Circuit/System Verification
NOTE:
- DTC P15F6 is an informational DTC.
- Diagnose any other DTCs set in the K20 Engine Control Module prior to diagnosing DTC P15F6.
- Verify there are no DTCs set in the K20 Engine Control Module and there are no communication DTCs set in any control module
- If any DTCs are set
- If no other DTC are set
- Verify there are no intermittent serial data circuit fault. Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device
.
- If an intermittent serial data circuit fault is found
Repair as necessary.
- If an intermittent serial circuit fault is not found
- If an intermittent serial data circuit fault is found
- Clear all DTCs and operate the vehicle in the conditions that the customer experienced.
- Verify that DTC P15F6 does not set.
- If the DTC sets
Replace K14 Distance Sensing Cruise Control Module
- If the DTC does not set
- If the DTC sets
- All OK.