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Abs Sensor Replacement (TA04 7001)

Publication date: 2004-06-04
Reference number: TA04 7001
Supersedes refnos: 70/02/04/NAS

ABS SENSOR REPLACEMENT

ABS SENSOR REPLACEMENT

TECHNICAL SERVICE BULLETIN

Reference Number(s): 70/02/04/NAS, Date of Issue:  June 04, 2004
LAND ROVER: Discovery Series II (LT)
REFERENCE: TA04 7001
ISSUE: 1
SECTION: ABS
AFFECTED VEHICLES: Discovery Series II (LT) all

SITUATION:

ABS SENSOR AVAILABLE AS PART FOR REPLACEMENT 

Investigating the root cause of ABS sensor faults indicates that the ABS sensor can now be reintroduced as a service part.

RESOLUTION:

REPLACE ABS SENSOR WHEN INDICATED 

NOTE: This bulletin supersedes and replaces Technical Alert TA04 7001

The ABS sensor can be used instead of replacing the complete hub assembly when a fault with the sensor has been confirmed. If an ABS sensor is to be replaced, follow the procedures detailed in this bulletin.

The Workshop Manual will be updated to include these procedures at the earliest available opportunity.

NOTE: Overlay harnesses have been released for any concerns with the connectors to the ABS sensor, or for any issues with the harness between the ABS sensor and connector C0505 (front) and C0392 (rear). Refer to Technical bulletins 86/04/04/NAS for further information.

PARTS INFORMATION:

PARTS INFORMATION CHART

P/N Description Qty.
TAR100060  Front ABS Sensor  Qty 2 (Replace as indicated) 
TAR100070  Rear ABS Sensor  Qty 2 (Replace as indicated) 

DDW WARRANTY CLAIMS:

DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.

DDW WARRANTY CLAIMS CHART

Description SRO Time (HOURS) Condition Code Causal Part
Install front ABS sensor 70.65.30  1.0  30 external damage
42 all other faults		 TAR000060
Install rear ABS sensor 70.65.31  1.0  TAR000070

Normal warranty policy and procedures apply. 

Material allowance is included in labor operation. 

REPAIR PROCEDURE

ABS SENSOR REPLACEMENT PROCEDURE - FRONT

  1. Release the ABS sensor harness grommet from the inner fender valance and disconnect the multi-plug. (Fig 1)
    WARNING: Always support the vehicle on safety stands.
    2. Fig 1: Disconnecting Multi-plug
    G03379380
  2. Raise front of vehicle and support with stands.
  3. Remove the wheel and tire assembly.
  4. Pull the ABS sensor harness through the aperture into the wheel arch. (2 in Fig 2)
  5. Release the ABS sensor harness from the brackets on the inner wing valance, suspension turret and the front hub. (3 in Fig 2)
    6. Fig 2: Releasing ABS Sensor Harness From Brackets
    G03379381
  6. Refer to RAVE/GTR section 70.12.10 and remove the front brake disc.
    CAUTION: The ABS sensor and the surrounding area must be clean to prevent contamination from entering the hub assembly.
  7. Perform the following: (5 in Fig 3)
    • Remove the Allen screw from the sensor
    • Release the ABS sensor from the front hub.
    • If the original O-ring remains in the sensor bore, remove it and discard.
    8. Fig 3: Removing ABS Sensor & O-Ring
    G03379382
  8. Loosen four bolts securing the front hub to the swivel hub. (6 in Fig 4)
  9. Release the front hub from the swivel hub sufficiently to allow the ABS sensor harness to be removed. (7 in Fig 4)
    10. Fig 4: Releasing Front Hub From Swivel Hub
    G03379383
  10. Clean the ABS sensor and mating surface, ensure any metallic particles are removed.
  11. Apply grease supplied in the kit to the ABS sensor.
  12. Lubricate new 'O' ring on the new ABS sensor.
  13. Position the ABS sensor between the hub and the swivel hub.
  14. Tighten Allen screw to 18 N.m (13 lbf.ft)  .
  15. Position the hub and the tighten bolts to 100 N.m (74 lbf.ft)  .
  16. Secure the ABS sensor harness to the brackets and secure the grommet to the inner fender valance.
  17. Connect the multi-plug to ABS sensor harness.
  18. Install the front brake disc.
  19. Lower the front of vehicle.

ABS SENSOR REPLACEMENT PROCEDURE - REAR

  1. Raise rear of vehicle and support with stands.
  2. Refer to RAVE/GTR section 70.12.33 and remove the rear brake disc.
  3. Disconnect the ABS sensor multi-plug. (2 in Fig 5)
  4. Release the ABS sensor harness from the brake hose and the hose bracket. (3 in Fig 5)
    CAUTION: ABS sensor and the surrounding area must be clean to prevent contamination entering the hub assembly.
    5. Fig 5: Releasing ABS Sensor Harness From Brake Hose & Hose Bracket
    G03379384
  5. Remove the Allen screw, release the ABS sensor from the hub and discard the 'O' ring. (4 in Fig 6)
  6. Remove the ABS sensor from the hub. (5 in Fig 6)
    7. Fig 6: Removing ABS Sensor From Hub
    G03379385
  7. If the original O-ring remains in the sensor bore, remove it and discard.
  8. Clean the ABS sensor and mating surface to ensure any metallic particles are removed.
  9. Apply grease supplied in the kit to the new ABS sensor.
  10. Lubricate new 'O' ring on the new ABS sensor.
  11. Position the ABS sensor to the hub and tighten the Allen screw to 18 N.m (13 lbf.ft)  .
  12. Connect the ABS sensor multi-plug.
  13. Secure the ABS sensor harness to the brake hose and the ABS sensor harness bracket.
  14. Install the rear brake disc.
  15. Lower the vehicle.
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