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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Manual Transaxle - F40) >> Diagnostic Information and Procedures >> DTC P0806-P0808: Clutch Pedal Position (CPP) Sensor >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connector of the B25B Clutch Pedal Position Sensor.
  2. Test for less than 5Ω between the low reference circuit terminal C and ground:
    • If 5Ω or greater 
    1. Disconnect the X1 harness connector at the K20 Engine Control Module.
    2. Test for less than 2Ω in the 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. 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 X1 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 X1 harness connector at the K20 Engine Control Module.
    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. Verify the scan tool CPP Sensor voltage parameter is less than 0.1V.
    • If 0.1V or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the K20 Engine Control Module, Ignition ON.
    2. Test for less than 1V between the signal circuit terminal B 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 less than 0.1V 
  6. Install a 3A fused jumper wire between the signal circuit terminal B and the 5V reference circuit terminal C.
  7. Verify the scan tool CPP Sensor voltage parameter is greater than 4.9V.
    • If 4.9V or less 
    1. Ignition OFF, remove the jumper wire, disconnect the X1 harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the signal circuit terminal B 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 4.9V 
  8. Test or replace the B25B Clutch Pedal Position Sensor.
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