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DTC C0221: Right Front Wheel Speed Sensor Circuit Open: Diagnosis

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  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK. After performing diagnostic system check, go to next step.
  2. Turn ignition off. Disconnect 4-pin EBCM harness connector. Check resistance between 4-pin harness connector terminals "C" and "E". See WSS TEMPERATURE-VS-SENSOR RESISTANCE  table. If resistance is as specified, go to step 5)  . If not, go to next step.
  3. Disconnect right WSS harness connector. Using a fused jumper wire, jumper sensor harness connector terminals "A" and "B". Using DVOM, check resistance between 4-pin EBCM harness connector terminals "C" and "E". If resistance is 0-2 ohms, go to next step. If not, go to step 10)  .
  4. Check resistance between right WSS harness connector terminals "A" and "B". See WSS TEMPERATURE-VS-SENSOR RESISTANCE  table. If resistance is as specified, go to step 7)  . If not, go to step 11)  .
  5. Inspect 4-pin EBCM harness connector for signs of damage or corrosion. If damage is present, go to step 8)  . If no signs of damage are present, go to next step.
  6. Reconnect all harness connectors. Test drive vehicle at speed greater than 15 MPH. If DTC C0221 sets, go to step 9)  . If not, go to next step.
  7. Malfunction is intermittent. Check all connectors and harnesses for damage which may result in high resistance when components are connected. See DIAGNOSTIC AIDS .
  8. Repair 4-pin EBCM harness connector.
  9. Replace EBCM.
  10. Repair open or high resistance in wheel speed sensor circuits between sensor and EBCM.
  11. Replace wheel speed sensor.
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