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Home >> Cadillac >> 2013 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, or P1B04 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
    NOTE:

    You must perform the Component Testing before proceeding with Circuit/System Testing.

  1. Vehicle OFF, disconnect the X175/X176 harness connector at the transmission.
  2. Install the DT-48493  jumper harness to the vehicle harness side only.
  3. Vehicle ON.
  4. Test for 0.8-1.4 V between the signal circuit terminals listed below and ground:
    • Signal circuit 1 terminal 17
    • Signal circuit 1 terminal 18
    • Signal circuit 2 terminal 20
    • Signal circuit 2 terminal 21
    • If less than 0.8 V 
    1. Vehicle OFF, disconnect the X1 harness connector at the T6 Power Inverter Module.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the T6 Power Inverter Module.
    • If greater than 1.4 V 
    1. Vehicle OFF, disconnect the X1 harness connector at the T6 Power Inverter Module, Vehicle ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the T6 Power Inverter Module.
    • If between 0.8-1.4 V 
  5. Test for 6.5-7.5 V DC between the reference circuit terminals listed below and ground:
    • Terminal 15
    • Terminal 16
    • If less than 6.5 V 
    1. Vehicle OFF, disconnect the X1 harness connector at the T6 Power Inverter Module.
    2. Test for infinite resistance between the reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the T6 Power Inverter Module.
    • If greater than 7.5 V 
    1. Vehicle OFF, disconnect the X1 harness connector at the T6 Power Inverter Module, Vehicle ON.
    2. Test for less than 1 V DC between the reference circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the T6 Power Inverter Module.
    • If between 6.5-7.5 V 
  6. Verify DTC P0A45, P0A46, P0C57, P0C58, P0C61, P0C62, and P1B04 is not set.
    • If any of the DTCs are set 
    1. Program the T6 Power Inverter Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the T6 Power Inverter Module.
      • If the DTC does not set.
    3. All OK.
    • If none of the DTCs are set 
  7. All OK.
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