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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls And Fuel - 1.5L (LYX) - Diagnostic Information And Procedures (P0351 - P26C8) And Symptoms) >> Diagnostic Information And Procedures >> DTC P25CA, P25CB, Or P25CC: Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
    NOTE:

    Verify the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.

  1. Engine - Running@ 1, 000 to 1, 500 RPM
  2. Verify the scan tool parameter:
    • Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit High Voltage Test Status = OKorNot Run
    • Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit Low Voltage Test Status = OKorNot Run
    • Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit Open Test Status = OKorNot Run
    • If not the specified state 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified state 
  3. Verify the scan tool parameter:
    • Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit High Voltage Test Status = OKorNot Run
    • Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit Low Voltage Test Status = OKorNot Run
    • Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit Open Test Status = OKorNot Run
    • Perform the action while monitoring the parameter:
    • Wiggle the harness and connector:Q84 Camshaft Position Actuator Park Lock Solenoid Valve
    • Wiggle the harness and connector:K20 Engine Control Module
    • If not the specified state 

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

    • Go to next step: If the specified state 
  4. 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 
  5. All OK.