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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Automatic Transmission - 6L80 (MYC) Or 6L90 (MYD) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P2728, P2729, Or P2730: Pressure Control (PC) Solenoid Valve 5 >> Circuit/System Testing

Circuit/System Testing

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    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 

      Clean as necessary.

    • Go to next step: 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

    • Go to next step: 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 listed below do not display Malfunction:
    • Pressure Control Solenoid Valve 5 Performance Test Status
    • Pressure Control Solenoid Valve 5 Control Circuit High Voltage Test Status
    • Pressure Control Solenoid Valve 5 Control Circuit Low Voltage Test Status
    • If Malfunction is displayed 

      Replace the Q8 Control Solenoid Valve Assembly.

    • Go to next step: If Malfunction is not displayed 
  7. All OK.
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