ABS Indicator Malfunction

ABS Indicator Malfunction

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.

Circuit/System Description

The instrument cluster turns ON the ABS indicator for 5 seconds after Vehicle in Service Mode or when the electronic brake control module detects a fault and sends a serial data message to the instrument cluster commanding the indicator ON.

Reference Information

Schematic Reference

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

Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1

Description and Operation

ABS Description and Operation Description and Operation

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 Programming and Relearning for scan tool information

Circuit/System Verification

1. Vehicle in Service Mode.

2. Verify that no DTCs are set.

• If any DTCs are set

Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

• If no DTCs are set

3. Verify the instrument cluster ABS indicator turns ON and OFF when commanding the All Indicators ON and OFF with a scan tool.

• If ABS indicator does not turn ON and OFF

Replace the P16 instrument cluster.

• If the ABS indicator turns ON and OFF

4. Verify the ABS indicator turns OFF 5 seconds after the ignition is turned ON.

• If the ABS indicator does not turn OFF

Replace the K17 electronic brake control module.

• If the ABS indicator turns OFF

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Programming and Relearning for electronic brake control module or instrument cluster replacement, programming and setup