PS-52
General Diagnostic Table
POWER ASSISTED SYSTEM (POWER STEERING)
1. NOISE AND VIBRATION
CAUTION:
Do not keep the relief valve operated for five seconds or more at any time or inner parts of the oil
pump may be damaged due to rapid increase of fluid temperature.
NOTE:
• A screeching noise may be heard immediately after the engine start in extremely cold conditions. In this
case, if the noise goes off during warm-up there is no abnormal function in the system. This is due to the fluid
characteristics in extremely cold condition.
• The oil pump normally makes a small whining noise due to its mechanism. Even if a noise is heard when
steering wheel is turned at stand still, there is no abnormal function in the system provided that the noise
eliminates when the vehicle is driving.
• When turning the steering wheel with the brake applied when the vehicle is parked, a screeching noise
may be generated by the brake disc and pads. This is not a fault in the steering system.
• There may be a small vibration around the steering devices when turning the steering wheel at standstill,
even though the component parts are operating properly.
Hydraulic systems are likely to generate this kind of vibration as well as working noise and fluid noise be-
cause of combined conditions, i.e., road surface and tire surface, engine speed and turning speed of steering
wheel, fluid temperature and braking condition.
These conditions do not indicate a problem in the system.
Confirm vibration for an AT model, by applying the parking brake on a concrete surface, shifting into the “D”
range, and turning the steering wheel repeatedly from slow to rapid, step by step.
Trouble
Possible cause
Corrective action
Hiss noise (continuous)
While engine is running.
Relief valve emits operating sound when steering wheel is
completely turned in either direction. (Do not keep this con-
dition for 5 seconds or more.)
Normal operation
Relief valve emits operating sound when steering wheel is
not turned. This means that the relief valve is defective.
Replace the oil pump.
Rattling noise (intermittent)
While engine is running.
Interference with adjacent parts
Check the clearance.
Correct if necessary.
<Ref. to PS-56, INSPECTION OF
CLEARANCE, INSPECTION,
General Diagnostic Table.>
Loosened installation of oil pump, oil tank, pump bracket,
gearbox or crossmember
Retighten.
Loose oil pump pulley or other pulley(s)
Retighten.
Looseness of linkage, play of steering, improper tightening
(looseness) of suspension joint or steering column
Retighten or replace.
Sound generates from the inside of gearbox or oil pump.
Replace faulty parts in the gear-
box or oil pump.
Knocking
When turning steering wheel in
both directions with small angle
repeatedly at engine ON or
OFF.
Excessive backlash
Loosened lock nut for adjusting backlash
Adjust and retighten.
Insufficient tightening or play in the tie-rod or tie-rod end
Retighten or replace.
Grinding noise (continuous)
While engine is running.
Air in vane pump
Inspect and retighten the fluid line
connection.
Refill the fluid and vent air.
Vane pump seizing
Replace the oil pump.
Oil pump pulley bearing seized
Replace the oil pump.
Folded hose, flattened pipe
Replace.
Squeal, squeak (intermittent or
continuous)
While engine is running.
Improper adjustment of pulley belt
Damaged or over tensioned pulley belt
Unequal length of pulley belts
Adjust or replace.
(Replace two belts as a set.)
Runout or dirty V-groove surface of oil pump pulley
Clean or replace.
Содержание 2009 IMPREZA
Страница 18: ...PC 4 Precaution PRECAUTION...
Страница 21: ...NT 4 Note NOTE Lift Rigid rack A Attachment NT 00241 A A Attachment NT 00242 A...
Страница 23: ...NT 6 Note NOTE A Front B Rear 1 Front crossmember 2 Rear differential 1 2 A B NT 00210...
Страница 25: ...NT 8 Note NOTE TIE DOWN HOOK EYE BOLT A Front tie down hook B Rear tie down hook C Eye bolt NT 00213 A B C...
Страница 66: ...PI 22 Pre delivery Inspection PRE DELIVERY INSPECTION...
Страница 112: ...PM 48 A C Filter PERIODIC MAINTENANCE SERVICES...
Страница 219: ...IN H4SO 10 Resonator Chamber INTAKE INDUCTION...
