUIT FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the Right Rear Wheel Speed Sensor connector. Note: Check connector - Clean/repair as necessary. Disconnect the CAB connector. Note: Check connector - Clean/repair as necessary. Turn the ignition on.
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Page 56: Right Rear Sensor Signal Failure
BRAKES (CAB) Symptom: RIGHT REAR SENSOR SIGNAL FAILURE When Monitored and Set Condition: RIGHT REAR SENSOR SIGNAL FAILURE When Monitored: Wheel speed comparison is checked at drive off or every 7 milliseconds (ms). Wheel speed circuit continuity is checked every 7 milliseconds. Wheel speed phase length supervision is checked every 7 milliseconds. - Page 57 BRAKES (CAB) RIGHT REAR SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Inspect the Tone Wheel for damaged or missing teeth, cracks, or looseness. Note: The Tone Wheel Teeth should be perfectly square, not bent or nicked. Is the Tone Wheel OK? Yes →...
- Page 58 BRAKES (CAB) RIGHT REAR SENSOR SIGNAL FAILURE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Visually inspect wheel speed sensor. Visually inspect tone wheel. Visually inspect wiring harness. Visually inspect brakes for locking up due to lining contamination or overheating. Inspect all Components for defects which may cause a Signal DTC to set.
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Page 59: System Overvoltage
BRAKES (CAB) Symptom: SYSTEM OVERVOLTAGE When Monitored and Set Condition: SYSTEM OVERVOLTAGE 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 for greater than 420 milliseconds (ms), the Diagnostic Trouble Code (DTC) is set. - Page 60 BRAKES (CAB) SYSTEM OVERVOLTAGE — Continued TEST ACTION APPLICABILITY Turn the ignition off. Disconnect the CAB connector. Note: Check connector - Clean/repair as necessary. Start the engine. Raise engine speed above 1,800 RPM. Measure the battery voltage. Is the voltage above 16.5 volts ? Yes →...
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Page 61: System Undervoltage
BRAKES (CAB) Symptom: SYSTEM UNDERVOLTAGE When Monitored and Set Condition: SYSTEM UNDERVOLTAGE When Monitored: Ignition on. The CAB monitors the Fused Ignition Switch Output circuit voltage above 10 km/h (6 mph) every 7 milliseconds 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 62 BRAKES (CAB) SYSTEM UNDERVOLTAGE — 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 63: 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 64 NOTES...
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Page 65: Component Locations
COMPONENT LOCATIONS 8.0 COMPONENT LOCATIONS 8.1 CONTROLLER ANTILOCK BRAKE 8.2 DATA LINK CONNECTOR 8.2.1 DIAGNOSTIC JUNCTION PORT... -
Page 66: Fuses
COMPONENT LOCATIONS 8.3 FUSES 8.4 TONE WHEELS LEFT FRONT RIGHT FRONT LEFT REAR RIGHT REAR... -
Page 67: Wheel Speed Sensors
COMPONENT LOCATIONS 8.5 WHEEL SPEED SENSORS LEFT FRONT RIGHT FRONT LEFT REAR RIGHT REAR 8.6 WHEEL SPEED SENSOR CONNECTORS LEFT FRONT RIGHT FRONT... -
Page 68: Adjustable Pedals Switch
COMPONENT LOCATIONS 8.7 ADJUSTABLE PEDALS SWITCH 8.8 ADJUSTABLE PEDALS MODULE 8.9 ADJUSTABLE PEDALS COMPONENTS... -
Page 69: Connector Pinouts
CONNECTOR PINOUTS 9.0 CONNECTOR PINOUTS ADJUSTABLE PEDALS MODULE (EXCEPT BUILT-UP-EXPORT) - GREEN 14 WAY CIRCUIT FUNCTION Y151 20LG/BR ADJUSTABLE PEDALS SWITCH SENSE (FORWARD) Y152 20LG/OR ADJUSTABLE PEDALS SWITCH SENSE (REARWARD) Q110 16OR/VT ADJUSTABLE PEDALS MOTOR (FORWARD) F72 16RD/YL FUSED B(+) Q111 16OR/GY ADJUSTABLE PEDALS MOTOR (REARWARD) Q113 20OR/DB (MEMORY) -
Page 70: Left Front Wheel Speed Sensor - Gray 2 Way
CONNECTOR PINOUTS LEFT FRONT WHEEL SPEED SENSOR - GRAY 2 WAY CIRCUIT FUNCTION B9 18RD LEFT FRONT WHEEL SPEED SENSOR 12 VOLT SUPPLY B8 18RD/DB LEFT FRONT WHEEL SPEED SENSOR SIGNAL LEFT REAR WHEEL SPEED SENSOR - GRAY 2 WAY CIRCUIT FUNCTION B4 18LG... -
Page 71: Schematic Diagrams
SCHEMATIC DIAGRAMS 10.0 SCHEMATIC DIAGRAMS 10.1 WJ BODY TEVES MARK 20... -
Page 72: Adjustable Pedals System
SCHEMATIC DIAGRAMS 10.2 ADJUSTABLE PEDALS SYSTEM... - Page 73 NOTES...
- Page 74 NOTES...
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