C1278

DTC C1278 TCS Temporarily Inhibited By PCM:

Torque Signal Circuit Schematic:

CIRCUIT DESCRIPTION
The PCM monitors various parameters and will not allow "Traction Control" operation if any parameter falls below a predetermined value.

CONDITION FOR SETTING THE DTC
- A malfunction has been detected by the PCM. The PCM then causes "TCS" shutdown until the malfunction has been corrected.

ACTION TAKEN WHEN THE DTC SETS
- This is a temporary operational malfunction. A malfunction DTC is stored, "TCS" is disabled and the "TRACTION OFF" indicator lamp is turned "ON." "ABS" remains functional. If "TCS" is no longer inhibited the indicator lamp will be turned "OFF" but the DTC will still be stored.

CONDITIONS FOR CLEARING DTC
- Condition for DTC is no longer present and scan tool clear DTC function is used.
- 50 ignition cycles have passed with no DTC(s) detected.

DIAGNOSTIC AIDS
- This code is for information only. It indicates there are no problems in the ABS/TCS system, as an aid to the technician.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
4. Checks if DTC C1278 resets.