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Home >> Cadillac >> 2008 >> Escalade RWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System - Non-Hybrid Less Than 3900 Kg (8600 Lb) GVW With TCS & VSES >> Diagnostic Information and Procedures >> DTC C0455 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the steering angle sensor.
  2. Ignition OFF, test for less than 5.0 ohm between the low reference circuit terminal 2 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 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and ground.
    • 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.
  4. Verify the scan tool Steering Wheel Sensor Signal parameter is less than 1 volt.
    • If greater than the specified range, test the signal circuit terminal 6 for a short to voltage. If the circuit tests normal, replace the EBCM.
  5. Install a 3A fused jumper wire between the signal circuit terminal 6 and the 5-volt reference circuit terminal 1. Verify the scan tool Steering Wheel Sensor Signal parameter is greater than 4.5 volts.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  6. Verify the scan tool Digital SWPS Phase A parameter is High.
    • If not the specified parameter, test the signal circuit terminal 7 for a short to ground. If the circuit tests normal, replace the EBCM.
  7. Install a 3A fused jumper wire between the signal circuit terminal 3 and the low reference circuit terminal 2. Verify the scan tool Digital SWPS Phase A parameter is Low.
    • If not the specified parameter, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the EBCM.
  8. Verify the scan tool Digital SWPS Phase B parameter is High.
    • If not the specified parameter, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the EBCM.
  9. Install a 3A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 2. Verify the scan tool Digital SWPS Phase B parameter is Low.
    • If not the specified parameter, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the EBCM.
  10. Ignition ON, test for B+ between the signal circuit terminal 5 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  11. If the circuits test normal, replace the steering angle sensor.
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