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Home >> Cadillac >> 2018 >> CT6 Plug-In >> Repair and Diagnosis >> Electrical >> Charging Systems >> Plug-In Charging >> Diagnostic Information and Procedures >> DTC P0D3E, P0D3F, P0D40 >> Circuit/System Testing
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Circuit/System Testing

  1. Vehicle OFF, disconnect the X1 harness connector at the T18 Battery Charger. Vehicle in Service Mode.
  2. Verify the scan tool Battery Charger AC Input Status Duty Cycle parameter is less than 10%.
    • If 10% or greater 
    1. Vehicle OFF, disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for infinite resistance between the AC voltage sensor circuit terminal 10 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • Go to next step: If less than 10% 
  3. Install a 3 A fused jumper wire between the AC voltage sensor circuit terminal 10 and the ground circuit terminal 2.
  4. Verify the scan tool Battery Charger AC Input Status Duty Cycle parameter is greater than 90%.
    • If 90% or less 
    1. Vehicle OFF, disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2. Vehicle in Service Mode.
    2. Test for less than 1 V between the AC voltage sensor circuit terminal 10 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    3. Vehicle OFF.
    4. Test for less than 2 Ω in the AC voltage sensor circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • Go to next step: If greater than 90% 
  5. Replace the T18 Battery Charger.
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