Jeep Cherokee 1999 Electronic Service Manual page 1283

19 - 2 STEERING
DI AGN OSI S AN D T EST I N G
POWER STEERING SYSTEM DIAGNOSIS CHARTS
Th er e is som e n oise in a ll power st eer in g syst em s. On e of t h e m ost com m on is a h issin g sou n d eviden t a t a
st a n dst ill pa r kin g. Or wh en t h e st eer in g wh eel is a t t h e en d of it 's t r a vel. H iss is a h igh fr equ en cy n oise sim ila r
t o t h a t of a wa t er t a p bein g closed slowly. Th e n oise is pr esen t in a ll va lves t h a t h a ve a h igh velocit y flu id pa ssin g
t h r ou gh a n or ifice. Th er e is n o r ela t ion sh ip bet ween t h is n oise a n d st eer in g per for m a n ce.
CONDITION
OBJECTIONAL HISS OR
WHISTLE
RATTLE OR CLUNK
CHIRP OR SQUEAL
WHINE OR GROWL
SUCKING AIR SOUND
SCRUBBING OR
KNOCKING
ST EERI N G N OI SE
POSSIBLE CAUSES
1. Steering intermediate shaft to dash panel
seal.
2. Noisy valve in power steering gear.
1. Gear mounting bolts loose.
2. Loose or damaged suspension
components.
3. Loose or damaged steering linkage.
4. Internal gear noise.
5. Pressure hose in contact with other
components.
1. Loose belt.
1. Low fluid level.
2. Pressure hose in contact with other
components.
3. Internal pump noise.
1. Loose return line clamp.
2. O-ring missing or damaged on hose
fitting.
3. Low fluid level.
4. Air leak between pump and reservoir.
1. Wrong tire size.
2. Wrong gear.
CORRECTION
1. Check and repair seal at dash
panel.
2. Replace steering gear.
1. Tighten bolts to specification.
2. Inspect and repair suspension.
3. Inspect and repair steering
linkage.
4. Replace gear.
5. Reposition hose.
1. Adjust or replace.
1. Fill to proper level.
2. Reposition hose.
3. Replace pump.
1. Replace clamp.
2. Replace o-ring.
3. Fill to proper level.
4. Repair as necessary.
1. Verify tire size.
2. Verify gear.
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