Chrysler Full-Size Trucks 1989-1996 Repair Guide

Wheel Speed Sensors

Print

Three wheel sensors are used in the 1993-96 all-wheel ABS system, one for each front wheel, and one to monitor both rear wheels.

The sensors convert wheel speed into an electrical signal which is transmitted to the electronic control module for processing.

TESTING



Wheel sensor malfunctions are generally caused by loose connections, damaged wires or incorrect sensor air gap. Also, if the tone wheel is physically damaged, or otherwise misaligned, the sensors will be unable to receive any information which will produce a fault code in the ABS module memory. For diagnosing a suspected faulty sensor, beyond a thorough visual inspection (such as when looking for an open or short), it is recommended that the DRB II scan tool, or equivalent, be used.

REMOVAL & INSTALLATION



Front Wheel
2WD DAKOTA MODELS

See Figure 1

  1. Raise and safely support the vehicle.
  2.  
  3. Remove the front wheel.
  4.  
  5. Remove the disc brake caliper.
  6.  
  7. Remove the disc brake hub and rotor assembly.
  8.  
  9. Remove the special bolts attaching the sensor to the splash shield. If these bolts are in good condition, keep them for reuse. If they are in need of replacement, you must replace them with the same type.
  10.  
  11. Remove the clamps securing the sensor wire to the control arm and inner fender.
  12.  
  13. Unseat the grommet securing the sensor wire in the fender panel.
  14.  
  15. In the engine compartment, unplug the sensor wire from the harness connector.
  16.  
  17. Remove the clamps securing the sensor wire to the engine compartment body panels.
  18.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the front wheel speed sensor mounting-Dakota models shown

  1. Work the sensor wire out of the engine compartment and through the fender panel grommet hole. Then slide the wire out of the steering knuckle splash shield and out from the vehicle.
  2.  

To install:
  1. Guide the sensor wire through the splash shield, around the control arm and through the grommet hole in the fender panel. Do not seat the grommet in the fender panel at this time.
  2.  
  3. Position the sensor in the splash shield and install the special sensor attaching bolts. Tighten them to 13-18 ft. lbs. (18-25 Nm).
  4.  
  5. Secure the sensor wire retaining clamps to the control arm and fender panel with screws.
  6.  
  7. Seat the sensor wire grommet in the inner fender panel.
  8.  
  9. In the engine compartment, connect the sensor wire to the harness plug. Make sure the wire is not routed near any hot or rotating components.
  10.  
  11. Install the disc brake hub and rotor assembly.
  12.  
  13. Install the disc brake caliper.
  14.  
  15. Install the wheel.
  16.  
  17. One more time, check the sensor wire routing. Turn the steering wheel back-and-forth to verify the wire is clear of steering and suspension components. If it binds in any way, re-route.
  18.  
  19. Lower the vehicle.
  20.  

4WD DAKOTA MODELS

See Figure 1

  1. Raise and safely support the vehicle.
  2.  
  3. Remove the front wheel.
  4.  
  5. Remove the special bolts attaching the sensor to the steering knuckle. If the bolts are in good condition, keep them. Otherwise they will have to be replaced with new ones.
  6.  
  7. Remove the clamps that secure the sensor wire to the control arm and inner fender panel.
  8.  
  9. Unseat the grommet securing the sensor wire in the fender panel.
  10.  
  11. In the engine compartment, unplug the sensor wire from the harness connector.
  12.  
  13. Remove the clamps securing the sensor wire to the engine compartment body panels.
  14.  
  15. Work the sensor out of the engine compartment, through the fender panel grommet hole and out of the vehicle.
  16.  

To install:
  1. Guide the sensor wire through the splash shield, around the control arm and through the grommet hole in the fender panel. Do not seat the grommet in the fender panel at this time.
  2.  
  3. Position the sensor in the splash shield and install the special sensor attaching bolts. Tighten them to 13-18 ft. lbs. (18-25 Nm).
  4.  
  5. Secure the sensor wire retaining clamps to the control arm and fender panel with screws.
  6.  
  7. Seat the sensor wire grommet in the inner fender panel.
  8.  
  9. In the engine compartment, connect the sensor wire to the harness plug. Make sure the wire is not routed near any hot or rotating components.
  10.  
  11. Install the wheel.
  12.  
  13. One more time, check the sensor wire routing. Turn the steering wheel back-and-forth to verify the wire is clear of steering and suspension components. If it binds in any way, re-route.
  14.  
  15. Lower the vehicle.
  16.  

