LEMON Manuals: Even more car manuals for everyone
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 P3409, P3411, P3412, P3433, P3435, or P3436: Cylinder Deactivation 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.
    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 Q83 Valve Lifter Oil 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.
    2. With fuse removed, 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 and the fuse is good.
    • If the test lamp does not illuminate and the fuse is open 
    1. Ignition OFF.
    2. 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 cylinder deactivation solenoid valve control circuit terminal listed below.
    • Cylinder 2 Deactivation Solenoid Valve terminal 2
    • Cylinder 5 Deactivation Solenoid Valve terminal 2
    • If the test lamp illuminates 
    1. Ignition OFF, remove the test lamp, disconnect the X4 harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the cylinder deactivation 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 cylinder deactivation solenoid valve control circuit terminal listed below.
    • Cylinder 2 Deactivation Solenoid Valve terminal 2
    • Cylinder 5 Deactivation Solenoid Valve terminal 2
    • If the test lamp illuminates 
    1. Ignition OFF, remove the test lamp, disconnect the X4 harness connector at the K20 Engine Control Module, ignition ON.
    2. Test for less than 1 V between the cylinder deactivation 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. Ignition OFF, remove the test lamp, disconnect the X4 harness connector at the K20 Engine Control Module.
  6. Test the cylinder deactivation solenoid valve control circuit for less than 5 Ω end to end.
    • If 5 Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 5 Ω 

      Replace the Q83 Valve Lifter Oil Solenoid Valve.

scientia non olet · About LEMON Manuals