For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using the 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 an internal malfunction.

### Conditions for Running the DTC

The ignition switch is in the ON position.

### Conditions for Setting the DTC

• | The control module detects an internal write malfunction.

• | The control module detects an internal checksum malfunction.

### Action Taken When the DTC Sets

One or more of the following actions may occur:

• | The Antilock Brake System (ABS)/dynamic rear proportion (DRP) are disabled.

• | The ABS indicators turn ON.

• | The red BRAKE Warning indicator turns ON.

• | The traction control system (TCS) LED turns OFF.

• | The ESP Active Lamp blinks for 15 seconds or more.

### Conditions for Clearing the DTC

• | The condition for 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

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 module.

### Circuit/System Verification

1. If the DTC did not set as a current DTC see diagnostic aids.
2. If the DTC is set as a current DTC.

⇒ | Replace the EBCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming