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 C1256xx, pursue the solenoid DTCs first. |
| • | There is an internal EBCM/EBTCM malfunction |
Action Taken When the DTC Sets
| • | A DTC C1256xx is stored |
| • | The ABS/TCS is not disabled, and the ABS and TRACTION OFF indicators are not turned on |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and the scan tool clear DTC function is used |
| • | 50 ignition cycles have passed with no DTCs detected |
Diagnostic Aids
| • | Two more numbers will follow the DTC C1256xx 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. |
| • | Inspect that the EBCM/EBTCM to BPMV connection 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 | Was the Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |
2 | Are there any valve DTCs present (C1261-C1271)? | -- | Go to Diagnostic Trouble Code (DTC) List for Appropriate DTC Table | |
Was any damage found? | -- | |||
4 | Repair as necessary. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | -- |
5 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | -- | Go to Diagnostic System Check | -- |
