For 1990-2009 cars only
Circuit Description
This DTC identifies a malfunction within the EBCM/EBTCM.
Conditions for Setting the DTC
An internal EBCM/EBTCM malfunction exists.
Action Taken When the DTC Sets
| • | A DTC C1255xx is stored |
| • | Depending on the sub code, the ABS/TCS and/or the Magna Steer® is disabled |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and you used the scan tool Clear DTC function. |
| • | The EBCM/EBTCM does not detect the DTC in 50 drive cycles. |
Diagnostic Aids
| • | Two more numbers will follow the DTC C1255xx on the scan tool, which should be noted along with any other DTCs that may be displayed. These two numbers help engineering to determine the cause of the internal malfunction. |
| • | A DTC C1255e2 can be caused by a battery or module connector disconnect. Inspect for a recent battery disconnect or module connector disconnect before replacing the EBCM/EBTCM. |
| • | A DTC C1255m5 can be set along with any wheel speed sensor DTC. Diagnose any wheel speed sensor DTCs before replacing the EBCM/EBTCM. |
| • | Inspect that the EBCM/EBTCM to BPMV connection is secure, tight, and free from corrosion. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the ABS Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |
2 | Are there any other DTCs present besides C1255xx? | -- | ||
3 |
Does DTC reset? | -- | System OK | |
4 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | -- | Go to Diagnostic System Check | -- |
