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Home >> Cadillac >> 2013 >> Escalade Hybrid, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0658 or P0659 >> Circuit/System Testing

Circuit/System Testing

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

    You must perform the Circuit/System Verification first.

  1. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement .
  2. Verify the Q8 Control Solenoid Valve Assembly is not contaminated with any debris. Refer to Control Solenoid Valve and Transmission Control Module Assembly Inspection .
    • If contaminated 

      Repair as necessary.

    • If not contaminated 
  3. Verify the resistance is within the specified range for each solenoid. Refer to Control Solenoid Valve and Transmission Control Module Assembly Inspection .
    • If resistance is not within range 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If resistance is within range 
  4. Place the Q8 Control Solenoid Valve Assembly on a clean work surface near the transmission assembly.
  5. Connect DT-47825-10  jumper harness between the vehicle wire harness electrical connector, and the Q8 Control Solenoid Valve Assembly electrical connector. Ignition ON.
  6. Verify the scan tool parameters do not display Malfunction.
    • High Side Driver 1 Circuit High Voltage Test Status
    • High Side Driver 1 Circuit Open Test Status
    • High Side Driver 1 Circuit Low Voltage Test Status
    • If Malfunction is displayed 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If Malfunction is not displayed 
  7. All OK.
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