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Home >> Chevrolet >> 2008 >> Chevy Express G2500, Van Passenger >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> DTC C0161 (W/JL4) >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the stop lamp harness connector at the stop lamp switch.
  2. Test for less than 1.0 ohm between the ground circuit terminal A and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool EBCM brake pedal position sensor data parameter is Released.
    • If not the specified value, test the signal circuit terminal D for a short to ground. If the circuit tests normal, replace the EBCM.
  4. Install a 3A fused jumper wire between the signal circuit terminal D and the ground circuit terminal A. Verify the scan tool EBCM brake pedal positionparameter is OFF.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the EBCM.
  5. If all circuits test normal, test or replace the stop lamp switch.
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