ABS FAULT NO DSC just put new brakes and Wheel Bearing/Hub Assembly on the front now i get abs fault

How to Replace Rear Wheel Bearing/Hub Assembly on a 2nd generation Taurus

The following procedure is for a Ford Taurus (VIN S), with rear drum brakes and ABS.

1. Loosen wheel lug nuts, raise rear of vehicle, and support securely on jack stands. Block front wheels and remove rear wheels.

2. Remove brake drum (parking brake must be off).

3. Remove and clean ABS Sensor (Torx E8) with a spritzled rag.

4. Remove grease cap from hub.

5. Remove and discard hub retaining nut (36 mm). This is a compound nut, comprised of several nuts inside a metal cage. Use a 36 mm axle nut socket (e.g., OEM 25206). Many auto parts stores will lend you this socket. A 1/2-inch drive air impact wrench or breaker bar is necessary to remove the nut.

6. Remove wheel bearing/hub assembly from spindle. It easily comes off by hand.

7. Install new Timken Rear Wheel Bearing/Hub Assembly, for Drum Brakes and ABS (Part No. 512162). Tighten new axle spindle nut (Dorman 05114) 221 lb.-ft., replace grease cap, and button everything up.

Removal

1. Raise and support the vehicle.
2. Remove the wheel and tire assembly.
3. Remove the brake caliper, caliper anchor, rotor and ABS wheel speed sensor.
4. Remove the cotter pin, nut retainer and axle hub nut.
5. Remove the hub/bearing mounting bolts from the back of the steering knuckle. Remove hub/bearing from the steering knuckle and off the axle shaft.

Installation

1. Install the hub/bearing to the knuckle.
2. Install the hub/bearing-to-knuckle bolts and tighten to specification.
3. Install the hub washer and nut. Tighten the hub nut to specification. Install the nut retainer and a new cotter pin.
4. Install the brake rotor, caliper anchor, caliper and ABS wheel speed sensor.
5. Install the wheel and tire assembly.
6. Remove the support and lower the vehicle.

Absolutely YES! The bearing and hub assembly contains the wheel speed sensor which is used by the Antilock Brake System (ABS) and the Traction Control (TC) system to see when a wheel is trying to lock up and cause skidding. The ABS will release the hydraulic pressure to the brake on that wheel and the traction control will reduce engine speed to prevent the wheel from locking up or causing you to spin out.
Many GM vehicles also commonly have problems with the wiring harnesses to the wheel speed sensors that can cause this same problem. The computer does not know WHY it cannot read the speed sensor signal. It only knows that it is not getting the signal and this is why the light is turned on. Before paying the BIG BUCKS for a wheel bearing and hub assembly, it would be wise to make absolutely certain that the problem is not being caused by a fault in the wiring harness. I have seen many mechanics automatically replace the wheel bearing only to find out that the problem still exists because they did not take the time to DIAGNOSE the problem. The fault code description says "Wheel Speed Sensor CIRCUIT fault." They see "speed sensor and automatically replace the sensor without actually checking the circuit. Not a problem unless you are the customer having to PAY for this type of guess-work!!!

There are wiring harness repair kits available for MOST GM vehicles just for this purpose.

I have included pictures of the bearing and hub assembly and the wiring harness kit to help you understand what we are talking about here.

Note the electrical connector sticking out of the hub assembly. This is the wires to the speed sensor. In the other picture, the connector at the end of the wiring harness is what plugs into the connector in the hub assembly. The other end of it gets spliced into the main vehicle harness in the engine compartment, after cutting the original harness out.

WHEEL BEARING AND HUB ASSEMBLY



WIRING HARNESS REPAIR KIT

A front brake pulsing with no ABS light is a rotor that is no longer true i.e warped. Pull off the tire and rotate the rotor. Hold a straight edge (ruler) across the outside of the rotor as your rotating the rotor. You will note that it changes distance on the straight edge / ruler as it rotates. (in out wobble) A good way to test for an out of true rotor is to drive at about 45 miles and hour and really stand on the brakes (do not lock them up) If the steering wheel and or brake pedal pulsate... you most likely have a rotor problem. If your rotor has never been "turned" it is probably time to do so.

The ABS sensor is behind the rotor on the lower control arm pointed outward toward the rotor with a flat button face. You can not see the button face with the rotor installed. If the sensor is bad you will have an ABS light. I think your troubleshooting the wrong problem. i.e rotor vs your current focus of the ABS sensor.

I would like some feed back on the running dynamic on the road brake test.

Thanks for choosing FixYa,
Kelly

technically ,,,, theres no abs hub or non abs hub.... All of the ABS components are up by the master cylinder... What you are seeing is a Speed sensor ... just unbolt brake caliper and remove the 3 or 4 bolts that hold on the hub assembly on ... and reverse order to put back on .... and as long as you dont loosen the brake line you wont have to bleed the brakes .... should only take a hour or two ...

Removal & Installation Front To Remove:
The front wheel bearings are not serviced separately. If the front wheel bearings are defective, the hub and bearing assembly must be replaced.

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Lubricate the threads on the halfshaft with clean engine oil.
3. Remove or disconnect the following:
   • Front wheels
   • Halfshaft hub nut
   • Caliper from the steering knuckle WARNING
     DO NOT allow the brake hose to support the weight of the caliper.
     
