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
If equipped, the following actions occur:
| • | A malfunction DTC is stored. |
| • | The ABS/TCS is disabled. |
| • | The ABS indicator turns ON. |
| • | The TRACTION OFF indicator turns ON. |
| • | For some DTC C1255xx, the variable effort steering 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
| • | When the scan tool displays the DTC, 2 more numbers follow the DTC. Note the 2 numbers and any other DTCs. The 2 numbers with the DTC are an engineering aid in order 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. |
| • | Make sure the integrity of the connection between the EBCM/EBTCM and the BPMV is secure, tight, and free from corrosion. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | |
2 | Are there any other DTCs present besides C1255xx? | -- | Go to Step 3 | |
Did you find any damage? | -- | Go to Step 4 | Go to Step 5 | |
4 | Repair the EBCM/EBTCM as needed. Refer to Wiring Repairs in Wiring Systems or Electronic Brake Control Module Replacement . Did you complete the repair? | -- | -- | |
5 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | -- |
