Circuit/System Testing

Verify DTC P0D44, P0D45, P0D49, P1EE9, or P1EEA is not set.
- If any of the DTCs are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If none of the 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 OFF, charger disconnected, all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Disconnect the X2 harness connector at the T18 Battery Charger.
Test for less than 10 Ω between the ground circuit terminal 1 and ground.
- If 10 Ω or greater
  Repair the open/high resistance in the circuit.
- If less than 10 Ω
Verify a test lamp illuminates between the B+ circuit terminal 2 and ground.
- If the test lamp does not illuminate and the circuit fuse is good
  Test for less than 2 Ω in the B+ circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
- If the test lamp does not illuminate and the circuit fuse is open
  Test for infinite resistance between the B+ circuit and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- If infinite resistance, replace the T18 Battery Charger.
- If the test lamp illuminates
Replace the T18 Battery Charger.