Awd speed sensor replacement

Buick Rendezvous Service Traction system and Anti-Lock warning ...

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Jul 15, 2007 - 31 posts - ‎19 authors See Also: Buick Rendezvous FIX Trac Off ABS warning light DTC sensor hub wheel.... For the service traction,ABS,AWD lights it may be a wheel speed sensor (also .... I drive a 2004 Buick Rendezvous with about 120K miles.Missing: atl

assuming its the wheel speed sensor part of abs sensor need to remove wheel -brakes-caliper-brake bracket-rotor -and will see black wire going to hub -if you need to replace sensor will need to replace hub there incorporated into the hub

The poster did not specify AWD or FWD. 1st answer was for an AWD vehicle, 2nd answer was for the front hub.

For a FWD vehicle, remove the rear wheel, caliper and disc. Disconnect the ABS sensor if applicable and remove the hub assembly. Replace the hub assembly and reassemble in reverse order.

Most common repair to solve the AWD Disable light problem is replace flow valve on the rear differential and also replace 4 pints of VersaTrak at the same time. (I'm a retired GM engineer.)

if abs [also speed] sensor is damaged better off replacing hub most sensors are incorporated into the hub or are a ring style that is a press fit around the hub and still have to remove hub to replace--- larger vehicles and some cross overs u can remove just the sensor not in your case --if just wire damaged can order and replace but if abs needs to be replaced than prior to removing wheel loosen center axle nut dont remove yet jack up and support vehicle- remove wheel,brake caliper,brake bracket,rotor and center axle nut ,disconnect abs wire connection and remove the 3 bolts at rear of hub and remove hub from spindle clean area and reinstall hub careful of wire connection replace all components

Rear Suspension - Rear Wheel Bearing Fusion 2002.75 (06/2002-)

-Removal and Installation

Special Tool(s)

Installer, Differential Bearing
205-062

Installer, Input Shaft Seal
307-210 (17-041)


General Equipment
Soft faced hammerWooden block

Removal

CAUTION: The brake drum and hub assembly removal in this procedure is for installing a new wheel bearing, not for access to brake system components.

-All vehicles

Remove the dust cap.
Remove the wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).

-Vehicles with rear drum brakes
Release the parking brake.
Remove the brake drum and hub assembly.
Remove and discard the wheel hub retaining nut.


-Vehicles with rear disc brakes
Remove the brake disc.
For additional information, refer to in this section.

Remove the wheel hub.
Remove and discard the wheel hub retaining nut.


-All vehicles

Remove and discard the wheel speed sensor ring (brake disc shown).
Remove the circlip (brake disc shown).
Using the special tool, remove and discard the wheel bearing (brake disc shown).

-Installation

-All vehicles

CAUTION: Support the wheel hub assembly on the wheel mounting face and not on the wheel nut studs.

Using the special tool, install the new wheel bearing (brake disc shown).

Install the circlip (brake disc shown).

CAUTIONS:

Make sure the wheel speed sensor ring is not knocked, damaged and kept free from metal fragments.

Protect the face of the wheel speed sensor ring with a non-ferrous flat block to prevent damage.

Make sure the wheel hub or brake drum is adequately supported and do not allow it to rest on the wheel studs..

Make sure the wheel speed sensor ring is pressed on slowly and squarely until fully seated.

Do not exceed a maximum load of 10 kN.

Using the special tool, install a new wheel speed sensor ring (brake disc shown).

Vehicles with rear drum brakes

CAUTIONS:

Avoid impact on the wheel speed sensor ring.

Make sure the wheel speed sensor ring is clean.

Avoid any contact between the wheel speed sensor ring and a magnetic surface.

Rotate the wheel hub assembly 10 times counter-clockwise when tightening the wheel hub retaining nut to prevent damage to the wheel bearing.

NOTE: Install a new wheel hub retaining nut.

Install the brake drum and hub assembly.
Apply the parking brake.

-Vehicles with rear disc brakes


CAUTIONS:

Avoid impact on the wheel speed sensor ring.

Make sure the wheel speed sensor ring is clean.

Avoid any contact between the wheel speed sensor ring and a magnetic surface.

Rotate the wheel hub assembly 10 times counter-clockwise when tightening the wheel hub retaining nut to prevent damage to the wheel bearing.

NOTE: Install a new wheel hub retaining nut.

Install the wheel hub retaining nut.
Install the brake disc.
For additional information, refer to in this section.


-All vehicles
Install the wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).

NOTE: If the dust cap is damaged a new dust cap must be installed.

Using a soft faced hammer and a wooden block, install the dust cap.


There is no real torque settings for the rear wheels, except to say, do not over tighten or you will stretch the lugs and the will loosen over time.

Adjustment

1. Place parking brake lever in -full released- position.
2. Raise and support vehicle.
3. Remove plug in parking brake shoe support to access adjuster star-wheel.
4. Through the access hole, rotate the adjuster star wheel in the following direction to expand the shoes outward against the drum:
   1. Left brake - Rotate star-wheel toward rear of vehicle.
   2. Right brake - Rotate star-wheel toward front of vehicle.
5. Using an appropriate tool, turn adjuster star wheel until wheel will not rotate (dead lock).
6. Back off adjuster six detents (teeth).
7. Rotate wheel, checking for light drag. If drag is too heavy, continue to back off adjuster one detent at a time until light drag is present. Do not back off star-wheel more than 17 detents from wheel lock.
8. Install access plug.
9. Adjust opposite wheel parking brake shoes using same method.
10. Lower vehicle.
11. Apply and release parking brake lever once to ensure proper operation of parking brakes.

