LEMON Manuals: Even more car manuals for everyone
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 P0A2B-P0A2D or P0A31-P0A33 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the X175/X176 harness connector at the T12 Automatic Transmission Assembly, connect the DT-48493  jumper harness to the vehicle harness side only.
    2. NOTE:

    The ignition must be ON to test the low reference circuit. Other DTCs will set with the X175/X176 connector disconnected.

  2. Ignition ON.
  3. Test for less than 10 ohms between the low reference circuit terminals listed below and ground for the appropriate drive motor:
    • Drive motor 1 low reference circuit terminal 19
    • Drive motor 2 low reference circuit terminal 23
    • If 10 Ω or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the T6 Power Inverter Module.
    2. Test for less than 2 Ω in the low 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 less than 10 Ω 
  4. Verify the scan tool motor control module Motor Temperature Sensor parameter is greater than 4.42 V.
    • If 4.42 V or less 
    1. Ignition OFF, disconnect the X1 harness connector at the T6 Power Inverter Module.
    2. Test for infinite resistance between the signal circuit terminal listed below and ground for the appropriate drive motor:
    • Drive motor 1 sensor circuit terminal 13
    • Drive motor 2 sensor circuit terminal 22
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the T6 Power Inverter Module.
    • If greater than 4.42 V 
  5. Install a 3 A fused jumper wire between the signal circuit terminal and the low reference circuit terminal listed below for the appropriate drive motor:
    • Drive motor 1 circuit terminals 13 and 19
    • Drive motor 2 circuit terminals 22 and 23
  6. Verify the scan tool motor control module motor temperature sensor parameter is less than 0.29 V.
    • If 0.29 V or greater 
      NOTE:

      If a short to voltage is found, test the motor temperature sensor for damage.

    1. Ignition OFF, remove the jumper wire, disconnect the X1 harness connector at the T6 Power Inverter Module, ignition 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
    3. Ignition OFF.
    4. 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 less than 0.29 V 
  7. Refer to Component Testing .
scientia non olet · About LEMON Manuals