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STEERING SYSTEM
IT2011 4-3
T TROUBLESHOOTING
1 . Supplemental Restraint System "Airbag"
Airbag system wiring harness is routed near the steering system .
a . All Airbag system wiring harness and connectors are colored yellow . Do not use electrical test equipment on
these circuit.
b. Be careful not to damage Airbag system wiring harness when servicing the steering system.
2. Power Steering
1 . STEERING CONDITION
Heavy steering
Heavy steering
Steering wheel
Vehicle leads
Poor return of
effort in all
effort at stand
surges when
to one side or
steering wheel
range
still
turning
the other
to center
Pulley belt
NOT O .K.
Adjust or replace .
Fluid line
NOT
Perform or re-
1 . Unequal length of
1 . Folded hose
O'K'
place .
pulley belts
2 . Flattened pipe
2 . Adhesion of oil and
grease
OK
NOT
Fix or replace
3 . Loose or damage of
Tire and rim
pulley belt
1 . Flat tire
O .K.
4 . Poor uniformity of
2 . Mix use of different
tires
pulley belt cross
section
3 . Mix use of different
5 . Pulley belt touches
rims
to pulley bottom
4 . Abnormal wear of
6 . Poor revolution of
tire
5 . Unbalance of
pulleys except oil
pump pulley
remained grooves
7. Poor revolution of oil
6. Unbalance of tire
pressure
pump pulley
O . K .
O. K .
NOT O.K .
Replace or reinflate .
Front alignment
NOT
Adjust or
Tire and rim
1 . Improper or
unbal-
O.K.
retighten.
1 . Improper tires out
ance caster
of specification
2. Improper or
unbal-
2. Improper rims out
ance toe-in
of specification
3. Loose connection of
3. Tires not properly
suspension
inflated
O . K.
O .K.
Fluid
NOT O .K .
Refill, bleed air, replace
Others
~ K
Replace, Ad-
1 . Low fluid level
or instruct customer
1 . Damaged joint ASSY
just or instruct
2 . Aeration
2 . Unbalanced height
customer .
3 . Dust mix
3 . One-sided weight
4 . Deterioration of fluid
5 . Poor warming up of
O .K.
fluid *2
Measure steering effort .
Idling speed
NOT O .K.
Adjust or instruct cus-
1 . Lower idling speed
tomer .
2. Excessive drop of
idling speed at start
or at turning steering
wheel *3
*1 If tires and/or rims are wider, the load to power steering system is the more. Accordingly, in a condi-
i,K.
tion, for example before fluid warms up, relief valve may work before maximum turning angle. In this
case, steering effort may be heavy . When measured hydraulic pressure is normal, there is no abnormal
Measure hydraulic pres-
thing .
sure .
"2 In cold weather, steering effort may be heavy due to increased flow resistance of cold fluid. After
warming up engine, turn steering wheel from stop to stop several times to warm up fluid. Then if steer-
F
ing effort reduces normally, there is no abnormal thing.
Measure steering effort .
"3 In cold weather or with insufficient warm up of engine, steering effort may be heavy due to exces-
sive drop of idling when turning steering wheel. In this case, it is recommended to start the vehicle with
increasing engine speed than usual . Then if steering effort reduces normally, there is no abnormal thing.
67
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Table of Contents
Troubleshooting
