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Home >> Chevrolet >> 2008 >> Uplander Base, 3.9 1 >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> DTC C0870 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the appropriate sensor.
  2. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal and ground for the sensor listed below:
    • Steering wheel speed position sensor 5-volt reference circuit terminal 1.
    • Yaw rate and lateral acceleration sensor 5-volt reference circuit B.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
  3. If all circuits test normal, replace the appropriate sensor.
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