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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 1061 (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 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. 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 2 ohms of resistance between the ground circuit terminal 1 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, test for 11.8 - 12.2 volts between the 12-volt reference circuit terminal 4 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.
  4. Test for 5.5-7.0 volts between the CAN circuit terminal 3 and ground.
    • If greater than the specified range, test the CAN circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
    • If less than the specified range, test the CAN circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  5. Test for 5.5-7.0 volts between the CAN circuit terminal 2 and ground.
    • If greater than the specified range, test the CAN circuit for a short to voltage. If the circuit tests normal, replace the EBCM.
    • If less than the specified range, test the CAN circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  6. Test for infinite ohm of resistance between the CAN circuit High, and Low terminals 2 and 3.
    • If less than the specified range, test the CAN circuits for a shorted to each other. If the circuit tests normal, replace the EBCM.
  7. If all circuits test normal, test or replace the yaw rate/lateral accelerometer sensor.
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