Honda Accord/Prelude 1984-1995 Repair Guide

Wheel Speed Sensor

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REMOVAL & INSTALLATION



See Figures 1, 2, 3 and 4


CAUTION
Vehicles equipped with air bag or Supplemental Restraint Systems (SRS) may have components and wiring in the same area as the front speed sensor wiring harnesses. The air bag system connectors are yellow. Do not use electrical test equipment on these circuits. Do not damage the SRS wiring while working on other wiring or components. Failure to observe correct procedures may cause the air bag system to inflate unexpectedly or render the system totally inoperative.

  1. If equipped with an air bag, disconnect the negative battery cable and properly disable the Supplemental Restraint System (SRS), as detailed in Chassis Electrical .
  2.  
  3. Raise and safely support the vehicle on jackstands as necessary for access.
  4.  

Access to the Prelude rear sensor and pulser requires removal of the wheel, caliper and brake disc.

  1. Unplug the sensor harness connector.
  2.  



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Fig. Fig. 1: Accord front wheel speed sensor mounting



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Fig. Fig. 2: Accord rear wheel speed sensor mounting

  1. Beginning at the connector end, remove grommets, clips or retainers as necessary to free the harness. Take careful note of the placement and routing of the harness; it must be reinstalled in the exact original position.
  2.  
  3. Remove the bolts holding the speed sensor to its mounting; remove the sensor. If it is stuck in place, gently tap on the side of the mounting flange with a hammer and small punch; do not tap on the sensor.
  4.  



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Fig. Fig. 3: Prelude front wheel speed sensor mounting



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Fig. Fig. 4: Prelude rear wheel speed sensor mounting

To install:
  1. Place the sensor in position and loosely install the retaining bolts. Route the harness correctly; avoid twisting or crimping the harness by using the white line on the wires as a guide.
  2.  
  3. Once the harness and sensor are correctly but loosely placed, tighten the sensor mounting bolts. Accord front and rear sensor bolts and Prelude front sensor bolts should be tightened to 16 ft. lbs. (22 Nm). Prelude rear sensor bolts are tightened only to 7 ft. lbs. (10 Nm).
  4.  
  5. Working from the sensor end to the connector, install each clip, retainer, bracket or grommet holding the sensor harness. The harness must not be twisted. Tighten the bolt(s) securing the brackets to 7 ft. lbs. (10 Nm). If the harness must pass through a body panel, make certain the rubber grommet is correctly and firmly seated.
  6.  
  7. Engage the wiring connector.
  8.  
  9. If equipped, enable the SRS system and connect the negative battery cable.
  10.  

AIR GAP INSPECTION



See Figure 5

The air gap between the tip of the sensor and the pulser is critical to the proper operation of the system. The gap is established by the correct installation of the wheel speed sensor; the gap may be measured for reference but is not adjustable.

Use a non-metallic feeler gauge to measure the gap. Rotate the hub or axle slowly by hand, taking measurements at several locations. The front or rear air gap must be 0.016-0.039 in. (0.4-1.0mm) at every location. If the gap exceeds 0.039 in. (1.0mm) at any location, there is a high probability of a damaged or distorted suspension knuckle.



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Fig. Fig. 5: An incorrect air gap may indicate damaged suspension components

Access to the Prelude rear sensor and pulser requires removal of the wheel, caliper and brake disc.

 
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