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 C0280: Stability System Active Too Long

### Circuit/System Description

The electronic brake control module (EBCM) detects a malfunction when VSES brake intervention is active for more than an excessive amount of time.

### Conditions for Running the DTC

The ignition voltage is above 9.5 volts.

### Conditions for Setting the DTC

The EBCM detects VSES is active for more than 15 seconds.

### Action Taken When the DTC Sets

• | The VSES functionality is disabled.

• | A DIC message and/or a warning indicator may be displayed.

### Conditions for Clearing the DTC

• | The condition for the DTC is no longer present.

• | The EBCM automatically clears the history DTC when a current DTC is not detected in 50 consecutive drive cycles.

### Diagnostic Aids

• | If there are any other DTCs recorded against the dynamic sensor diagnose them first.

• | This DTC may be stored as a history DTC without affecting the operation of the module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.

• | If this DTC is retrieved as both a current and history DTC, replace the yaw rate/accelerometer sensor.

### Reference Information

#### Schematic Reference

Antilock Brake System Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation Reference

ABS Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

• | Connector Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit Verification

1. Verify DTC C0186 or C0196 is not set.

⇒ | If either of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle

2. Replace the yaw/lat sensor.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Longitudinal Accelerometer Replacement