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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1952 (Antilock Brake System - Hybrid 3.6L (Hp5)) >> Diagnostic Information and Procedures >> DTC C0455 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  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 greater than 4.5 V.
    • 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.
  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 3 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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