For 1990-2009 cars only
Circuit Description
This DTC identifies a malfunction within the EBCM/EBTCM.
Conditions for Setting the DTC
| • | There is a solenoid short to battery inside the BPMV. If DTCs C1261-C1274 are set along with DTC C1256xx, pursue the solenoid DTCs first. |
| • | There is an internal EBCM/EBTCM malfunction. |
Action Taken When the DTC Sets
| • | A malfunction DTC is stored. |
| • | The ABS/TCS is not disabled. |
| • | The ABS and the TRACTION OFF indicators are not turned ON. |
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 C1256xx on the scan tool. Remember these numbers along with any other DTCs that may be displayed. These 2 numbers help engineering in order to determine the cause of the internal malfunction. |
| • | Verify that the EBCM/EBTCM to BPMV connection meets the following conditions: |
| - | The connection is secure. |
| - | The connection is tight. |
| - | The connection is free from corrosion. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the ABS Diagnostic System Check performed? | -- | Go to Step 2 | |
2 | Are there any valve DTCs present (C1261-C1274)? | -- | Go to Step 3 | |
Was any damage found? | -- | Go to Step 4 | Go to Step 5 | |
4 | Repair as needed. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
5 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | -- |
