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.

### DTC Descriptor

DTC C0292 : VSES Combination Sensor Circuits

### Circuit/System Description

The electronic brake control module (EBCM) supplies a reference voltage of 5 volts to the yaw rate sensor lateral accelerometer and the steering wheel position sensor. The sensor supply voltage is monitored via an internal feedback circuit to the EBCM microprocessor.

### Conditions for Running the DTC

• | The ignition is ON.

• | Ignition voltage is greater than 9.5 volts.

### Conditions for Setting the DTC

The yaw/lateral sensor is setting an internal electronic failure.

### Action Taken When the DTC Sets

• | Vehicle stability enhancement system (VSES) is disabled

• | The VSES indicator turns ON.

• | The driver information center (DIC) displays the Service ESC message.

### Conditions for Clearing the DTC

• | The condition for setting the DTC is no longer present and the DTC is cleared with a scan tool.

• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

### Diagnostic Aids

If the yaw and lateral accelerometer sensor is disconnected, DTCs will set and the EBCM will not provide 5-volt reference.

### Reference Information

#### Schematic Reference

Antilock Brake System Schematics

#### Connector End View Reference

Antilock Brake System Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Scan Tool Data List for EBCM

### Circuit/System Testing

1. Ignition OFF, disconnect the yaw rate sensor/lateral accelerometer connector.
2. Ignition OFF, test for less than 1 ohm of resistance between the low reference circuit and ground.

⇒ | If greater than 1 ohm, test the low reference circuit and the EBCM ground circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the EBCM.

3. Test the lateral accelerometer signal circuit, the 5-volt reference circuit, and the low reference circuit for an open/high resistance or a short to voltage or ground.

⇒ | If all circuits test normal, replace the yaw rate sensor/lateral accelerometer, and clear the yaw rate sensor offset value in the EBCM.

⇒ | If the DTC sets again after replacing the yaw rate sensor/lateral accelerometer, replace the EBCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Electronic Brake Control Module Replacement

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