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Home >> Buick >> 2008 >> Allure CX >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> DTC C0241 or P0856 >> Circuit/System Testing

Circuit/System Testing

  1. Disconnect the harness connector terminal 27 (ECM) or terminal 25 (PCM) at the EBCM.
  2. Ignition ON, test for 4.7 - 4.8 volts between the requested torque signal circuit Connector C2 terminal 15 (ECM) or Connector C1 terminal 15 (PCM) and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the PCM/ECM.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the PCM/ECM.
  3. If all circuits test normal, replace the EBCM.
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