2WD PICK-UPS

See Figure 2

  1. Raise and safely support the front end of the vehicle.
  2.  
  3. Remove the wheel.
  4.  
  5. Use a prytool to press the caliper piston back into the bore.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the front wheel speed sensor mounting-2WD Pick-up design shown

  1. Remove the brake caliper bolts, then lift the caliper from the knuckle and rotor. Use a wire to suspend the caliper from the frame or chassis. Do not let it hang freely from its hose.
  2.  
  3. Remove the rotor.
  4.  
  5. Remove the special sensor attaching bolts. If they are in good condition, keep them for reuse. Otherwise, new bolts of the same type will have to be used.
  6.  
  7. Disconnect the sensor wire and remove the sensor from the vehicle.
  8.  

To install:
  1. Position the sensor and install the special bolts. Tighten them to 16-21 ft. lbs. (21-25 Nm).
  2.  
  3. Connect the sensor wire to the harness wire.
  4.  
  5. Install the rotor and brake caliper.
  6.  
  7. Install the wheel.
  8.  
  9. Lower the vehicle.
  10.  
  11. If available, use a scan tool to verify operation.
  12.  

4WD PICK-UPS
  1. Remove the bolt attaching the sensor to the inside of the steering knuckle.
  2.  
  3. In the engine compartment, unplug the sensor wire connector at the harness plug.
  4.  
  5. Remove the sensor and wire assembly.
  6.  

To install:
  1. Position the sensor on the steering knuckle. Seat the sensor locating tab in the hole in the knuckle and install the sensor attaching bolt. Tighten it to 11 ft. lbs. (14 Nm).
  2.  
  3. Route the sensor wire from the steering knuckle to the harness connector.
  4.  
  5. Check sensor wire routing. Make sure the wire is clear of all chassis components and is not twisted or kinked at any spot.
  6.  
  7. Connect the sensor wire harness in the engine compartment.
  8.  

Rear Wheel

DAKOTA MODELS

See Figure 3

  1. Raise the rear of the vehicle.
  2.  
  3. Unplug the wire from the sensor on the axle housing.
  4.  
  5. Unplug the sensor wire from the harness connector at the driver's side frame rail.
  6.  



Click image to see an enlarged view

Fig. Fig. 3: Exploded view of the rear wheel speed sensor mounting-Dakota models

  1. Unclip the sensor wire from the rear brake hose, then remove the sensor wire from the vehicle.
  2.  

To install:
  1. Connect the sensor wire to the rear sensor and harness connector at the frame rail.
  2.  
  3. Secure the sensor wire to the rear brake hose with the clips provided.
  4.  
  5. Lower the vehicle.
  6.  

PICK-UPS

See Figure 4

  1. Raise and safely support the rear of the vehicle.
  2.  
  3. Locate the sensor, its cover and mounting area on the axle and clean before proceeding.
  4.  
  5. Unplug the harness wires from the sensor.
  6.  



Click image to see an enlarged view

Fig. Fig. 4: Exploded view of the rear wheel speed sensor mounting-Pick-up models

  1. Remove the screw that secures the brake cable, brake line, sensor cover and sensor axle housing.
  2.  
  3. Remove the sensor and cover.
  4.  
  5. Cover the sensor opening in the axle housing to prevent dirt entry.
  6.  

To install:
  1. Insert the sensor in the axle housing opening.
  2.  
  3. Position the cover over the sensor and install the cover and cover attaching screw. Tighten to 18 ft. lbs. (24 Nm).
  4.  
  5. Connect the harness wires to the sensor and lower vehicle.
  6.  
  7. Lower the vehicle.
  8.  

 
label.common.footer.alt.autozoneLogo