Jeep Cherokee 1999, Electronic Service Manual

Page: 1283 / 1948

DI AGN OSI S AN D T EST I N G
POWER STEERING SYSTEM DIAGNOSIS CHARTS
ST EERI N G N OI SE
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 POSSIBLE CAUSES CORRECTION
OBJECTIONAL HISS OR
WHISTLE 1. Steering intermediate shaft to dash panel
seal. 1. Check and repair seal at dash
panel.
2. Noisy valve in power steering gear. 2. Replace steering gear.
RATTLE OR CLUNK 1. Gear mounting bolts loose. 1. Tighten bolts to specification.
2. Loose or damaged suspension
components. 2. Inspect and repair suspension.
3. Loose or damaged steering linkage. 3. Inspect and repair steering
linkage.
4. Internal gear noise. 4. Replace gear.
5. Pressure hose in contact with other
components. 5. Reposition hose.
CHIRP OR SQUEAL 1. Loose belt. 1. Adjust or replace.
WHINE OR GROWL 1. Low fluid level. 1. Fill to proper level.
2. Pressure hose in contact with other
components. 2. Reposition hose.
3. Internal pump noise. 3. Replace pump.
SUCKING AIR SOUND 1. Loose return line clamp. 1. Replace clamp.
2. O-ring missing or damaged on hose
fitting. 2. Replace o-ring.
3. Low fluid level. 3. Fill to proper level.
4. Air leak between pump and reservoir. 4. Repair as necessary.
SCRUBBING OR
KNOCKING 1. Wrong tire size. 1. Verify tire size.
2. Wrong gear. 2. Verify gear.
19 - 2 STEERING X J