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Circuit/System Testing

C0277 06, C0277 07, C0890 03, C0890 07

  1. Ignition OFF, disconnect the harness connector at the B22 brake pedal position sensor.
  2. Ignition OFF, test for less than 60 Ω between the low reference circuit terminal C and ground.
    • If greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal A and ground.
    • If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
    • If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  4. Verify that the scan tool Brake Pedal Position Sensor parameter is less than 0.3 V.
    • If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the K9 BCM.
  5. Connect a 3 A fused jumper wire between the 5 V reference circuit terminal A and the signal circuit terminal B. Verify that the scan tool Brake Pedal Position Sensor parameter is 4.8-5.2 V
    • If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  6. If all circuits test normal, test or replace the B22 brake pedal position sensor.

C0277 09

  1. Replace the B22 BPP sensor.
  2. Perform the BPP sensor recalibration procedure. Refer to Brake Pedal Position Sensor Calibration .
  3. Operate the vehicle within the Conditions for Running and Setting the DTC and verify the DTC does not reset.
    • If the DTC resets, replace the K9 BCM.

C0277 4B

  1. Verify that the DTC sets under the Conditions for Running and Setting.
  2. Perform the BPP sensor recalibration procedure. Refer to Brake Pedal Position Sensor Calibration .
  3. Operate the vehicle within the conditions that the customer experienced and verify the DTC does not reset.
    • If the DTC resets, replace the B22 BPP sensor.
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