Lexus SC300 / Lexus SC400. Service manual - part 753

16.  INSTALL RACK BOOTS, CLAMPS AND CLIPS
(a)  Ensure that the tube hole is not clogged with grease.

HINT: If the tube hole is clogged, the pressure inside the boot
will change after it is assembled and the steering wheel
turned.

(b)  Install the boot.

NOTICE: Be careful not to damage or twist the boot.

(c)  Install the clamp and clip to the boot.

17.  INSTALL TIE ROD ENDS
(a)  Screw the lock nut and tie rod end onto the rack end until the

matchmarks are aligned.

(b)  After adjusting toe–in, torque the lock nut.

Torque: 56 N

⋅

m (570 kgf

⋅

cm, 41 ft

⋅

lbf)

18.  INSTALL RIGHT AND LEFT TURN PRESSURE TUBES
(a)  Install a new union seat.
(b)  Using SST, tighten nut.

SST 09633–00020

Torque: 24 N

⋅

m (240 kgf

⋅

cm, 17 ft

⋅

lbf)

HINT: Use a torque wrench with a fulcrum length of 300 mm
(11.81 in.).

(c)  Install the union bolt over the new gaskets and torque it.

Torque: 34 N

⋅

m (350 kgf

⋅

cm, 25 ft

⋅

lbf)

SR–162

–

STEERING

POWER STEERING

ELECTRONIC CONTROL SYSTEM
PRECAUTION

SR0GR–01

Do not open the cover or the case of the ECU and various computers unless absolutely necessary.
(If the IC terminals are touched, the IC may be destroyed by static electricity.)

ELECTRONIC CIRCUIT

SR0GS–04

–

STEERING

POWER STEERING

SR–163

TROUBLESHOOTING FLOW–CHART

SR0GT–04

Trouble

Hard steering at idle or low–speed driving.

Steering too sensitive during high–speed driving.

Preliminary Check

Check tire pressure.

Check lubrication of suspension and steering linkage.

Check front wheel alignment.

Check steering system joint and suspension arm ball joint.

Check for bent steering column.

Check that all connectors are secure.

Check PS pump fluid pressure. (See page SR–115)

SR–164

–

STEERING

POWER STEERING

BE–136

).

–

STEERING

POWER STEERING

SR–165