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 DTCs C1261 - C1274 are set along with C1256xx then pursue the solenoid DTCs 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/Active Handling (RPO JL4) are not disabled and the ABS and Car Icon (TCS indicator) 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 DTCs 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? | -- | ||
2 | Are any valve solenoid DTC(s) present (C1261 - C1274)? | -- | Go to Applicable DTC Table. Refer to Diagnostic Trouble Code (DTC) List | |
3 |
Was any damage found? | -- | ||
4 | Repair as necessary. Is the repair complete? | -- | -- | |
5 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | -- | -- |
