For 1990-2009 cars only
Circuit Description
This DTC identifies a possible malfunction within the electronic brake control module (EBCM). When the EBCM relay is activated, voltages are supplied to the valve solenoids and pump motor.
Conditions for Setting the DTC
DTC C0056 will set when a possible internal malfunctions exist.
Action Taken When the DTC Sets
| • | The ABS warning lamp is not turned ON. |
| • | DTC 0056 is stored. |
| • | ABS remains functional. |
Conditions for Clearing the DTC
| • | If the conditions that set DTC C0056 are no longer present, the DTC may be cleared by using the proper scan tool. |
| • | The DTC that has not occurred in 100 drive cycles will be cleared from the history data. |
Diagnostic Aids
| • | Repair low voltage, driveability, or other electrical complaints first, prior to performing DTC C0056. |
| • | Ensure the integrity of the connection between the EBCM and the brake pressure modulator valve (BPMV) is secure, tight, and free of corrosion, leaks, and/or damage. |
| • | Possible cause for DTC C0056 to set is an internal relay problem within the EBCM. |
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check - ABS? | Go to Step 2 | |
2 |
Does the scan tool display any DTCs set in current or history data other than DTC C0056? | Go to Step 3 | |
3 |
Were any problems found? | Go to Step 4 | Go to Step 5 |
4 | Repair as needed. Did you find and correct the condition? | System OK | -- |
5 | Replace the EBCM. Refer to Brake Pressure Modulator Valve Assembly Replacement . Did you complete the replacement? | System OK | -- |
