For 1990-2009 cars only
Circuit Description
This DTC identifies a malfunction within the EBTCM.
Conditions for Setting the DTC
An internal EBTCM malfunction exists.
Action Taken When the DTC Sets
| • | A malfunction DTC is stored. |
| • | The ABS/TCS/Stabilitrak® is disabled. |
| • | The ABS indicator is turned ON. |
| • | The TRACTION CONTROL indicator is turned ON. |
| • | The DIC displays the SERVICE STABILITY SYS message. |
| • | For some DTC C1255xx, the Magna Steer® is disabled and the DIC displays the SERVICE STEERING SYS message. |
Conditions for Clearing the DTC
| • | The condition for DTC is no longer present and you used scan tool Clear DTCs function. |
| • | The condition for DTC is no longer present and you used the On-Board Clear DTCs function. |
| • | The 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 EBTCM. |
| • | A DTC C1255m5 can be set along with any wheel speed sensor DTC. Diagnose any wheel speed sensor DTCs before replacing the EBTCM. |
| • | 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 | Did you perform the Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check |
2 | Are any EBTCM DTCs present other than C1255xx? | -- | Go to Step 3 | |
3 |
Was any damage found? | -- | Go to Step 4 | Go to Step 5 |
4 | Repair as necessary. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
5 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
