LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 118 (Engine Controls And Fuel - 3.6L (LF4 LGX) - DTC P0685 LGX To DTC P3436 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P25CA-P25CF: Intake Camshaft Position Actuator Park Lock Solenoid (LGX) >> 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.
    NOTE:

    If any of the scan tool circuit status parameters displayed "Malfunction" during the Circuit/System Verification, inspect the wiring harness for signs of chaffing or pinching before intake manifold removal.

  1. Ignition OFF, disconnect the harness connector at the appropriate Q84 Camshaft Position Actuator Park Lock Solenoid Valve, ignition ON.
  2. Verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
    • If the test lamp does not illuminate and the fuse is good. 
    1. Ignition OFF, remove the test lamp.
    2. Test for less than 5 Ω between the ignition circuit terminals 1 and the fuse terminal.
      • If 5 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 5 Ω, verify there is voltage at the fuse.
    • If the test lamp does not illuminate and the fuse is open 
    1. Ignition OFF, test for infinite resistance between the ignition circuit terminal 1 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, test all the components connected to the ignition circuit and repair or replace as necessary.
    • If the test lamp illuminates 
  3. Verify that a test lamp does not illuminate between the ignition circuit terminal 1 and the appropriate camshaft solenoid valve control circuit terminal listed below.
    • Q84A Camshaft Position Actuator Lock Solenoid Valve terminal 2
    • Q84B Camshaft Position Actuator Lock Solenoid Valve terminal 2
    • If the test lamp illuminates 
    1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the camshaft solenoid valve control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K20 Engine Control Module.
    • If the test lamp does not illuminate 
  4. Verify that a test lamp does not illuminate between ground and the camshaft solenoid valve control circuit terminal listed below.
    • Q84A Camshaft Position Actuator Lock Solenoid Valve terminal 2
    • Q84B Camshaft Position Actuator Lock Solenoid Valve terminal 2
    • If the test lamp illuminates 
    1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module, ignition ON.
    2. Test for less than 1 V between the camshaft solenoid valve 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. Verify test lamp flashes between control circuit terminal 2 and B+ while commanding the Intake Camshaft Actuator Park Lock Solenoid Valve On with a scan tool.
    • If the test lamp does not flash  
    1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
    2. Test the camshaft solenoid valve control circuit for less than 2 Ω 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 the test lamp flashes  
  6. Replace the Q84 Camshaft Position Actuator Park Lock Solenoid Valve.
scientia non olet · About LEMON Manuals