Lexus RX300 (MCU15). Service manual - part 522

SR069–06

F12882

SST

Fulcrum Length

Fulcrum
Length

SST

LHD:

RHD:

SR–50

–

STEERING

POWER STEERING GEAR

LEXUS RX300   (RM785E)

INSTALLATION

1.

INSTALL PS GEAR ASSEMBLY

(a)

Install the PS gear assembly from the LH of the vehicle.

NOTICE:
Do not damage the turn pressure tubes.
(b)

Install the 2 PS gear assembly set bolts and nuts.
Torque: 181 N·m (1,850 kgf·cm, 134 ft·lbf)

2.

CONNECT PRESSURE FEED AND RETURN TUBES

Using SST, connect the pressure feed and return tubes.

SST

09023–38400

Torque: 23 N·m (230 kgf·cm, 17 ft·lbf)

HINT:

S

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

S

This torque value is effective in case that SST is parallel
to a torque wrench.

3.

CONNECT 2 CLAMP PLATES

Connect the 2 clamp plates with the bolt and nut.

Torque: 
Bolt: 7.8 N·m (80 kgf·cm, 69 in.·lbf)
Nut: 9.8 N·m (100 kgf·cm, 7 ft·lbf)

4.

CONNECT INTERMEDIATE SHAFT SUB–ASSEMBLY
(See page SR–18)

5.

CONNECT RH AND LH TIE ROD ENDS
(See page SA–14)

6.

PLACE FRONT WHEELS FACING STRAIGHT AHEAD

HINT:
Do it with the front of the vehicle jacked up.
7.

CENTER SPIRAL CABLE (See page SR–18)

8.

INSTALL STEERING WHEEL

(a)

Align the matchmarks on the steering wheel and steering
column main shaft.

(b)

Install the steering wheel and temporarily tighten the
steering wheel set nut.

(c)

Connect the connector.

9.

BLEED POWER STEERING SYSTEM
(See page SR–5)

10.

CHECK STEERING WHEEL CENTER POINT

11.

TORQUE STEERING WHEEL SET NUT
Torque: 35 N·m (360 kgf·cm, 26 ft·lbf)

12.

INSTALL STEERING WHEEL PAD (See page SR–18)

13.

CHECK FRONT WHEEL ALIGNMENT 
(See page SA–4)

SUPPLEMENTAL RESTRAINT SYSTEM

STEERING WHEEL PAD AND 

SPIRAL CABLE

RS–12

. . . . . . . . . . . . . . . . . . . . . . . . 

FRONT PASSENGER 

AIRBAG ASSEMBLY

RS–26

. . . . . . . . . . . . . . . . . . . 

SIDE AIRBAG ASSEMBLY

RS–38

. . . . . . . . . . . . . . . . 

AIRBAG SENSOR ASSEMBLY

RS–51

. . . . . . . . . . . . 

FRONT AIRBAG SENSOR

RS–56

. . . . . . . . . . . . . . . . 

SIDE AIRBAG SENSOR ASSEMBLY

RS–61

. . . . . . . 

WIRE HARNESS AND CONNECTOR

RS–66

. . . . . . 

RS0JO–08

–

SUPPLEMENTAL RESTRAINT SYSTEM

SRS AIRBAG

RS–1

LEXUS RX300   (RM785E)

SRS AIRBAG

PRECAUTION

CAUTION:

S

The LEXUS RX300 is equipped with SRS, which comprises a driver airbag, front passenger air-
bag and side airbag. Failure to carry out service operations in the correct sequence could cause
the SRS to unexpectedly deploy during servicing, possibly leading to a serious accident. Fur-
ther, if a mistake is made in servicing the SRS, it is possible that the SRS may fail to operate
when required. Before performing servicing (including removal or installation of parts, inspec-
tion or replacement), be sure to read the following items carefully, then follow the correct proce-
dures described in the repair manual.

S

Work must be started 90 seconds after the ignition switch is turned to the ”LOCK” position and
the negative (–) terminal cable is disconnected from the battery.
(The SRS is equipped with a back–up power source so that if work is started within 90 seconds
from disconnecting the negative (–) terminal cable of the battery, the SRS may be deployed.)

S

Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly,
airbag sensor assembly, front airbag sensor or side airbag sensor assembly directly to hot air
or flames.

NOTICE:

S

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.

S

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front
passenger airbag assembly, side airbag assembly, airbag sensor assembly, front airbag sen-
sor and side airbag sensor assembly should be inspected (See page RS–14, RS–28, 
RS–41, RS–53, RS–58 and RS–63).

S

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.

S

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

S

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side
airbag assembly, airbag sensor assembly, front airbag sensor or side airbag sensor assembly
in order to reuse it.

S

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, airbag sen-
sor assembly, front airbag sensor, or side airbag sensor assembly has been dropped, or if there
are cracks, dents or other defects in the case, bracket or connector, replace it with new one.

S

Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting the system’s
electrical circuits.

S

Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions on the notices.

S

After work on the SRS is completed, perform the SRS warning light check (See page DI–305).

S

When the negative (–) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record of the contents mem-
orized in the audio memory system. When work is finished, reset the audio systems as they
were before and adjust the clock. To avoid erasing the memory in each memory system, never
use a back– up power supply from outside the vehicle.

S

If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.