Isuzu I-280, I-350 2005-06

Wheel Speed Sensors

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Removal & Installation




NOTE
The wheel hub and speed sensor are serviced as an assembly. They are not service as individual items.

  1. Raise the vehicle.
  2.  
  3. Remove the front brake caliper.
  4.  
  5. Remove the antilock brake system (ABS) speed sensor wiring harness from the upper control arm.

    Click image to see an enlarged view

    Fig. Removing the Antilock Brake System (ABS) speed sensor wiring harness from upper control arm

  6.  
  7. Remove the front retaining bolt for the speed sensor bracket at the upper control arm.

    Click image to see an enlarged view

    Fig. Removing the front retaining bolt for the speed sensor bracket at the upper control arm

  8.  
  9. Remove the speed senor bracket from the upper control arm.
    NOTE
    Mark the holes used to mount the speed sensor electrical connector before removing. This will ensure the proper location of the speed sensor electrical connector for installation.



    Click image to see an enlarged view

    Fig. Removing the speed sensor bracket from the upper control arm

  10.  
  11. Remove the speed sensor electrical connector from the body.
    NOTE
    The following service procedure is to ensure that the speed sensor wiring harness is properly positioned so that the length of the wiring harness is correct for installation. Failure to do so could cause damage to the speed sensor wiring harness.



    Click image to see an enlarged view

    Fig. Removing the speed sensor electrical connector from the body

  12.  
  13. Using white or bright colored paint, mark the location of the speed sensor wiring harness to the steering knuckle.

    Click image to see an enlarged view

    Fig. Mark the location of the speed sensor wiring harness to the steering knuckle

  14.  
  15. To ensure the ease of removal, bundle speed sensor wiring harness so not to have it entangled in any of the suspension components.
    NOTE
    The following service procedure applies to those vehicles that are equipped with 4 wheel drive ONLY.

  16.  
  17. Remove the steering knuckle assembly.

    Click image to see an enlarged view

    Fig. Remove the steering knuckle assembly

  18.  
  19. Remove the mounting bolts for the wheel bearing/hub, brake rotor assembly.

    Click image to see an enlarged view

    Fig. Removing the mounting bolts for the wheel bearing/hub, brake rotor assembly

  20.  
  21. Remove the wheel bearing/hub, brake rotor assembly from the steering knuckle.
    NOTE
    Perform the following service procedure with the brake rotor on a flat surface.



    Click image to see an enlarged view

    Fig. Removing the wheel bearing/hub, brake rotor assembly from steering knuckle

  22.  
  23. Remove the mounting bolt from the wheel bearing/hub, to the brake rotor.
    NOTE
    The splash shield will come off the steering knuckle when the wheel bearing/hub, brake rotor is removed.



    Click image to see an enlarged view

    Fig. Remove the mounting bolt from the wheel bearing/hub to the brake rotor

  24.  
  25. Remove the wheel bearing/hub from the brake rotor.
  26.  
  27. Clean the contact area between the wheel bearing/hub and the brake rotor.

    Click image to see an enlarged view

    Fig. Remove the wheel bearing/hub from brake rotor

  28.  

To install:

  1. Position the wheel bearing/hub assembly on the brake rotor.
  2.  
  3. Install the mounting bolts from the wheel bearing/hub assembly to the brake rotor.
    WARNING
    The following service procedure is to be performed on a flat surface and to ensure that the brake rotor is securely attached to the hub assembly prior to the final torquing procedure. DO NOT use air tools of any type for this procedure.

  4.  
  5. Tighten the bolts in crisscross pattern. Tighten the mounting bolts to 15 ft. lbs. (20 Nm).
  6.  
  7. Install the backing plate to the wheel bearing/hub, brake rotor assembly.
    NOTE
    The following service procedure applies to those vehicles that are equipped with 4 wheel drive ONLY.

  8.  
  9. Install the steering knuckle assembly.
  10.  
  11. Install the wheel bearing/hub, brake rotor assembly in the steering knuckle.
  12.  
  13. Align the wheel speed sensor wiring harness with the reference mark on the steering knuckle.
    WARNING
    When performing the following service procedure, DO NOT use air tools of any type to torque the brake rotor to hub bolts.



    Click image to see an enlarged view

    Fig. Align the wheel speed sensor wiring harness with the reference mark on the steering knuckle

  14.  
  15. Install the wheel bearing/hub, brake rotor mounting bolts. Tighten the mounting bolts to 92 ft. lbs. (125 Nm).

    Click image to see an enlarged view

    Fig. Installing the wheel bearing/hub, brake rotor mounting bolts

  16.  
  17. Install the brake caliper mounting bracket to the steering knuckle.
  18.  
  19. Install the mounting bolts for the brake caliper mounting bracket. Tighten the mounting bolts to 129 ft. lbs. (175 Nm).

    Click image to see an enlarged view

    Fig. Installing the mounting bolts for the brake caliper mounting bracket

  20.  
  21. Position a large screwdriver or pry bar in the cooling fins of the brake rotor and the brake caliper mounting bracket.
    WARNING
    The following service procedure is to ensure that the brake rotor is seated properly on the wheel bearing/hub assembly.

  22.  
  23. Tighten the mounting bolts for the brake rotor in sequence.

    Click image to see an enlarged view

    Fig. Tightening the brake rotor mounting bolts in sequence

  24.  
  25. Using a torque wrench, tighten the mounting bolts. Tighten the mounting bolts to 88 ft. lbs. (120 Nm).
  26.  
  27. Install the brake caliper assembly.
  28.  
  29. Remove the tape from the speed sensor wiring harness.
  30.  
  31. Install the wheel speed sensor wiring harness bracket to the upper control arm.
  32.  
  33. Install the front retaining bolt for the speed sensor wiring harness. Tighten to retaining bolt to 14 ft. lbs. (20 Nm).

    Click image to see an enlarged view

    Fig. Install the front retaining bolt for the speed sensor wiring harness

  34.  
  35. Install the speed sensor wiring harness retainers in the upper control arm.
  36.  
  37. Reconnect the wheel speed sensor electrical connector.
  38.  
  39. Install the wheel speed sensor to the body.

    Click image to see an enlarged view

    Fig. Install the wheel speed sensor to the body

  40.  
  41. Lower the vehicle.
  42.  

 
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