Circuit/System Testing

Verify no other battery charger DTCs are set.
- If any other battery charger DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no other battery charger DTCs are set
Vehicle OFF. Wait 2 minutes for C1 Battery voltage to stabilize.
Test for 12.4-12.8 V between the C1 Battery terminals.
- If not within the specified range
  Refer to Battery Inspection/Test .
- If within the specified range
Vehicle ON, accessories OFF.
Test the C1 Battery for at least 1 V greater than the voltage measured in step 3 but less than 15 V.
- If not within the specified range
  Refer to DC Power Conversion Test .
- If within the specified range
Replace the T18 Battery Charger.