Circuit Description
The PCM monitors various parameters and will not allow Traction Control operation if any parameter falls beyond a predetermined value.
Conditions 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 Control indicator is turned ON. ABS remains functional. If TCS is no longer inhibited the indicator will be turned OFF but the DTC will still be stored.
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
| • | This code is for information only. It indicates there are no problems in the ABS/TCS system, is used as an aid to the technician. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |
2 |
Are any other DTC(s) set? | -- | Go to that DTC table | |
3 | Is DTC C1278 set as a current code? | -- | ||
4 |
Did DTC C1278 set in the last three drive cycles | -- | Go to Diagnostic System Check | |
5 | Perform a Powertrain OBD System Check. Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls. Did vehicle pass the OBD System Check? | -- | Refer to Diagnostic Aids | Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls |
