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Home >> GMC >> 2020 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 1.5L (LYX) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P0010-P0014 or P2088-P2091 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
NOTE:
  • The engine oil level and the oil pressure are critical to the correct operation of the system.
  • Engine oil condition has a major impact on the camshaft actuator system.
  • If a crankshaft or camshaft position sensor DTC is set, the scan tool camshaft position actuator output control will be disabled.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0335, P0336, P0340, P0341, P0365, P0366 is not set.
    • Go to next step : If none of the DTCs are set 
  3. Verify the following conditions do not exist :
    • If a condition exists 

      Repair as necessary

    • Go to next step : If no condition exists 
  4. Engine idling.
  5. Perform the appropriate scan tool control function :
    • Exhaust Camshaft Position Actuator - From 0 to 10° and back to 0°.
    • Intake Camshaft Position Actuator - From 0 to 10° and back to 0°.
    • Verify the appropriate scan tool parameter :
    • Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status = OK or Not Run
    • Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status = OK or Not Run
    • Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status = OK or Not Run
    • Intake Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status = OK or Not Run
    • Intake Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status = OK or Not Run
    • Intake Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status = OK or Not Run
    • If not the specified state 

      Refer to : Circuit/System Testing

    • Go to next step : If the specified state 
  6. Perform the appropriate scan tool control function :
    • Exhaust Camshaft Position Actuator - From 0 to 10° and back to 0°.
    • Intake Camshaft Position Actuator - From 0 to 10° and back to 0°.
    • Verify the appropriate scan tool parameter :
    • Exhaust Camshaft Position Variance = Less than 2° - During each of the commanded states
    • Intake Camshaft Position Variance = Less than 2° - During each of the commanded states
    • If 2° or greater 

      Refer to : Circuit/System Testing

    • Go to next step : If less than 2° 
  7. Verify the scan tool parameter :
    • Intake Camshaft Position Variance = Less than 2°
    • Exhaust Camshaft Position Variance = Less than 2°
    • Perform the action while monitoring the parameter :
    • Wiggle the harness and connector : Q6 Camshaft Position Actuator Solenoid Valve
    • Wiggle the harness and connector : K20 Engine Control Module
    • If 2° or greater 

      Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)

    • Go to next step : If less than 2° 
  8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to : Circuit/System Testing

    • Go to next step : If the DTC is not set 
  9. All OK.
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