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Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 316 (Introduction) >> Precautions >> When Servicing Full-Time 4WD Vehicles
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When Servicing Full-Time 4WD Vehicles

WARNING: This page is about a different car, the 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION:
    • Tester with a function of load setting cannot be used.
    • Inspection should be done in the front wheels.
    • Do not start, accelerate nor decelerate the vehicle suddenly.
    • Maximum vehicle speed must be below 37 MPH. (When using free roller, it must be below 50 MPH.)
    • Driving time should be within 1 minute.
  1. Measuring points for speedometer testing:
    1. Place the front wheels onto rollers.
    2. Set the rear wheels free by free rollers or rigid racks.
    3. Fasten the vehicle with the lock chain.
    4. Start the engine, and then measure the vehicle speed by increasing the speed gradually in the "D" range.
    5. After the measurement completion, decrease the vehicle speed by brake gradually, and then stop the vehicle.
    2. CAUTION:
    • Tester with a function of load measurement cannot be used.
    • High speed type brake cannot be used.
    NOTE: In case that the dragging force is over 10 percent of the load put on the axles, inspection of the wheels rotating condition should be done with both of the left and right axles jacked up. If no abnormality is found in the rotating condition, adhesive torque of the viscous coupling causes the excessive dragging force and therefore it means no problem exists in the vehicle.
  2. Measuring Points for brake tester:
    1. Place the wheels to be measured (front or rear) onto the rollers.
    2. Shift the shift lever into neutral.
    3. Perform the measurement by driving the tester onto rollers.
    3. CAUTION:
    • Start the engine, and then increase the vehicle speed gradually on the "D" range.
    • Do not accelerate nor decelerate suddenly.
    • Deceleration should be done by brake gradually.
    • Take special care that the vehicle does not move.
    • Measurement should be done quickly.
  3. Measuring points for on-vehicle balancer:
    1. Jack up all 4 wheels with 2 post lift.
    2. Fasten the vehicle by setting 2 jack stands in the bottom of suspension arms tip of the front or rear wheel to be measured.
    3. Support the vehicle with rigid racks so that vehicle will not lean in the vehicles front or rear direction.
    4. Release the parking brake.
    5. Check that no dragging force exists by turning each wheel by hand.
    6. Set the wheel balancers.
    7. Measurement should be done by using both of engine drive and wheel balancer roller drive.
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