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Left Rear Sensor Circuit Failure

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagram, see WIRING DIAGRAM.
  1. Using scan tool, read and record Wheel Speed Sensor (WSS) trouble codes. If LEFT REAR SENSOR CIRCUIT FAILURE is not set, go to TEST 13A. If LEFT REAR SENSOR CIRCUIT FAILURE is set, go to next step.
  2. Inspect WSS for damage or contamination. If WSS is faulty, replace WSS. Perform TEST VER-1A. If WSS is okay, go to next step.
  3. Turn ignition off. Disconnect CAB 37-pin connector. See Figure . Inspect, clean or repair connector as necessary. Turn ignition on. Using scan tool in voltmeter mode, check voltage on CAB connector terminal No. 28 (Light Green wire). See Figure . If any voltage is present, repair short to power in Light Green wire. Perform TEST VER-1A. If no voltage exists, go to next step.
  4. Using scan tool, check voltage on CAB connector terminal No. 19 (Light Green/Dark Blue wire). If any voltage is present, repair short to power in Light Green/Dark Blue wire. Perform TEST VER-1A. If no voltage exists, go to next step.
  5. Turn ignition off. Using scan tool in ohmmeter mode, check resistance of CAB connector terminal No. 28 (Light Green wire). If resistance is less than 5 ohms, repair short to ground in Light Green wire. Perform TEST VER-1A. If resistance is more than 5 ohms, go to next step.
  6. Using scan tool, check resistance of CAB connector terminal No. 19 (Light Green/Dark Blue wire). If resistance is less than 5 ohms, repair short to ground in Light Green/Dark Blue wire. Perform TEST VER-1A. If resistance is more than 5 ohms, go to next step.
  7. Using an external ohmmeter, check resistance between CAB connector terminals No. 19 (Light Green/Dark Blue wire) and No. 28 (Light Green wire). If resistance is 950-1250 ohms, replace CAB. Perform TEST VER-1A. If resistance is not 950-1250 ohms, go to next step.
  8. Disconnect left rear WSS connector. Inspect, clean or repair connector as necessary. Using an external ohmmeter, check resistance between WSS male connector terminals. If resistance is not 950-1250 ohms, replace WSS. Perform TEST VER-1A. If resistance is 950-1250 ohms, go to next step.
  9. Connect a jumper wire between chassis ground and CAB connector terminal No. 28 (Light Green wire). Using scan tool in ohmmeter mode, check resistance of Light Green wire at left rear WSS female connector. If resistance is more than 5 ohms, repair open in Light Green wire. Perform TEST VER-1A. If resistance is less than 5 ohms, repair open in Light Green/Dark Blue wire. Perform TEST VER-1A.
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