For 1990-2009 cars

### Circuit/System Description

The Stability Ctrl Off indicator is controlled by the instrument cluster via serial data messages from the EBCM. When the stability control switch input is grounded through the momentary stability control switch, it sends a serial data message to the EBCM that tells the EBCM that the stability control switch has been pressed. The EBCM then disables stability control and sends a serial data message to the instrument cluster to turn on the Stability Ctrl Off indicator on the instrument panel. Each time the ignition is cycled from OFF to ON, the stability control system is enabled.

### Reference Information

#### Schematic Reference

Antilock Brake System Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References

### Circuit/System Testing

1. Install a scan tool.
2. Ignition ON engine OFF, observe the ESP Failed parameter in the Body/EBCM/data list.

⇒ | If the indicator parameter does not display OFF inspect for poor connections at the harness connector of the EBCM.

⇒ | If the connections at the harness connector of the EBCM are OK, replace the EBCM.

3. Ignition ON engine OFF, observe the Stability Ctrl Off indicator on the instrument panel cluster (IPC) during the bulb check.

⇒ | If the indicator parameter does not display OFF inspect for poor connections at the harness connector of the IPC.

⇒ | If the connections at the harness connector of the IPC are OK, replace the IPC.

### Repair Instructions

• | Electronic Brake Control Module Replacement .

• | Instrument Cluster Replacement .

• | Electronic Brake Control Module Programming and Setup .

• | Instrument Cluster Programming and Setup .