Circuit/System Verification

Perform the Battery Inspection/Test .
NOTE: To accurately diagnose the charging system, the C1 Battery must be fully charged and capable of passing the Battery Inspection/Test.
Vehicle ON.
Verify that no DTCs are set that would cause a charging system concern.
- If an applicable DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If no applicable DTCs are set
Vehicle OFF.
Measure and record the C1 Battery voltage at the C1 Battery terminals. The C1 Battery voltage should stabilize within a few minutes of turning the vehicle OFF.
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 previously but less than 15 V.
- If not within the specified range
  Refer to Circuit/System Testing .
- If within the specified range
All OK