Circuit/System Verification
WARNING: This page is about a different car, the 2023 GMC Hummer EV. However, it is still accessible from the selected car via links, so may be relevant.
- Vehicle ON.
- Verify DTC P1F59, P1F5A, P1F5B, P1F5D, or P1F5E is not set.
- If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTC is set
- If any of the DTCs are set
- Vehicle OFF. Measure and record the C1 battery voltage at the C1 battery terminals. The C1 battery voltage should stabilize between 12.4 and 12.8 V after 12 minutes of turning the vehicle OFF.
- If not in the specified range
Refer to Battery Inspection/Test .
- Go to next step: If within the specified range
- If not in the specified range
- Vehicle ON, accessories OFF.
- Measure and record the C1 battery voltage at the C1 battery terminals. The voltage should be at least 1 V greater than the voltage measured in step 1 but less than 15 V.
- If not in the specified range
Refer to Circuit/System Testing
- Go to next step: If within the specified range
- If not in the specified range
- All OK.