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Home >> Saturn >> 2009 >> Sky Red Line, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 117 (Anti-Lock Brake System, Traction Control System & Stability Control System) >> Diagnostic Information & Procedures >> DTC C0186 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Saturn Sky and 2008 Pontiac Solstice. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the yaw rate/lateral accelerometer.
  2. Test for less than 6 ohm of resistance between the low reference circuit terminal 6 and ground.
    • If greater than the specified range, test for an open/high resistance in the low reference circuit. If the circuit tests normal, replace the EBCM.
  3. Ignition ON, test for 11.8-12.2 volts between the 12-volt reference circuit terminal 3 and ground.
    • If less than the specified range, test the 12-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 12-volt reference circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
  4. Ignition OFF, disconnect the harness connector at the steering angle sensor.
  5. Ignition ON, test for 0 volts between the communication circuit terminal 5 and ground.
    • If greater than the specified value, test the communication circuit for a short to voltage.
  6. Test for 0 volts between the communication circuit terminal 2 and ground.
    • If greater than the specified value, test the communication circuit for a short to voltage.
  7. Ignition OFF, test for infinite resistance between the communication circuit terminal 5 and ground.
    • If not the specified value, test the communication circuit for a short to ground.
  8. Test for infinite resistance between the communication circuit terminal 2 and ground.
    • If not the specified value, test the communication circuit for a short to ground.
  9. Test for less than 1 ohm of resistance between the yaw rate sensor circuit terminals 1 and steering wheel sensor terminal 5.
    • If greater than the specified range, test the communication circuit for an open/high resistance.
  10. Test for less than 1 ohm of resistance between the yaw rate sensor circuit terminal 2 and steering wheel sensor terminal 2.
    • If greater than the specified range, test the communication circuit for an open/high resistance.
  11. Test for infinite resistance between the communication circuit 5 and the communication circuit 2.
    • If not the specified value, test the communication circuits for a short together.
  12. If all circuits test normal, replace the yaw rate/lateral sensor.
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