Circuit Description
The PCM monitors various parameters and will not allow traction control operation if any parameter falls below a specified value.
Conditions for Setting the DTC
The PCM detects a malfunction and then causes TCS shut down until the malfunction has been corrected.
Action Taken When the DTC Sets
| • | A DTC C1278 is stored (This is a temporary malfunction) |
| • | The TCS is disabled |
| • | The TRACTION OFF indicator is turned on |
| • | ABS remains functional. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and the scan tool clear DTC function is used |
| • | 100 ignition cycles have passed with no DTCs detected |
Diagnostic Aids
This code is for information only. As an aid to the technician, this code indicates that there are no problems in the ABS/TCS system. Any further references for diagnostic information should be taken from Engine Controls.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | ||
2 |
Are any other DTCs set? | -- | Go to Diagnostic Trouble Code (DTC) List for the appropriate DTC | |
3 | Is DTC C1278 set as a current code? | -- | ||
4 |
Did DTC C1278 set in the last three drive cycles? | -- | System OK | |
5 | Perform the Powertrain OBD System Check. Refer to A Powertrain On Board Diagnostic (OBD) System Check or A Powertrain On Board Diagnostic (OBD) System Check in Engine Controls. Did the vehicle pass the OBD System Check? | -- | -- |