Removal & Installation NOTE The following procedure may be used to remove shoes on either side of the vehicle.

1. Lock out automatic adjuster in parking brake lever.
2. Raise and support vehicle.
3. Access and remove rear hub and bearing.
4. Remove parking brake cable bolt at knuckle.
5. Completely back off parking brake shoe adjustment.
6. Remove parking brake shoe adjuster spring.
7. Remove shoe adjuster.
8. Remove upper brake shoe hold-down clip and pin.
9. Remove lower brake shoe hold-down clip and pin.
10. Remove upper and lower shoes with return spring from shoe actuator.
11. Remove return spring from shoes.
    
    

    Fig. View of the actuator (1), support (2), adjuster spring (3), return spring (4), caliper adapter (5), shoes (6), hold-down clips and pins (7) and adjuster (8)
    

To install:

1. Install return spring between upper and lower shoes.
   NOTE Before installing shoes on actuator, make sure actuator hooked to rear cable is positioned with word -UP- facing outward.
2. Install upper and lower shoes with return spring on shoe actuator located on parking brake cable.
3. Install lower brake shoe hold-down pin through rear of support and lower shoe, then install hold-down clip.
4. Install upper brake shoe hold-down pin through rear of support and upper shoe, then install hold-down clip.
5. Install shoe adjuster. Place end of adjuster with star wheel upward.
6. Install parking brake shoe adjuster spring.
7. Install bolt securing parking brake cable to knuckle and tighten bolt to 21 ft. lbs. (28 Nm).
8. Using Brake Shoe Gauge, Special Tool C-3919, or equivalent, measure inside diameter of parking brake drum portion of rotor.
9. Place Gauge over parking brake shoes at widest point.
10. Using adjuster star wheel, adjust parking brake shoes until linings on both park brake shoes just touch jaws on gauge. This will give a good preliminary adjustment of parking brake shoes, before a final adjustment is made at end of this procedure.
11. Install hub and bearing with wheel speed sensor as well as all components necessary to access it.
12. Lower vehicle.
13. Unlock automatic adjuster in parking brake lever.
14. Perform final adjustment of parking brake shoes

15. 
    Adjustment This vehicle is equipped with permanently sealed rear wheel bearings. There is no periodic lubrication or maintenance recommended for these units.
    

    
    Removal & Installation

    1. Raise and support vehicle.
    2. Remove wheel mounting nuts, then tire and wheel assembly.
    3. If equipped with AWD:
       1. Remove cotter pin, nut lock and spring washer from half shaft.
       2. While a helper applies brakes to keep hub from turning, remove hub nut and washer.
    4. Remove brake caliper and rotor from hub and bearing assembly.
       
       

       Fig. Hub assembly
       

    5. Disconnect vehicle wiring harness connector at wheel speed sensor connector.
    6. Unclip wheel speed sensor connector from spare tire mounting support.
    7. Disconnect two sensor cable routing clips on rear suspension crossmember.
    8. Disconnect two sensor cable routing clips along toe link.
    9. Disconnect sensor cable from bracket on brake support.
       
       
    10. Completely loosen, but do not remove four bolts fastening hub and bearing in place. Once loosened from threads in hub and bearing, push bolts up against rear of hub and bearing to keep brake support plate in place when hub and bearing is removed.
        
        

        Fig. Rear hub and bearing mounting bolts
        

    11. Pull hub and bearing off knuckle and half shaft (if equipped with AWD), then thread wheel speed sensor cable through hole in brake support plate as it is removed with hub and bearing.
        
        
    To install:
    
    1. Position hub and bearing bolts though rear of knuckle and parking brake support just enough to hold support in place as hub and bearing is installed.
    2. Install hub and bearing by first feeding end of wheel speed sensor cable through hole in bottom of parking brake support. As this is being done, if equipped with AWD, slide hub and bearing onto half shaft. Place hub and bearing through brake support, onto knuckle, lining up mounting bolt holes with bolts and placing wheel speed sensor head at bottom.
    3. Install four bolts fastening hub and bearing in place. Tighten mounting bolts to 60 ft. lbs. (81 Nm).
    4. Place wheel speed sensor cable routing grommet into bracket on parking brake support.
    5. Route wheel speed sensor cable along toe link and rear suspension crossmember connecting routing clips where shown.
    1. Connect vehicle wiring harness to wheel speed sensor connector.
    2. Install brake rotor and caliper.
    3. If equipped with AWD:
       1. Install washer and hub nut on end of half shaft.
       2. While a helper applies brakes to keep hub from turning, tighten hub nut to 180 ft. lbs. (244 Nm).
       3. Install spring washer, nut lock and cotter pin on end of half shaft.
    4. Install tire and wheel assembly. Install and tighten wheel mounting nuts to 100 ft. lbs. (135 Nm).
    
    
    

    
    
    

On my 2006 Montana AWD I had this same problem. It also disabled the auto start. There are 4 sensors, one on each wheel hub so either you can hear what sounds like a bad bearing while driving and locate it that way or you can have it hooked up to a diagnostic computar which should also tell you which one is bad. On the 06' the sensor and wheel hub are sold as one piece. Since owning this vehicle I have had to replace three hub assembles which do actually fix the problem till the next one fails. I have found this to be a common problem.

Rear wheel hub(s) will cause the AWD light to come on and sometimes off. After awhile that light will just stay on until you get the rear wheel hub replaced. You can either have a dealer do it for approx $500.00 or you can get the part at AutoZone for $129.00 and do it yourself. This will turn off the AWD light and also quiet the rear noise you hear.

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.