For 1990-2009 cars

### Circuit Description

This DTC identifies a malfunction within the EBCM. When the electronic brake control relay is activated (turned ON), voltage is supplied to the valve solenoids and pump motor.

### Conditions for Running the DTC

The ABS conditions are normal.

### Conditions for Setting the DTC

DTC C1256 is set when an internal EBCM malfunction exists.

### Action Taken When the DTC Sets

• | ABS remains functional

• | The ABS warning indicator remains OFF.

### Conditions for Clearing the DTC

• | The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used.

• | 100 drive cycles pass with no DTCs detected. A drive cycle consists of starting the vehicle, driving the vehicle over 16 km/h (10 mph), stopping and then turning the ignition OFF.

### Diagnostic Aids

Inspect that the EBCM to BPMV connection is secure, tight, and free of corrosion.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - ABS
2 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | -- | System OK | --