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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Automatic Transmission - 8L90 (M5U) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0960, P0962, P0962, P0964, P0966, P0967, P0968, P0970, P0971, P2736, P2738, P2739, P2812, P2814, P2815, P2824, P2826, Or P2827: Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 Control Circuit(s) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On/Vehicle - In Service Mode
  2. Verify the scan tool parameter:
    • Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 Control Circuit High Voltage Test Status = OK or Not Run
    • Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 Control Circuit Low Voltage Test Status = OK or Not Run
    • Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 Control Circuit Open Test Status = OK or Not Run
    • If not the specified state 

      Refer to Circuit/System Testing.

    • Go to next step: If the specified state 
  3. Verify the scan tool parameter:
    • Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 Control Circuit High Voltage Test Status = OK or Not Run
    • Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 Control Circuit Low Voltage Test Status = OK or Not Run
    • Transmission Control Solenoid Valve 1, 2, 3, 6, 7, 9 Control Circuit Open Test Status = OK or Not Run
    • Perform the action while monitoring the parameter:
    • Wiggle the harness and connector: X175 @ T12 Automatic Transmission Assembly
    • Wiggle the harness and connector: K71 Transmission Control Module
    • If not the specified state 

      Repair as necessary - Wiring/Terminal(s)/Electrical Connector(s)

    • Go to next step: If the specified state 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  5. Verify the DTC does not set.
    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  6. All OK.
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