Mitsubishi Montero Sport (2004+). Manual - part 821

POWER STEERING DIAGNOSIS

TSB Revision

STEERING

37A-7

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

− Front Wheel Align-

ment Check and Adjustment 

P.33A-3

.

Q: Is the alignment incorrect?

YES : Adjust it. Then go to Step 10.
NO :  Go to Step 8.

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

YES : Replace it. 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.37A-17

.

Q: Is there fault?

YES : Replace the part. Then go to Step 10.
NO :  There is no action to be taken.

STEP 10. Check steering wheel operation.
Verify that 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 gear box 
installation.

Q: Is the oil pump and gear box installation correct?

YES : 

Go to Step 2.

NO : 

Repair it. Then go to Step 4.

STEP 2. Check for interference of other parts with 
the steering column and 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 gear box.

Q: Is there noise?

YES : 

Replace the part. Then go to Step 4.

NO : 

There is no action to be taken.

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

TSB Revision

STEERING

37A-8

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.37A-20

. 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. Then go to Step 3.

NO : 

There is no action to be taken.

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 belt tension.
(1) Refer to GROUP 00, Maintenance Service 

− 

Drive Belt 

P.00-46

.

Q: Is the belt tension incorrect?

YES : 

Adjust the belt tension. 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. Then go to Step 3.

NO : 

There is no action to be taken.

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 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.37A-20

. 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 : 

Repair or replace the hose. Then go to Step 

4.

NO : 

Go to Step 3.

STEP 3. Check the steering box for damage.

Q: Is there damage?

YES : 

Repair or replace the part. Then go to Step 

4.

NO : 

There is no action to be taken.

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.

POWER STEERING DIAGNOSIS

TSB Revision

STEERING

37A-9

INSPECTION PROCEDURE 7 : Droning Noise

.

DIAGNOSIS

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

Q: Is the oil pump or oil pump bracket installation 

correct?
YES : 

Go to Step 2.

NO : 

Repair it. 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. Then go to Step 3.

NO : 

There is no action to be taken.

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

TSB Revision

STEERING

37A-10

 INSPECTION PROCEDURE 8: Squeaking Noise

.

DIAGNOSIS

STEP 1. Check for interference of the wheel and vehicle 
body.
If interfering, adjust the steering angle.
(1) Place the front wheel on a turning radius gauge and 

measure the steering angle.

Standard value:

CAUTION

When the steering wheel is turned to lock, check that the 
clearance between the knuckle and the stopper is 1 mm 
(0.04 inch) or more.

(2) Check that the toe-in is within the standard value. If the 

steering angle is outside the standard value, adjust the 
toe-in. (Refer to GROUP 33A, On-vehicle Service 

P.33A-3

.)

Standard value: 3.5 

± 3.5 mm (0.14 ± 0.14 inch)

(3) Adjust the steering angle with the stopper bolt.
Q: Is the steering angle normal?

YES : Go to Step 2.
NO :  Adjust the steering angle, and Then go to Step 3.

STEP 2. Check the steering gear box for damage.
Q: Is there damage?

YES : Repair or replace the part. Then go to Step 3.
NO :  There is no action to be taken.

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.

ITEM

SPECIFICATION

Inside wheel

29

°40' − 32°40'

Outside wheel (reference)

29

°30'

AC000756

AC004561 AB

KNUCKLE

LOWER ARM

1 mm 
(0.04 in) OR MORE

AC004188

STOPPER BOLT

IDLER ARM

STOPPER BOLT

IDLER ARM

80 N·m
59 ft-lb

AB

80 N·m
59 ft-lb