C1255

DTC C1255 EBTCM Internal Malfunction

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.