For 1990-2009 cars

### 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 cluster turns ON the ABS indicator for 5 s after ignition ON or when the electronic brake control module (EBCM) 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

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

ABS Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Ignition ON, the ABS indicator should turn ON. After 5 s the ABS indicator should turn OFF.

### Circuit/System Testing

1. Ignition ON, with a scan tool command the instrument cluster All Indicators test ON and OFF. Verify the ABS indicator turns ON and OFF.

⇒ | If the ABS indicator does not turn ON and OFF, replace the P16 Instrument Panel Cluster (IPC).

2. Verify the ABS indicator turns OFF 5 s after ignition ON.

⇒ | If the ABS indicator does not turn OFF, replace the K17 Electronic Brake Control Module (EBCM).

### Repair Instructions

• | Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Control Module References for instrument cluster or EBCM replacement, setup and programming