CCU 600006.31 – Default DTC

CCU 600006.31 (CCU )

Code: 600006.31



This default diagnostic trouble code (DTC) is triggered when a solenoid is commanded on, and the return voltage is outside the expected range (less than 0.75 V or greater than 2.00 V) for more than 2 seconds. This condition indicates a potential fault in the solenoid or its circuit.


The functionality of the affected system is degraded due to the incorrect return voltage from the solenoid.


  • Inspect Solenoid and Circuit:
    • Check the solenoid for proper operation. Ensure it is not stuck or malfunctioning.
    • Inspect the wiring and connections associated with the solenoid for damage, corrosion, or loose connections. Repair or replace as necessary.
  • Measure Return Voltage:
    • Use a multimeter to measure the return voltage from the solenoid. Verify that it falls within the expected range (0.75 V to 2.00 V).
    • Identify and correct any deviations from the specified voltage range.
  • Test Solenoid Driver:
    • Ensure that the solenoid driver is functioning correctly and providing the correct commands to the solenoid.
    • Replace the solenoid driver if it is found to be faulty.
  • System Reset and Monitoring:
    • After making necessary repairs or adjustments, reset the CCU and monitor the system to ensure the fault does not reoccur.


Maintaining accurate voltage levels and ensuring the proper operation of solenoids and their circuits are essential for the reliable performance of the vehicle’s systems. Regular inspections and prompt attention to voltage discrepancies can prevent operational disruptions.

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