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Test C - Right Front Sensor & Circuit Check

  1. DTC C1145, C1148, C1234 & C1259

    Turn ignition off. Disconnect 28-pin connector from ECU. ECU is located below HCU. Connect Breakout Box (014-00322) and ABS Adapter (007-00116) to ECU wiring harness connector. Measure resistance between breakout box pins No. 7 and 8. If resistance is not 2300-3100 ohms, go to next step. If resistance is 2300-3100 ohms, go to step 3).
  2. Disconnect right front wheel sensor connector. Measure resistance between sensor connector terminals. If resistance is not 2300-3100 ohms, replace wheel sensor. If resistance is 2300-3100 ohms, repair circuit to wheel sensor.
  3. Leave ignition off. Turn air suspension switch off (if equipped). Raise and support vehicle. Set voltmeter on AC scale. While turning right front wheel about one revolution per second, measure voltage between breakout box pin No. 7 and 8. If AC voltage is 0.1-3.5 volts, go to next step. If AC voltage is not 0.1-3.5 volts, check wheel sensor mounting and air gap. Repair or replace as necessary.
  4. Turn ignition off. Check for continuity between breakout box pin No. 7 and 13. If continuity exists, go to next step. If no continuity exists, go to step 6).
  5. Disconnect right front wheel sensor connector. Check for continuity between each sensor connector pin and ground. If continuity exists, replace sensor. If no continuity exists, repair circuit(s) to sensor.
  6. Leave right front wheel sensor connector disconnected. Check for continuity between breakout box pin No. 13 and body ground. If continuity exists, go to next step. If no continuity exists, repair circuit No. 57 (Black wire) or circuit No. 530 (Green/Yellow wire).
  7. Check right front wheel bearing for excess end play. Check front brake anti-lock sensor indicator for damaged teeth. Repair or replace as necessary. Turn air suspension switch on before lowering vehicle.
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