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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Brake Pedal Position (BPP) Sensor Malfunction

  1. Ignition OFF, disconnect the harness connector at the B22 BPP sensor.
  2. Ignition OFF, test for less than 5 Ω between the ground circuit terminal C and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between B+ and the low reference circuit terminal C.
    • If the test lamp does not illuminate, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  4. 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.
  5. Verify the scan tool BPP Sensor parameter is less than 1 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.
  6. Install a 3 A fused jumper wire between the signal circuit terminal B and the 5 V reference circuit terminal A. Verify the scan tool BPP Sensor parameter is greater than 4 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.
  7. If all circuits test normal, test or replace the B22 BPP sensor.

Stop Lamps Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate E5 stop lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5 Ω between the ground circuit terminal 1 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 3 and ground.
  4. Command the Brake Lamp Command ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, test or replace the E5 stop lamp.

Center High Mounted Stop Lamp Malfunction

  1. Ignition OFF, disconnect the harness connector at the E6 center high mounted stop lamp.
  2. Ignition OFF, exterior lamps OFF, test for less than 5.0 Ω between the ground circuit terminal 2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 1 and the ground circuit terminal 2.
  4. Command the Center Brake Lamp Command Test ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  5. If all circuits test normal, replace the E6 center high mounted stop lamp.
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