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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 354 (Engine Controls And Fuel - 3.6L (LGX) - DTC P0010 To DTC P0459) >> Diagnostic Information and Procedures >> DTC P0011, P0014, P0021, or P0024: Intake/Exhaust Camshaft Position System >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition Off, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 5 Ω between the low reference circuit terminal 2 and ground.
    • If 5 Ω or greater 
    1. Ignition 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. Ignition On.
  4. Verify that a test lamp does not illuminate between the control circuit terminal 1 and ground.
    • If the test lamp illuminates 
    1. Ignition Off, disconnect the harness connector at the K20 Engine Control Module, ignition On.
    2. Test for less than 1 V between the control circuit and ground.
    • If 1 V or greater, repair the short to voltage on the circuit.
    • If less than 1 V, replace the K20 Engine Control Module.
    • If the test lamp does not illuminate 
    5. NOTE:

    A test lamp must be used for this test. The control circuit is pulled-up to a low current voltage, 1.5-3.5 V on the control circuit is normal.

  5. Verify the test lamp illuminates when commanding the appropriate Camshaft Position Actuator Solenoid Valve On with a scan tool.
    • If the test lamp does not illuminate 
    1. Ignition Off, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for less than 2 Ω in the control circuit end to end.
    • If 2 Ω or greater, repair the open/high resistance or short to ground in the circuit.
    • If less than 2 Ω, replace the K20 Engine Control Module.
    • If the test lamp illuminates 
  6. Ignition Off, remove the Q6 Camshaft Position Actuator Solenoid Valve.
  7. Verify the conditions listed below do not exist with the Q6 Camshaft Position Actuator Solenoid Valve:
    • Torn, restricted, mis-positioned, or missing screens.
    • Engine oil leak between the oil sealing lands of the solenoid. Inspect the lands of the solenoid for nicks.
    • Oil seepage at the solenoid connector.
    • If a condition is found 

      Replace the Q6 Camshaft Position Actuator Solenoid Valve.

    • If a condition is not found 
  8. Test or replace the Q6 Camshaft Position Actuator Solenoid Valve.
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