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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 356 (Engine Controls And Fuel - 3.6L (LGX) - DTC P0446 To DTC P3436 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P25CA-P25CF: Intake Camshaft Position Actuator Park Lock Solenoid Valve Control >> 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/Vehicle & All vehicle systems » Off
  2. Disconnect the appropriate electrical connector:Q84 Camshaft Position Actuator Park Lock Solenoid Valve
  3. Ignition » On / Vehicle » In Service Mode
  4. Verify a test lamp turns On between the test points:Ignition circuit terminal 1/A & Ground
    • If the test lamp does not turn On and the circuit fuse is OK 
    1. Ignition/Vehicle » Off & Remove » Test lamp
    2. Test for less than 2 Ω between the test points:Ignition circuit terminal 1/A & Output terminal@Fuse
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω » Verify the fuse is OK and there is voltage at the fuse.
    • If the test lamp does not turn On and the circuit fuse is open 
    1. Ignition/Vehicle » Off & Remove » Test lamp
    2. Connect the electrical connector:Q84 Camshaft Position Actuator Park Lock Solenoid Valve
    3. Ignition » On / Vehicle » In Service Mode
    4. Replace the component:Fuse
    5. Verify the fuse does not open.
      • If the fuse opens and there are components connected to the circuit » Disconnect a component and repeat step 4.4
      • If the fuse opens with all components disconnected from the circuit » Repair the short to ground on the circuit.
      • If the fuse does not open after disconnecting a component from the circuit » Replace the component disconnected last.
      • If the fuse does not open with all components connected.
    6. Operate each component on the circuit, one at a time.It might be necessary to use scan tool control functions to operate the components.

      Verify the fuse does not open when any of the components are activated.

      • If the fuse opens » Replace the component that caused the fuse to open when activated.
      • If the fuse does not open.
    7. All OK.
    • If the test lamp turns On 
  5. Verify a test lamp does not turn On between the test points:Control circuit terminal 2/B & B+
    • If the test lamp turns On 
    1. Ignition/Vehicle » Off & Remove » Test lamp
    2. Disconnect the electrical connector: X3 @K20 Engine Control Module
    3. Test for infinite resistance between the test points:Control circuit terminal 2/B @Component harness & Ground
      • If less than infinite resistance » Repair the short to ground on the circuit.
      • If infinite resistance » Replace the component: K20 Engine Control Module
    • If the test lamp does not turn On 
  6. Remove » Test Lamp
  7. Perform the scan tool control function: Intake Camshaft Position Actuator Park Lock Solenoid Valve Bank 1, 2 »On

    Verify the scan tool parameter: Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit High Voltage Test Status Bank 1, 2 =OK

    • If not the specified state 
    1. Ignition/Vehicle » Off
    2. Disconnect the electrical connector: X3 @K20 Engine Control Module
    3. Test for less than 1 V between the test points:Control circuit terminal 2/B @Component harness & Ground
      • If 1 V or greater » Repair the short to voltage on the circuit.
      • If less than 1 V » Replace the component: K20 Engine Control Module
    • If the specified state 
  8. Connect a 3 A fused jumper wire between the test points:Control circuit terminal 2/B & Ignition circuit terminal 1/A
  9. Perform the scan tool control function: Intake Camshaft Position Actuator Park Lock Solenoid Valve Bank 1, 2 »On

    Verify the scan tool parameter: Intake Camshaft Position Actuator Park Lock Solenoid Valve Control Circuit High Voltage Test Status Bank 1, 2

    • If not the specified state 
    1. Ignition/Vehicle » Off & Remove » Jumper wire(s)
    2. Disconnect the electrical connector: X3 @K20 Engine Control Module
    3. Test for less than 2 Ω between the test points:Control circuit terminal 2/B @Component harness & The other end of the circuit@Control module harness
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω » Replace the component: K20 Engine Control Module
    • If the specified state 
  10. Test or replace the component:Q84 Camshaft Position Actuator Park Lock Solenoid Valve
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