Subaru 2002 IMPREZA Service Manual page 2475

2. MEASUREMENT OF STEERING EFFORT
Step
1 CHECK STEERING EFFORT.
1)Stop the vehicle on a concrete road.
2)Start the engine.
3)Idle the engine.
4)Install the spring scale on the steering wheel.
5)Pull the spring scale at an right angle to
steering wheel, and measure both right and left
steering wheel effort.
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 oil pump and is not a problem.
2 CHECK STEERING EFFORT.
1)Stop the engine.
2)Pull the spring scale at an right angle to the
steering wheel, and measure both right and left
steering wheel effort.
3 CHECK STEERING WHEEL EFFORT.
1)Remove the universal joint.
2)Measure the steering wheel effort.
4 CHECK STEERING WHEEL EFFORT.
Measure the steering wheel effort.
5 CHECK UNIVERSAL JOINT.
Measure the folding torque of the joint (yoke of
steering column side). <Ref. to PS-28,
INSPECTION, Universal Joint.>
6 CHECK UNIVERSAL JOINT.
Measure the folding torque of the joint (yoke of
gearbox side). <Ref. to PS-28, INSPECTION,
Universal Joint.>
7 CHECK FRONT WHEEL.
8 CHECK TIE-ROD ENDS.
Remove the tie-rod ends.
9 CHECK BALL JOINT.
10 CHECK GEARBOX.
Measure the rotating of gearbox.
LHD: <Ref. to PS-50, TURNING RESIS-
TANCE OF GEARBOX, INSPECTION, Steer-
ing Gearbox [LHD MODEL].>
RHD: <Ref. to PS-70, TURNING RESIS-
TANCE OF GEARBOX, INSPECTION, Steer-
ing Gearbox [RHD MODEL].>
GENERAL DIAGNOSTIC TABLE
Is the steering effort 29.4 N
(3.0 kgf, 6.6 lb) or less?
Is the steering effort 314 N (35
kgf, 77 lb) or less?
Is the maximum force steering
wheel effort 2.26 N (0.23 kgf,
0.51 lb) or less?
Is the fluctuation width 1.08 N
(0.11 kgf, 0.24 lb) or less?
Is the folding torque 7.3 N
(0.74 kgf, 1.64 lb) or less?
Is the folding torque 7.3 N
(0.74 kgf, 1.64 lb) or less?
Are the front wheels for
unsteady revolution or rattling
and brake for dragging?
Are the tie-rod ends of suspen-
sion for unsteady revolution or
ratting?
Are the ball joints of suspen-
sion for unsteady revolution or
ratting?
Is the rotating resistance 12.7
N (1.3 kgf, 2.9 lb) or less in all
positions within 20 % differ-
ence between clockwise and
counterclockwise?
PS-113
POWER ASSISTED SYSTEM (POWER STEERING)
Check
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Inspect, readjust
and replace if nec-
essary.
Inspect and
replace if neces-
sary.
Inspect and
replace if neces-
sary.
Go to step 11.
Yes No
Adjust the back-
lash.
Perform adjust-
ment.
Check, adjust and
replace if neces-
sary.
Check, adjust and
replace if neces-
sary.
Replace with new
one.
Replace with new
one.
Go to step 8.
Go to step 9.
Go to step 10.
Readjust the back-
lash, and if ineffec-
tive, replace the
faulty parts.