Circuit Description
The PCM monitors various parameters and will not allow Traction Control/Active Handling (if equipped with RPO JL4) 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/Active Handling shutdown until the malfunction has been corrected.
Action Taken When the DTC Sets
This is a temporary operational malfunction.
TCS/Active Handling (if equipped with RPO JL4) are disabled.
| • | Indicators that turn on: |
| Car Icon (TCS indicator) |
| • | Messages displayed on the DIC: |
| Service Traction System |
| Service Active HNDLG (if equipped with RPO JL4) |
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 DTCs detected. |
Diagnostic Aids
This code is for information only. It indicates there are no problems in the ABS/TCS/Active Handling system, is used as an aid to the technician.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | ||
2 |
Are any other DTC(s) set? | -- | Go to Applicable DTC table. Refer to Diagnostic Trouble Code (DTC) List | |
3 | Is DTC C1278 set as a current code? | -- | ||
4 |
Did DTC C1278 set in the last three drive cycles? | -- | ||
5 | Perform a Powertrain OBD System Check. Refer to Powertrain OBD System Check in Engine Controls. Did vehicle pass the OBD System Check? | -- | Refer to Diagnostic Aids | Go to Powertrain OBD System Check in Engine Controls |
