C0095

DTC C0060-C0095, C0121, C0141, C0146, C0151, or C0156

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0060 00
- Left Front Dump Solenoid Valve Circuit Malfunction

DTC C0065 00
- Left Front Isolation Solenoid Valve Circuit Malfunction

DTC C0070 00
- Right Front Dump Solenoid Valve Circuit Malfunction

DTC C0075 00
- Right Front Isolation Solenoid Valve Circuit Malfunction

DTC C0080 00
- Left Rear Dump Solenoid Valve Circuit Malfunction

DTC C0085 00
- Left Rear Isolation Solenoid Valve Circuit Malfunction

DTC C0090 00
- Right Rear Dump Solenoid Valve Circuit Malfunction

DTC C0095 00
- Right Rear Isolation Solenoid Valve Circuit Malfunction

DTC C0121 00
- Valve Relay Circuit Malfunction

DTC C0141 00
- Front Prime Solenoid Valve Circuit Malfunction

DTC C0146 00
- Front Isolation Solenoid Valve Circuit Malfunction

DTC C0151 00
- Rear Prime Solenoid Valve Circuit Malfunction

DTC C0156 00
- Rear Isolation Solenoid Valve Circuit Malfunction

Circuit/System Description

The valve relay is located within the electronic brake control module and supplies battery voltage to all of the solenoid valves when commanded On. The solenoid valves are integral parts of the brake pressure modulator. The brake pressure modulator contains an isolation solenoid valve and a dump solenoid valve for each wheel. It also contains a traction control/stability control prime solenoid valve and isolation solenoid valve for each brake circuit. The solenoid valves are not engaged during normal system operation. When the ABS, the traction control or stability control operation is required the module turns the required solenoid valves ON or OFF.

Conditions for Running the DTC

* The valve relay is commanded ON.

* The ignition voltage is greater than 10 V.

Conditions for Setting the DTC

* The electronic brake control module detects a valve or solenoid malfunction.

* The electronic brake control module detects an open in the B+ circuit to the valve relay.

Action Taken When the DTC Sets

* The ABS indicator turns ON.

* The traction control/stability control indicator turns ON.

* The electronic brake control module disables the ABS, the traction control system and the electronic stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

* When the condition for setting the DTC is no longer present.

* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Note: During normal diagnostic and/or repair verification technicians may find that the ABS, Traction control and/or Stability control indicators may be ON with NO DTCs displayed by the electronic brake control module. Do not replace the electronic brake control module for this condition.

If the ABS, Traction control and/or Stability control indicators are ON with no DTCs set, perform the following steps:

1. Remove the key from the ignition, open and close the driver's door to turn off retained accessory power, and wait 60 seconds.

2. Ignition ON, if the ABS, Traction Control and/or Stability control indicators are still illuminated, operate the vehicle at speeds greater than 16 km/h (10 MPH) to complete the self test. The electronic brake control module should request all indicators to turn OFF.

3. If indicators remain ON with no DTCs set after the drive cycle, disconnect the battery for at least 60 seconds then reconnect the battery.

4. Operate the vehicle at speeds greater than 40 km/h (25 MPH), the electronic brake control module should request all the indicators to turn OFF.

Reference Information

Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly - Primary

Description and Operation

ABS Description and Operation (Without F55) ABS Description and Operation (Without F55)ABS Description and Operation (With F55) ABS Description and Operation (With F55)

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Testing

1. Ignition ON.

2. Verify that DTC C0060, C0065, C0070, C0075, C0080, C0085, C0090, C0095, C0121, C0141, C0146, C0151, or C0156 is not set.

• If any of the DTCs are set

1. Replace the K17 electronic brake control module.

2. Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.

• If the DTC sets, replace the Q5 brake pressure modulator.

• If the DTC does not set

3. All OK.

• If none of the DTCs are set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Brake Pressure Modulator Valve Replacement Service and Repair

* Control Module References Control Module References for electronic brake control module replacement, programming and setup