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Home >> Pontiac >> 2008 >> Torrent GXP, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 121 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C0186 or C0196 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. 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 sensor.
  2. Ignition OFF for 60 seconds, test for less than 10 Ω 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, verify a test lamp illuminates between the 12 volt reference circuit terminal 3 and ground.
    • If the test lamp does not illuminate, test the 12 volt reference circuit for a short to ground or an open/high resistance. 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 less than 1 volt between the following serial data circuit terminal listed below and ground.
    • CAN Bus High Serial Data circuit terminal 2
    • CAN Bus Low Serial Data circuit terminal 1
    • If greater than the specified range, test the serial data circuit for a short to voltage.
  6. Ignition OFF, test for infinite resistance between the serial data circuit terminal listed below and ground.
    • CAN Bus High Serial Data circuit terminal 2
    • CAN Bus Low Serial Data circuit terminal 1
    • If less than the specified value, test the serial data circuit for a short to ground.
  7. Test for less than 2 Ω between the serial data circuit terminals listed below.
    • CAN Bus High Serial Data circuit terminal 2 at the steering position sensor harness connector and terminal 2 at the yaw rate sensor harness connector.
    • CAN Bus Low Serial Data circuit terminal 5 at the steering position sensor harness connector and terminal 1 at the yaw rate sensor harness connector.
    • If greater than the specified range, test the serial data circuit for an open/high resistance.
  8. If all circuits test normal, replace the yaw/lat sensor. If the DTC resets, replace the EBCM.
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