LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Controls And Fuel - 2.4L - DTC P0114 To DTC P0604) >> Diagnostic Information and Procedures >> DTC P0340, P0341, P0365, or P0366: Intake/Exhaust Camshaft Position Sensor >> 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 B23 Camshaft Position Sensor. 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 and ground.
    • If 5Ω or greater 
    1. Ignition OFF, disconnect the X3 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 2Ω or less, replace the K20 engine Control Module.
    • If less than 5Ω 
  3. Ignition ON.
  4. Test for 4.8-5.2V between the 5V reference circuit terminal A and ground.
    • If less than 4.8V 
    1. Ignition OFF, disconnect the X3 harness connector at the K20 engine Control Module.
    2. Test for infinite resistance between the 5V reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    3. Test for less than 2Ω in the 5V 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 greater than 5.2V 
    1. Ignition OFF, disconnect the X3 harness connector at the K20 engine Control Module, ignition ON.
    2. Test for less than 1V between the 5V reference 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 between 4.8-5.2V 
  5. Test for 4.8-5.2V between the signal circuit terminal C and ground.
    • If less than 4.8V 
    1. Ignition OFF, disconnect the X3 harness connector at the K20 engine Control Module.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    3. Test for less than 2Ω in the signal 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 greater than 5.2V 
    1. Ignition OFF, disconnect the X3 harness connector at the K20 engine Control Module, ignition ON.
    2. Test for less than 1V between the signal 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 between 4.8-5.2V 
  6. Verify DTC P0341 or P0366 is not set.
    • If any of the DTCs are set 

      Inspect for the conditions listed below:

    • Excessive play or looseness of the B23 Camshaft Position Sensor or the reluctor wheel
    • Improper installation of the B23 Camshaft Position Sensor
    • Foreign material passing between the B23 Camshaft Position Sensor and the reluctor wheel
    • Damaged reluctor wheel
    • Excessive air gap between the B23 Camshaft Position Sensor and the reluctor wheel
    • Engine oil for debris
    • Timing chain, tensioner, and sprockets for wear or damage
      • If any of the conditions above are found, repair as necessary.
      • If all components test normal, test or replace the B23 Camshaft Position Sensor.
    • If none of the DTCs are set 
  7. Test or replace the B23 Camshaft Position Sensor.
scientia non olet · About LEMON Manuals