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Test A: Right Front Sensor And Circuit

  1. DTC 31 & 41: Check Right Front Wheel Sensor Circuits

    Disconnect 16-pin connector on jumper from HCU assembly to chassis harness connector. See COMPONENT LOCATIONS  . Measure resistance between HCU assembly 16-pin chassis harness connector terminals No. 2 (Yellow/Red wire) and 13 (Yellow/Black wire). See Fig 1 . If resistance is 1015-1245 ohms, go to step 3). If resistance is not 1015-1245 ohms, go to next step.

  2. Check Right Front Wheel Speed Sensor

    Disconnect right front wheel sensor harness connector. Measure resistance between wheel sensor connector terminals. If resistance is 1015-1245 ohms, repair circuit No. 514 (Yellow/Red wire) or No. 516 (Yellow/Black wire) between wheel sensor and HCU 16-pin harness connector. If resistance is not 1015-1245 ohms, replace right front wheel sensor.

  3. Check Wiring At Jumper Harness

    Remove cover from HCU. Disconnect jumper harness from ABS control module. Check for broken or damaged wire in jumper harness. If wires are okay, go to next step. If wires are not okay, replace broken or damaged wire in jumper harness.

  4. Check Right Front Wheel Sensor Circuit Short To Ground

    Remove cover from HCU. Disconnect jumper harness from ABS control module. Using a DVOM check resistance between ABS control module 14-pin connector terminal No. 8 (Yellow/Red wire) and terminal No. 14 (Yellow/Black wire). Also check resistance between ABS control module 14-pin connector terminal No. 14 (Yellow/Black wire) and ground. If resistance is more than 5 ohms, go to next step. If resistance is 5 ohms or less, Repair Yellow/Red wire and Yellow/Black wire in jumper harness. If wires are okay replace right front rear wheel sensor.

  5. Check Right Front Wheel Speed Sensor Air Gap

    Remove right front wheel and check for damage to sensor or sensor indicator. Verify air gap between sensor and sensor indicator is within 0.20-0.37 inch (.5mm-.95mm). If air gap is not as specified, check for excessive axle bearing end play and adjust sensor position as required. If air gap is okay and warning light remains ON constantly, replace ABS control module.
Fig 1: Identifying HCU Jumper Harness 16-Pin Connector Terminals
G95G13173Courtesy of FORD MOTOR CO.
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