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Home >> Pontiac >> 2007 >> Solstice Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 41 (Anti-Lock Brake System, Traction Control System & Stability Control System) >> Diagnostic Information and Procedures >> DTC C0186 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. 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/lat sensor.
  2. Ignition OFF for 60 seconds, test for less than 5 ohms between the low reference circuit terminal 5 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
  3. Ignition ON, test for ignition voltage between the ignition voltage circuit terminal 3 and ground.
    • If not within the specified range, test the ignition voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the EBCM.
  4. Ignition OFF, disconnect the harness connector at the EBCM.
  5. Ignition ON, test for less than 1 volt between the following terminal listed below and ground.
    • CAN Bus High serial data circuit terminal 18
    • CAN Bus Low serial data circuit terminal 19
    • If greater than the specified value, test the appropriate serial data circuit for a short to voltage. If the circuit tests normal, test or replace the yaw sensor/lateral accelerometer.
  6. Ignition OFF, test for infinite resistance between the following terminal listed below and ground.
    • CAN Bus High serial data circuit terminal 18
    • CAN Bus Low serial data circuit terminal 19
    • If not the specified value, test the appropriate serial data circuit for a short to ground. If the circuit tests normal, test or replace the vehicle yaw sensor/lateral accelerometer.
  7. Test for less than 2 ohms between the appropriate serial data circuit terminals listed below.
    • CAN Bus High serial data circuit terminal 18 at the EBCM harness connector and terminal 2 at the yaw/lat sensor harness connector.
    • CAN Bus Low serial data circuit terminal 19 at the EBCM harness connector and terminal 1 at the yaw/lat sensor harness connector.
    • If greater than the specified range, test the appropriate serial data circuit for an open/high resistance. If the circuit tests normal, replace the yaw sensor/lateral accelerometer.
  8. Test for infinite resistance between the CAN Bus High serial data circuit terminal 18 and the CAN Bus Low serial data circuit terminal 19.
    • If not the specified value, repair the serial data circuits for a short together.
  9. If all circuits test normal, replace the EBCM.
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