Страница 324: ...ME H4SO 106 Engine Noise MECHANICAL...
Страница 388: ...SP H4SO 6 Accelerator Pedal SPEED CONTROL SYSTEMS...
Страница 395: ...IG H4SO 8 Spark Plug Cord IGNITION...
Страница 418: ...SC H4SO 24 Battery STARTING CHARGING SYSTEMS...
Страница 429: ...EN H4SO diag 12 Electrical Component Location ENGINE DIAGNOSTICS EN 05725 2 1 EN 06168 3 EN 03132 4...
Страница 725: ...EN H4SO diag 308 General Diagnostic Table ENGINE DIAGNOSTICS...
Страница 926: ...GD H4SO 202 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Страница 1181: ...EX H4DOTC 16 Muffler EXHAUST...
Страница 1212: ...CO H4DOTC 32 Engine Cooling System Trouble in General COOLING...
Страница 1221: ...IG H4DOTC 8 Ignition Coil IGNITION...
Страница 1818: ...GD H4DOTC 230 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Страница 1824: ...CS 7 AT Shift Lock Control System CONTROL SYSTEMS CS 00874 1 2 CS 00945 CS 00876 3 CS 00359 7 4 CS 00877 5 6...
Страница 2154: ...5MT 82 General Diagnostic Table MANUAL TRANSMISSION AND DIFFERENTIAL...
Страница 2227: ...RS 20 General Diagnostic Table REAR SUSPENSION...
Страница 2364: ...DS 36 General Diagnostic Table DRIVE SHAFT SYSTEM...
Страница 2577: ...BR 10 General Description BRAKE 7 BRAKE BOOSTER 1 Brake booster Tightening torque N m kgf m ft lb T 18 1 8 13 3 BR 00465 1 T...
Страница 2615: ...BR 48 General Diagnostic Table BRAKE...
Страница 2624: ...PB 10 General Diagnostic Table PARKING BRAKE...
Страница 2681: ...PS 58 General Diagnostic Table POWER ASSISTED SYSTEM POWER STEERING...
Страница 2730: ...AC 50 General Diagnostic Table HVAC SYSTEM HEATER VENTILATOR AND A C...
Страница 2940: ...OD diag 28 Diagnostic Procedure with Diagnostic Trouble Code DTC OCCUPANT DETECTION SYSTEM DIAGNOSTICS...
Страница 2961: ...SB 22 Rear Seat Belt SEAT BELT SYSTEM...
Страница 3035: ...COM 6 Horn Switch COMMUNICATION SYSTEM...
Страница 3070: ...GW 36 Wiper Deicer System GLASS WINDOWS MIRRORS...
Страница 3092: ...IDI 22 Clock INSTRUMENTATION DRIVER INFO...
Страница 3158: ...SL 54 Immobilizer Antenna SECURITY AND LOCKS...
Страница 3167: ...SR 10 Sunshade SUNROOF T TOP CONVERTIBLE TOP SUNROOF...
Страница 3240: ...EI 74 Ornament EXTERIOR INTERIOR TRIM...
Страница 3282: ...CC 8 Clutch Switch CRUISE CONTROL SYSTEM 6 Clutch Switch A NOTE For clutch switch refer to CL Ref to CL 27 Clutch Switch...
Страница 3286: ...CC 12 Neutral Position Switch CRUISE CONTROL SYSTEM...
Страница 3311: ...CC diag 26 Diagnostic Procedure with Cancel Code CRUISE CONTROL SYSTEM DIAGNOSTICS...
Страница 3342: ...LAN diag 9 Electrical Component Location LAN SYSTEM DIAGNOSTICS 1 LAN00303 LAN00425 2 LAN00299 7 8 LAN00297 LAN00008 11...
Страница 3421: ...LAN diag 88 General Diagnostic Table LAN SYSTEM DIAGNOSTICS...
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Страница 3560: ...WI 141 Combination Meter System WIRING SYSTEM 2 LUMINESCENT METER WI 16973 C M LM 01 C M LM 01 i10 CONNECT 22 21 20 19 2 1 40 39...