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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls And Fuel - 2.4L - DTC P0010 To DTC P0114 (LUK)) >> Diagnostic Information and Procedures >> DTC P0010, P0013, or P2088, P2089, P2090, P2091: Camshaft Position Actuator Solenoid >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition Off and all vehicle systems Off, disconnect the harness connector at the appropriate Q6 Camshaft Position Actuator Solenoid Valve. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 5Ω between the low reference circuit terminal B or 2 and ground.
    • If 5Ω or greater 
    1. Ignition Off, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for less than 2Ω in the low reference circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit
      • If less than 2Ω, replace the K20 Engine Control Module
    • If less than 5Ω 
  3. Ignition On.
    4. NOTE:

    A test lamp must be used for this test. The control circuit is pulled-up to a low current voltage, 1.5-3.5V on the control circuit is normal.

  4. Verify that a test lamp does not illuminate between the control circuit terminal A or 1 and ground.
    • If the test lamp illuminates 
    1. Ignition Off, disconnect the harness connector at the K20 Engine Control Module, ignition On.
    2. Test for less than 1V between the control circuit and ground.
    • If 1V or greater, repair the short to voltage on the circuit
    • If less than 1V, replace the K20 Engine Control Module.
    • If the test lamp does not illuminate 
  5. Remove the test lamp.
  6. Connect the DMM black lead to the control circuit terminal A or 1. Connect the DMM red lead to B+. Set the DMM on the diode setting. Command the CMP actuator solenoid On and Off with a scan tool. The DMM should transition from OL when commanded Off to less than 1V when commanded On.
    • If the circuit voltage does not correspond to the specified values 
    1. Ignition Off, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for less than 2Ω in the control circuit end to end.
      • If 2Ω or greater, repair the open/high resistance or short to ground in the circuit
      • If less than 2Ω, replace the K20 Engine Control Module.
    • If the circuit voltage corresponds to the specified values 
  7. Test or replace the Q6 Camshaft Position Actuator Solenoid Valve.
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