Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 574

PS-17

Steering Column

POWER ASSISTED SYSTEM (POWER STEERING)

9) Pull out the steering shaft assembly from the

hole on toe board.
CAUTION:

• Always remove the universal joint before re-

moving the steering column installation bolt to

avoid damage to the universal joint.

• Be sure to remove the universal joint before

removing the parts, if the relative position be-

tween steering shaft and gearbox changes

when removing steering shaft assembly or

when lowering it and gearbox for servicing oth-

er parts.

• Do not loosen the tilt lever when the steering

column is not secured to the vehicle.

B: INSTALLATION

1) Install the grommet to the toe board.

2) Insert the end of the steering shaft into the toe

board grommet.

3) With the tilt lever secured, tighten the steering

shaft mounting bolts under instrument panel.
Tightening torque:

20 N·m (2.0 kgf-m, 14.8 ft-lb)

4) Connect all the connectors under the instrument

panel.

5) Connect the airbag system connector at the har-

ness spool.
NOTE:

Make sure to apply double lock.

6) Install the instrument panel lower cover with tilt

lever held in the lowered position.

7) Install the universal joint. <Ref. to PS-14, IN-

STALLATION, Universal Joint.>

8) Align the center position of the roll connector.

<Ref. to AB-27, ADJUSTMENT, Roll Connector.>

9) Install the steering wheel. <Ref. to PS-13, IN-

STALLATION, Steering Wheel.>
CAUTION:

Insert the roll connector guide pin into the

guide hole on lower end of steering wheel sur-

face to prevent damage.

C: DISASSEMBLY

Remove the three screws securing the upper steer-

ing column covers, and the two screws securing

the combination switch, and then remove related

parts.

D: ASSEMBLY

Insert the combination switch to the upper column

shaft, and install the upper column cover. Then

route the ignition key harness and combination

switch harness between the column cover mount-

ing bosses.
CAUTION:

Do not overtorque the screw.
Tightening torque:

1.2 N·m (0.12 kgf-m, 0.9 ft-lb)

E: INSPECTION

1. BASIC INSPECTION

Measure the overall length of steering column. If

not within specification, replace it.
Standard: Overall length L
Tilt and telescopic column (measure while min-

imized)

818.6

+1.5

–1.5

mm (32.23

+0.059

–0.059

in)

2. INSPECTION OF AIRBAG SYSTEM

Refer to “Airbag System” for airbag inspection pro-

cedure. <Ref. to AB-15, INSPECTION, Driver’s Air-

bag Module.>

PS-00041

PS-00491

L

PS-18

Steering Gearbox

POWER ASSISTED SYSTEM (POWER STEERING)

5. Steering Gearbox

A: REMOVAL

1) Set the vehicle on a lift.

2) Disconnect the ground cable from battery.

3) Loosen the front wheel nuts.

4) Lift up the vehicle, and then remove the front

wheels.

5) Remove the under cover. <Ref. to EI-28, RE-

MOVAL, Front Under Cover.>

6) Remove the front exhaust pipe assembly. <Ref.

to EX(STI)-6, REMOVAL, Front Exhaust Pipe.>
WARNING:

Be careful not to burn yourself because the ex-

haust pipe is hot.

7) Remove the cotter pin and castle nut securing

the tie-rod end.

8) Using a puller, remove the tie-rod.

9) Remove the front crossmember support plate

and front stabilizer. <Ref. to FS-17, REMOVAL,

Front Stabilizer.>

10) Remove the one pipe joint at the center of the

gearbox, and connect the vinyl hose to the pipe and

the joint. Discharge the fluid by turning the steering

wheel fully clockwise and counterclockwise. Dis-

charge the fluid similarly from other pipes.

11) Remove the universal joint. <Ref. to PS-14,

REMOVAL, Universal Joint.>

(A) Cotter pin
(B) Castle nut

(C) Tie-rod end

DS-00042

(C)

(B)

(A)

DS-00043

(1) Front crossmember support plate

(1) Pipe A
(2) Pipe B

PS-00445

(1)

(2)

PS-00553

(1)

PS-19

Steering Gearbox

POWER ASSISTED SYSTEM (POWER STEERING)

12) Disconnect the feed pipe from the pressure

hose first, then disconnect the return pipe from the

return hose.

13) Remove the clamp bolts securing the gearbox

to the crossmember, and remove the clamp.

14) Remove the bolts which secure the gearbox

bracket, and remove the stiffener and gearbox.

B: INSTALLATION

1) Insert the gearbox into crossmember, being

careful not to damage gearbox boot.

2) Install the gearbox and stiffener. Temporarily

tighten the bolts.

3) Insert bolts through the clamp to temporarily

tighten the gearbox to the crossmember bracket.

(1) Feed pipe
(2) Return pipe
(3) Pressure hose
(4) Return hose

(1) Clamp

PS-00538

(4)

(3)

(2)

(1)

PS-00554

(1)

(1) Stiffener

(1) Stiffener

(1) Clamp

(1)

PS-00555

(1)

PS-00555

PS-00554

(1)

PS-20

Steering Gearbox

POWER ASSISTED SYSTEM (POWER STEERING)

4) Tighten the bolts temporarily holding the gear-

box clamp and bracket together to the specified

torque.
Tightening torque:

60 N·m (6.1 kgf-m, 44.3 ft-lb)

5) Connect the return pipe to the return hose and

then connect the feed pipe to the pressure hose.
Tightening torque:

15 N·m (1.5 kgf-m, 11.1 ft-lb)

6) Install the universal joint. <Ref. to PS-14, IN-

STALLATION, Universal Joint.>

7) Connect the tie-rod end and knuckle arm, and

tighten with castle nut.
CAUTION:

When connecting, do not hit the cap at the bot-

tom of tie-rod end with hammer.
Castle nut tightening torque:

27 N·m (2.8 kgf-m, 19.9 ft-lb)

8) After tightening the castle nut to the specified

tightening torque, tighten it further within 60° until

the cotter pin hole is aligned with slot in the nut. Fit

the cotter pin into the nut, and then bend the pin to

lock.

9) Install the front stabilizer. <Ref. to FS-17, IN-

STALLATION, Front Stabilizer.>

10) Install the front crossmember support plate.

11) Install the front exhaust pipe assembly. <Ref.

to EX(STI)-6, INSTALLATION, Front Exhaust

Pipe.>

12) Install the under cover. <Ref. to EI-28, INSTAL-

LATION, Front Under Cover.>

13) Install the front wheels.

14) Tighten the wheel nuts to the specified torque.
Tightening torque:

100 N·m (10.2 kgf-m, 73.8 ft-lb)

15) Lower the vehicle.

16) Remove the steering wheel. <Ref. to PS-13,

REMOVAL, Steering Wheel.>

17) Align the center position of the roll connector.

<Ref. to AB-27, ADJUSTMENT, Roll Connector.>

18) Install the steering wheel. <Ref. to PS-13, IN-

STALLATION, Steering Wheel.>

19) Connect the battery ground terminal.

20) Pour fluid into the oil tank, and bleed air. <Ref.

to PS-51, Power Steering Fluid.>

21) Check for fluid leaks.

22) Check the fluid level in oil tank.

(1) Feed pipe
(2) Return pipe
(3) Pressure hose
(4) Return hose

PS-00538

(4)

(3)

(2)

(1)

(A) Cotter pin
(B) Castle nut

(C) Tie-rod end

DS-00042

(C)

(B)

(A)