Mitsubishi Galant 9G. Manual - part 1513

 

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Mitsubishi Galant 9G. Manual - part 1513

 

 

GENERAL DESCRIPTION

TSB Revision

POWER STEERING

37-3

GENERAL DESCRIPTION

M1372000100360

Power steering has been adopted in all vehicles to 
make the steering system easier to handle.

• A 4-spoke steering wheel is used. 

• A steering column has a shock absorbing mecha-

nism and a tilt steering mechanism.

• A rack and pinion steering gear is used.

• An oil pump responsive to engine RPM is used, 

to enhance steering stability at high speeds.

• The separate plastic resin oil reservoir is used to 

reduce weight and to make the fluid level check-
ing easier. 

AC306240

STEERING 
WHEEL

STEERING COLUMN 
ASSEMBLY

PRESSURE HOSE 

OIL RESERVOIR

SUCTION HOSE

RETURN TUBE
ASSEMBLY

OIL PUMP
ASSEMBLY

POWER STEERING GEAR
AND LINKAGE ASSEMBLY

COOLER TUBE
ASSEMBLY

RETURN
HOSE (M)

RETURN
HOSE (R)

<2.4L ENGINE>

AB

AC306241

PRESSURE HOSE 

OIL RESERVOIR

SUCTION HOSE

RETURN TUBE
ASSEMBLY

OIL PUMP
ASSEMBLY

<3.8L ENGINE>

AB

POWER STEERING DIAGNOSIS

TSB Revision

POWER STEERING

37-4

POWER STEERING DIAGNOSIS

INTRODUCTION TO POWER STEERING DIAGNOSIS

M1372008500209

Hydraulic power steering is used for all vehicles. 
Faults in the power steering can include excessive 
play of the steering wheel, difficult steering wheel 
operation, noise, vibration, and oil leaks, etc. Possi-
ble causes of these faults can include defects in the 
gear box, oil pump or steering linkage.

POWER STEERING DIAGNOSIS TROUBLESHOOTING STRATEGY

M1372007300202

Use these steps to plan your diagnostic strategy. If 
you follow them thoroughly, you will be sure that you 
have exhausted most of the possible ways to find a 
power steering fault.
1. Gather information from the customer.

2. Verify that the condition described by the 

customer exists.

3. Find the malfunction by following the Symptom 

Chart.

4. Verify malfunction is eliminated.

SYMPTOM CHART

M1372007600225

SYMPTOM

INSPECTION 
PROCEDURE

REFERENCE PAGE

Excessive play of steering wheel

1

P.37-5

Difficult steering wheel operation (insufficient power assist)

2

P.37-5

Rattling noise

3

P.37-7

Shrill noise

4

P.37-8

Squealing noise

5

P.37-8

Hissing noise

6

P.37-9

Droning noise

7

P.37-9

Squeaking noise

8

P.37-10

Vibration

9

P.37-11

Oil leakage from hose connection

10

P.37-12

Oil leakage from hose assembly

11

P.37-12

Oil leakage from oil reservoir

12

P.37-12

Oil leakage from oil pump

13

P.37-13

Oil leakage from steering gear

14

P.37-13

POWER STEERING DIAGNOSIS

TSB Revision

POWER STEERING

37-5

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Excessive Play of Steering Wheel

DIAGNOSIS

STEP 1. Check for looseness at the steering shaft coupling 
section and at the steering wheel linkage.
Q: Is there any looseness?

YES : Repair or replace the part. And then go to Step 3.
NO :  Go to Step 2.

STEP 2. Check the steering wheel free play.
(1) With the engine running (hydraulic operation), set the front 

wheels straight ahead.

(2) Slightly move the steering wheel in both directions, and 

measure the play on the steering wheel circumference 
before the wheels start to move.

Limit: 30 mm (1.2 inch)

(3) If the free play exceeds the limit, set the steering wheel 

straight ahead with the engine stopped. Apply 
approximately 5 N (1.1 pound) to the steering 
circumference and check the play.

Standard value (steering wheel play with engine 
stopped): 10 mm (0.4 inch) or less

Q: Does the play exceed the standard value?

YES : Remove the steering gear box (refer to 

P.37-33

) and 

check the total pinion torque (refer to 

P.37-41

). And 

then go to Step 3.

NO :  Go to Step 3.

STEP 3. Check the steering wheel play.
Verify that the steering wheel play is not excessive.
Q: Is the steering wheel play excessive?

YES : Repeat from Step 1.
NO :  The procedure is complete.

INSPECTION PROCEDURE 2: Difficult Steering Wheel Operation (Insufficient Power Assist)

DIAGNOSIS

STEP 1. Check the drive belt for damage.
Q: Is the drive belt damaged?

YES : Replace the drive belt. And then go to Step 9.
NO :  Go to Step 2.

ACX01122 AB

 

 

 

 

 

 

 

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