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Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connector of the B25B Clutch Pedal Position Sensor.
  2. Ignition OFF, test for less than 1 Ω between the low reference circuit terminal A and ground.
    • If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  3. Ignition ON, test for 4.8-5.2 V between the 5V reference circuit terminal C and ground.
    • If less than the specified range, test the 5V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
    • If greater than the specified range, test the 5V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
  4. Ignition ON, observe the scan tool CPP sensor voltage parameter for less than 0.1 V.
    • If greater than the specified value, test the signal circuit for a short to voltage. If the circuit test normal, replace the K20 Engine Control Module.
  5. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5V reference circuit terminal C. Verify that the scan tool CPP sensor parameter is between 4.8-5.2 V.
    • If not within the specified range, test the signal circuit for or a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
  6. If all circuits test normal, test or replace the B25B Clutch Pedal Position Sensor.
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