   • Brake rotor
   • Anti-lock Brake System (ABS) sensor from the backing plate
   • Hub and bearing assembly from the backing plate
   • Hub and bearing assembly from the halfshaft
   • Hub and bearing assembly

To Install:
Exploded view of the front hub mounting and related components

1. Install or connect the following:
   • Hub and bearing assembly onto the halfshaft
   • Hub and bearing assembly to the backing plate. Torque the 3 bolts alternately and evenly to 70 ft. lbs. (95 Nm).
   • ABS sensor
   • Brake rotor
   • Caliper on the steering knuckle.
   • Halfshaft nut. Torque it to 118 ft. lbs. (160 Nm).
   • Front wheel. Torque the nuts to 100 ft. lbs. (140 Nm).

Front - Remove tire, then remove brake caliper and caliper braket, remove brake rotor, some times will have little clips, remove clips, if they break ok, won't used them again, if 4X4 remove center axle nut, disconnect ABS harness, on back side of bearing, there will be three bolt's that hold hub bearing assembly, remove bolts, bearing should slide out, some time with a little help from a hammer, and your done , reverse to install new hub bearing assembly, just make sure that ABS harness is in same location that old one was when putting bearing in.

About an hour a side...This is the whole job and pictures....

The hub and wheel bearing unit is serviced as a complete assembly. Replacement of the front drive hub and bearing assembly can be done without having to remove the steering knuckle from the vehicle. However, if the hub/bearing assembly is frozen to the steering knuckle, removal of the steering knuckle is required.

1. Disconnect the negative battery cable.
   
2. Remove the cotter pin from the end of the stub axle. Remove the nut lock and spring washer. With the brakes applied, loosen, but do NOT remove the axle nut and washer with the vehicle still on the ground or damage to the wheel bearing will result.
   
3. Raise and safely support the vehicle. Remove the wheel.
   
4. Remove the front brake caliper assembly from the steering knuckle assembly and support from the strut assembly using a strong piece of wire.
   
1. Remove the front brake rotor from the hub/bearing assembly.
   
2. Remove the retaining nut and washer from the halfshaft stub axle.
   
3. Remove the ABS wheel speed sensor from the steering knuckle.
   
4. Remove the 4 hub and bearing assembly mounting bolts from behind the steering knuckle.
   
5. Remove the hub and bearing assembly from the steering knuckle.
   
5. To install:
   
   1. Thoroughly clean the mating surfaces of the steering knuckle and the hub and bearing assembly of any foreign material or nicks so the surfaces are clean and smooth.
      
   2. Install the new hub and bearing assembly and tighten the mounting bolts in a crisscross pattern to 45 ft. lbs. (65 Nm). Be sure the hub and bearing assembly is seated squarely against the front steering knuckle.
      
   3. Install the disc brake rotor.
      
   4. Install the brake caliper assembly onto the steering knuckle.
      
   5. Install the axle washer and nut. Tighten but do not torque.
      
   6. Install the ABS wheel speed sensor.
      
   7. Install the wheel and lug nuts. Torque the lug nuts, in sequence, to 95 ft. lbs. (129 Nm).
      
   8. Lower the vehicle. Do NOT roll the vehicle until the axle nut has been properly torqued or damage to the front wheel bearings will result.
      
   9. With the vehicle's brakes applied, torque the axle nut to 180 ft. lbs. (244 Nm). Install the spring washer, nut lock and a new cotter pin. Wrap the cotter pin prongs tightly around the axle nut lock.
      
   10. Reconnect the negative battery cable. Check the wheel alignment.
       

The hub/bearing assembly is attached to the steering knuckle with four bolts



Removing a hub/bearing assembly




If the hub/bearing is "frozen" to the steering knuckle, separate the ball joint and lightly tap on the hub/bearing from behind




The hub/bearing assembly should free itself from the steering knuckle

About $60 a hub.

Replacing the front wheel bearing/hubs can be a big job for the inexperianced. Briefly...
Remove tire/wheel
Remove brake caliper assembly, do not remove brake line.
Remove caliper bracket.
Remove brake rotor.
Unplug ABS sensor.
Remove the large axle nut.
Press axle out of bearing (may need special tool)
Remove the 3 bearing bolts and remove bearing.

I own the 2002 Buick Rendezvous CX and I've encountered the same problems listed here. The ABS / Traction Control Lamp stays on and was throwing a code for the left wheel speed sensor as well as an anti-lock brake code (both in the wheel bearing hub assembly). I replaced the left and right front wheel hub assembly yet this did not eliminate the abs codes. 
Ultimately, I traced this problem to a break in the wire that leads to the left hub assembly. Although the sensor was properly connected, the wire (which is encased in a plastic housing) was broken. This is the wiring which leads from the abs wiring harness under the hood down to the left wheel abs sensor. 
I would suggest that you simply remove the left wheel and inspect the wire that leads to the abs sensor (there is only one wire on each wheel). Mine literally fell apart when I removed the plastic housing around the wire. I spliced the wire together and put it back in the plastic housing. After this, my abs codes disappeared and my anti-lock brakes began working again!
This is a simple fix that many people spend $1000 + on by replacing the hub assembly which does not fix the problem.