Circuit Description
The PCM monitors various parameters and will not allow traction control operation if any parameter falls outside a specified range.
Conditions for Setting the DTC
The PCM detects a malfunction and causes TCS shut down until the malfunction has been corrected.
Action Taken When the DTC Sets
| • | A malfunction DTC is stored (This is a temporary malfunction). |
| • | The TCS is disabled. |
| • | The TRACTION OFF indicator is turned ON. |
| • | If the TCS is no longer inhibited, the TRACTION OFF indicator is turned OFF, but the DTC will be stored as history. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and you used the scan tool Clear DTC function. |
| • | The EBCM/EBTCM does not detect the DTC in 50 drive cycles. |
Diagnostic Aids
This DTC is for information only. As an aid to the technician, this DTC indicates that there are no problems in the ABS/TCS system.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Are any other DTCs set? | -- | Go to Step 3 | |
3 | Inspect for DTC C1278. Is DTC C1278 set as a current code? | -- | Go to Step 5 | Go to Step 4 |
Did DTC C1278 set in the last 3 drive cycles? | -- | Go to Step 5 | ||
5 | Perform the Powertrain OBD System Check. Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.8L. Is DTC C1278 still set as a current code? | -- | Go to Diagnostic Aids | Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.8L |
