Subaru 2006 Legacy, Manual

Page: 4059 / 4302

PS-5 8
General Diagnostic Table
POWER ASSISTED SYSTEM (POWER STEERING)
2. MEASUREMENT OF STEERING EFFORT
Step Check Yes No
1 CHECK STEERING EFFORT.
1) Stop the vehicle on paved road.
2) Start the engine.
3) Run the engine at idle.
4) Install a spring scale on the steering wheel.
5) Pull the spring scale at a right angle to the
steering wheel, and measure both right and left
steering wheel efforts.
NOTE:
When turning the steering more quickly than
necessary from a direction to the other direction
at an engine speed over 2,000 rpm, steering ef-
fort may be heavy. This is caused by flow char-
acteristic of the fluid in the oil pump and is not a
defect.
Is the steering effort less than
29.4 N (3.0 kgf, 6.6 lb)? Go to step
2
. Adjust the back-
lash.
2 CHECK STEERING EFFORT.
1) Stop the engine.
2) Pull the spring scale at a right angle to the
steering wheel, and measure both right and left
steering wheel efforts.
Is the steering effort less than
294.2 N (30 kgf, 66.2 lb)? Go to step 3 . Perform the
adjustment.
3 CHECK STEERING WHEEL EFFORT.
1) Remove the universal joint.
2) Measure the steering wheel effort.
Is steering effort less than 2.26
N (0.23 kgf, 0.51 lb)? Go to step 4 . Check, adjust and
replace if neces-
sary.
4 CHECK STEERING WHEEL EFFORT.
Measure the steering wheel effort.
Is the difference of steering
effort between right and left
less than 20%? Go to step 5 . Check, adjust and
replace if neces-
sary.
5 CHECK UNIVERSAL JOINT.
Measure the swing torque of the joint (yoke of
steering column side). <Ref. to PS-15,
INSPECTION, Universal Joint.>
Is the swing torque of the uni-
versal joint less than 7.3 N
(0.74 kgf, 1.64 lb)? Go to step 6 . Replace with a
new part.
6 CHECK UNIVERSAL JOINT.
Measure the swing torque of the joint (yoke of
gearbox side). <Ref. to PS-15, INSPECTION,
Universal Joint.>
Is the swing torque of the uni-
versal joint less than 3.8 N
(0.39 kgf, 0.86 lb)? Go to step
7
. Replace with a
new part.
7 CHECK FRONT WHEEL.
Check the front wheels.
Does the front wheels have
unsteady revolution or rattling,
or does the brake drag? Inspect, readjust
and replace if nec-
essary. Go to step 8 .
8 CHECK TIE-ROD ENDS.
Remove the tie-rod ends.
If the tie-rod ends of suspen-
sion have unsteady revolution
or rattling? Inspect and
replace if neces-
sary. Go to step 9 .
9 BALL JOINT CHECK.
Remove the ball joint.
If the ball joints of suspension
have unsteady revolution or
rattling? Inspect and
replace if neces-
sary. Go to step 10 .
10 CHECK GEARBOX.
Measure the rotating of gearbox.
<Ref. to PS-36, TURNING RESISTANCE OF
GEARBOX, INSPECTION, Steering Gear-
box.>
Is the rotating resistance of
steering gearbox less than
11.3 N (1.15 kgf, 2.54 lb)? Is
the difference between right
and left sides less than 24%? Steering effort is
normal. Readjust the back-
lash, and if ineffec-
tive, replace the
faulty parts.
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