For 1990-2009 cars only
Circuit Description
This DTC identifies a malfunction within the EBTCM.
Conditions for Setting the DTC
| • | DTC C1256xx can be set when there is a solenoid short to battery inside the BPMV. If DTC(s) C1261 - C1274 are set along with C1256xx then pursue the solenoid DTC(s) first). |
| • | DTC C1256xx can be set when there is an internal EBTCM malfunction. |
Action Taken When the DTC Sets
A malfunction DTC is stored, ABS/TCS is not disabled and the ABS and Traction Control indicators are not turned ON.
Conditions for Clearing the DTC
| • | Condition for DTC is no longer present and scan tool clear DTC function is used. |
| • | Fifty ignition cycles have passed with no DTC(s) detected. |
Diagnostic Aids
| • | When DTC C1256xx is displayed on the Scan Tool, it will be followed by two more numbers which should be noted along with any other DTCs that may be displayed. The additional two numbers displayed with DTC C1256xx are for aiding engineering to determine the cause of the internal malfunction. |
| • | Make sure the integrity of the connection between the EBTCM and the BPMV is secure, tight, and free from corrosion. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |
2 | Are any valve solenoid DTC(s) present (C1261 - C1274)? | -- | Go to Applicable DTC Table | |
3 |
Was any damage found? | -- | ||
4 | Repair as necessary. Is the repair complete? | -- | Go to Diagnostic System Check | -- |
5 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module . Is the replacement complete? | -- | Go to Diagnostic System Check | -- |
