Steering Column: Diagnosis — Lexus LS III рестайлинг (2003-2006)

Steering Column: Diagnosis Lexus LS III рестайлинг

PROBLEM SYMPTOMS TABLE

HINT

Use the figure (Scheme 1) below to help determine the cause of the problem. The numbers indicate the priority of the likely causes of the problem. Check each part in order. If necessary, repair or replace these parts.

Scheme 1

Scheme 1: PROBLEM SYMPTOMS TABLE

HINT

When the problem occurs in the power tilt and telescopic steering system, refer to the DI section (see «HOW TO PROCEED WITH TROUBLESHOOTING» ).

Scheme 2

Scheme 2: ON-VEHICLE INSPECTION

CHECK STEERING WHEEL FREEPLAY Stop the vehicle and align the tires straight ahead. Turn the steering wheel gently right and left, and check the steering wheel freeplay. Maximum freeplay: 30 mm (1.18 in.) If the free play exceeds the maximum, replace the steering intermediate shaft sub-assy or steering gear.

Scheme 3

Scheme 3: REPAIR

Scheme 4

Scheme 5

Scheme 6

Scheme 7

STEERING OFF CENTER REPAIR PROCEDURE Inspect steering wheel off center. Apply masking tape on the top center of the steering wheel and steering column upper cover. Drive the vehicle in a straight line for 100 meters at a constant speed of 35 mph (56 km/h), and hold the steering wheel to maintain the course. Draw a line on the masking tape as shown in the illustration. Turn the steering wheel to the center position. HINT: Lock at to the upper surface of the steering wheel, steering spoke and SRS airbag line for the center position. Draw a new line on the masking tape on the steering wheel as shown in the illustration. Measure the distance between the 2 lines on the masking tape on the steering wheel. Convert the measured distance to steering angle. Measured distance 1 mm (0.04 in.) = Steering angle of approximately 1 degree. HINT: Make a note of the steering angle. Adjust steering angle. Draw a line on the RH and LH tie rod ends and rack respectively ends where it can be easily seen. Using a paper gauge, measure the distance from the RH and LH tie rod ends to the rack end screws. HINT: Measure both the RH and LH side Make a note of the measured values. Remove the RH and LH boot clips from the rack boots. Loosen the RH and LH lock nuts. Turn the RH and LH rack ends by the same amount but in different directions according to the steering angle. One 360 degree turn of rack end (1.5 mm (0.059 in.) horizontal movement) equals to 12 degree of steering angle. Tighten the RH and LH lock nuts by the specified torque. Torque: 74 N.m (750 kgf.cm, 54 ft.lbf) NOTE: Make sure that the difference in length between the RH and LH tie rod ends and rack end screws are within 1.5 mm (0.059 in.) Install the RH and LH boot clips.