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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 84 (Automatic Transmission - 6T40 (MH8 MHB) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0658 or P0659: Actuator High Control Circuit Group 1 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    You must perform the Circuit/System Verification first.

  1. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
  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 listed in the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
    • If the resistance is not within range 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If the resistance is within range 
  4. Place the Q8 Control Solenoid Valve Assembly on a clean work surface near the transmission assembly.
  5. Connect the DT-48616-10  adapter harness between the vehicle harness connector, and the Q8 Control Solenoid Valve Assembly connector. Ignition ON.
  6. Command the High Side Driver 1 ON with a scan tool.
  7. Verify the scan tool High Side Driver 1 parameter displays On.
    • If On is not displayed 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If On is displayed 
  8. Verify the scan tool parameters listed below do not display Malfunction:
    • High Side Driver 1 Circuit Low Voltage Test Status
    • High Side Driver 1 Circuit Open Test Status
    • High Side Driver 1 Circuit High Voltage Test Status
    • If Malfunction is displayed 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If Malfunction is not displayed 
  9. All OK.
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