Mitsubishi Outlander GS45X. Manual - part 1561

POWER STEERING DIAGNOSIS

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POWER STEERING

37-7

STEP 2. Check the drive belt for damage.
Q: Is the drive belt damaged?

YES : Replace the drive belt (Refer to GROUP 11A 

− 

Crankshaft pulley 

P.11A-21

 <2.4L>, GROUP 11C 

− 

Crankshaft pulley 

P.11C-23

 <3.0L>). Then go to Step 

10.

NO :  Go to Step 3.

STEP 3. Check the fluid level.
(1)  Park the vehicle on a flat, level surface, and then start the 

engine.

(2) Turn the steering wheel several times to raise the 

temperature of the fluid to approximately 50 

− 60°C (122 − 

140

°F).

(3)  With the engine running, turn the wheel all the way to the 

left and right several times.

(4) Check the fluid in the oil reservoir for foaming or milkiness. 

Check the difference of the fluid level when the engine is 
stopped, and while it is running. If the change of the fluid 
level is 5 mm (0.2 inch) or more, bleed the air from the 
system. (Refer to 

P.37-25

.)

Q: Is the fluid foamy?

YES : Go to Step 4.
NO :  Go to Step 10.

STEP 4. Check for entry of air.
Q: Has air entered?

YES : Bleed the air (Refer to 

P.37-25

). Then go to Step 10  .

NO :  Go to Step 5.

STEP 5. Check each hose for crushing or twisting.
Q: Is any hose crushed or twisted?

YES : Replace the hose (Refer to 

P.37-55

). Then go to Step 

10 .

NO :  Go to Step 6.

STEP 6. Check for oil leaks.
Q: Are there oil leaks?

YES : Repair it. Then go to Step 10.
NO :  Go to Step 7.

STEP 7. Check the wheel alignment (camber and caster).
Refer to GROUP 33, On-vehicle Service 

− Front Wheel Align-

ment Check and Adjustment 

P.33-8

.

Q: Is the alignment incorrect?

YES : Adjust it (Refer to 

P.33-8

). Then go to Step 10.

NO :  Go to Step 8.

AC608306

With engine stopped

AC

Fluid level change: Within 5 mm (0.2 in)

With engine running

POWER STEERING DIAGNOSIS

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POWER STEERING

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STEP 8. Check the gear box rack piston seal for damage.
Q: Is there damage?

YES : Replace it (Refer to 

P.37-45

). Then go to Step 10.

NO :  Go to Step 9.

STEP 9. Check for excessive tie rod end ball joint 
breakaway torque.
Refer to 

P.37-44

.

Q: Is there fault?

YES : Replace the part(Refer to 

P.37-45

). Then go to Step 

10  .

NO :  Go to Step 10.

STEP 10. Check the steering wheel operation.
Verify that the steering wheel operation is not difficult.
Q: Is the steering wheel operation difficult?

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

INSPECTION PROCEDURE 3: Rattling Noise

DIAGNOSIS

STEP 1. Check for proper oil pump and steering 
gear installation.

Q: Is the oil pump and the steering gear installation 

correct?
YES : 

Go to Step 2.

NO : 

Repair it (Refer to 

P.37-48

, 

P.37-40

). Then 

go to Step 4.

STEP 2. Check for interference of other parts with 
the steering column and the power steering 
hoses.

Q: Is there interference?

YES : 

Correct the interference. Then go to Step 4.

NO : 

Go to Step 3.

STEP 3. Check for noise from inside the oil pump 
or the steering gear.

Q: Is there noise?

YES : 

Replace the part (Refer to 

P.37-51

, 

P.37-45

). Then go to Step 4.

NO : 

Go to Step 4.

STEP 4. Check for rattling noise.
Confirm that no noise is generated.

Q: Is there noise?

YES : 

Repeat from Step 1. 

NO : 

The procedure is complete.

POWER STEERING DIAGNOSIS

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POWER STEERING

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INSPECTION PROCEDURE 4: Shrill Noise

DIAGNOSIS

STEP 1. Check for entry of air.

Q: Is the power steering fluid foamy?

YES : 

Bleed the air (Refer to 

P.37-25

). Then go to 

Step 3.

NO : 

Go to Step 2.

STEP 2. Check for seizure in the oil pump.

Q: Is there seizure?

YES : 

Replace the part (Refer to 

P.37-51

). Then 

go to Step 3 .

NO : 

Go to Step 3.

STEP 3. Retest the system.
Confirm that no noise is generated.

Q: Is there noise?

YES : 

Repeat from Step 1.

NO : 

The procedure is complete.

INSPECTION PROCEDURE 5: Squealing Noise

DIAGNOSIS

STEP 1. Check the power steering oil pump drive 
belt tension.
Refer to GROUP 11A 

− On-vehicle service − Drive 

belt tension check 

P.11A-9

 <2.4L>, GROUP 11C 

− 

On-vehicle service 

− Generator drive belt tension 

check 

P.11C-8

 <3.0L>.

Q: Is the drive belt tension incorrect?

YES : 

Adjust the belt tension (Refer to GROUP 

11A 

− On-vehicle service − Drive belt 

tension check 

P.11A-9

 <2.4L>, GROUP 

11C 

− On-vehicle service − Generator drive 

belt tension check 

P.11C-8

 <3.0L>). Then 

go to Step 3.

NO : 

Go to Step 2.

STEP 2. Check for seizure in the oil pump.

Q: Is there seizure?

YES : 

Replace the part (Refer to 

P.37-51

). Then 

go to Step 3.

NO : 

Go to Step 3.

STEP 3. Retest the system.
Confirm that no noise is generated.

Q: Is there noise?

YES : 

Repeat from Step 1.

NO : 

The procedure is complete.

POWER STEERING DIAGNOSIS

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POWER STEERING

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INSPECTION PROCEDURE 6: Hissing Noise

DIAGNOSIS

STEP 1. Check for entry of air.

Q: Is the power steering fluid foamy?

YES : 

Bleed the air (Refer to 

P.37-25

). Then go to 

Step 4.

NO : 

Go to Step 2.

STEP 2. Check each hose for crushing or 
twisting.

Q: Is any hose crushed or twisted?

YES : 

Replace the hose (Refer to 

P.37-55

). Then 

go to Step 4 .

NO : 

Go to Step 3.

STEP 3. Check the steering gear for damage.

Q: Is there damage?

YES : 

Replace the part (Refer to 

P.37-45

). Then 

go to Step 4 .

NO : 

Go to Step 4.

STEP 4. Retest the system.
Confirm that no noise is generated.

Q: Is there noise?

YES : 

Repeat from Step 1.

NO : 

The procedure is complete.

INSPECTION PROCEDURE 7: Droning Noise

DIAGNOSIS

STEP 1. Check the oil pump or oil pump bracket 
installation.

Q: Is the oil pump or the oil pump bracket installation 

correct?
YES : 

Go to Step 2.

NO : 

Repair it (Refer to 

P.37-48

, 

P.37-40

). Then 

go to Step 3.

STEP 2. Check the oil pump for damage.
NOTE: If a slight "beat noise" is produced by the oil 
pump when the steering wheel is turned fully and 
held in that position, this is not a malfunction.

Q: Is there damage?

YES : 

Replace the oil pump (Refer to 

P.37-51

). 

Then go to Step 3 .

NO : 

Go to Step 3.

STEP 3. Retest the system.
Confirm that no noise is generated.

Q: Is there noise?

YES : 

Repeat from Step 1.

NO : 

The procedure is complete.