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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 112 (Engine Controls And Fuel - 2.0L (LTG) Or 2.5L (LCV) - DTC P0325 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P05CC or P05CE: Cold Start Camshaft Position System >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition/Vehicle Off and all vehicle systems Off, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 5 Ω between the low reference circuit terminal 2 or B and ground.
    • If 5 Ω or greater 
    1. Ignition/Vehicle Off, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for less than 2 Ω in the low reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K20 Engine Control Module.
    • If less than 5 Ω 
  3. Engine Running.
  4. Verify the appropriate scan tool Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status does not display Malfunction.
    • If Malfunction is displayed 
    1. Ignition/Vehicle Off, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the control circuit.
      • If infinite resistance, replace the K20 Engine Control Module.
    • If Malfunction is not displayed 
  5. Ignition/Vehicle Off, install a 3 A fused jumper wire between the control circuit terminal 1 or A and ground, engine Running.
  6. Verify the appropriate scan tool Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status displays Malfunction.
    • If Malfunction is not displayed 
    1. Ignition/Vehicle Off, remove the fused jumper, and disconnect the harness connector at the K20 Engine Control Module, ignition On/vehicle in Service Mode.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage in the circuit.
      • If less than 1 V
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K20 Engine Control Module.
    • If Malfunction is displayed 
    7. NOTE:

    If debris is found on Q6 Camshaft Position Actuator Solenoid Valve screens, clean the screens and reinspect for damage. If the screens are not damaged, reinstall in the engine.

  8. Ignition/Vehicle Off, remove the Q6 Camshaft Position Actuator Solenoid Valve.
  9. Verify the following conditions do not exist:
    • Damaged, restricted, or missing screens on the Q6 Camshaft Position Actuator Solenoid Valve.
    • Surface damage or an engine oil leak between the oil sealing lands of the Q6 Camshaft Position Actuator Solenoid Valve.
    • Oil seepage at the Q6 Camshaft Position Actuator Solenoid Valve connector.
    • If a condition is found. 

      Replace the Q6 Camshaft Position Actuator Solenoid Valve.

    • If a condition is not found 
    10. NOTE:

    After exchanging the solenoids, install jumper wires to the appropriate terminals of the harness connectors and the solenoids if necessary.

  10. Exchange the suspect Q6 Camshaft Position Actuator Solenoid Valve with the Q6 Camshaft Position Actuator Solenoid Valve that is operating correctly.
  11. Operate the vehicle within the Conditions for Running the DTC.
  12. Verify the original DTC does not set.
    • If the DTC sets 

      Replace or repair the mechanical camshaft position actuator

    • If the DTC does not set 
  13. Test or replace the suspect Q6 Camshaft Position Actuator Solenoid Valve.
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