For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit/System Description
The instrument panel cluster (IPC) illuminates the Antilock Brake System (ABS) indicator by supplying ground to the lamp. The electronic brake control module (EBCM) sends a serial data messages to the IPC, in order to command the indicator ON or OFF.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Electrical Information Reference
| • | Circuit Testing |
| • | Wiring Repairs |
Scan Tool Reference
Circuit Verification
Ignition ON, observe the ABS indicator to turn ON then OFF during the IPC bulb test.
Circuit/System Testing
Important: Diagnose all vehicle DTCs before using this diagnostic.
- Ignition On, perform the display test with a scan tool, verify the ABS indicator turns On then OFF.
- Replace the EBCM.
| ⇒ | If the ABS warning lamp does not turn OFF, replace the IPC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM or IPC replacement, setup, and programming
