Mitsubishi Montero (2004+). Manual — part 1136

REAR SUSPENSION DIAGNOSIS

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REAR SUSPENSION

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REAR SUSPENSION DIAGNOSIS

INTRODUCTION TO REAR SUSPENSION DIAGNOSIS

M1341013100182

If the rear suspension is faulty, the vehicle will not run
straightforward or noise will occur. Incorrect wheel
alignment, malfunction of shock absorber, stabilizer
bar, coil spring, control arms or out-of-balance tires
can cause these problems.

REAR SUSPENSION DIAGNOSIS TROUBLESHOOTING STRATEGY

M1341013200189

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
rear suspension 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

M1341013500210

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Squeaks or Other Abnormal Noise

DIAGNOSIS

STEP 1. Check for loose rear suspension
installation bolts and nuts.

Q: Are the rear suspension installation bolts and nuts

loose?

YES :

Retighten, then go to Step 6.

NO :

Go to Step 2.

STEP 2. Check for malfunction of shock absorber
(worn bushings).

Q: Is the shock absorber (bushings) in good

condition?

YES :

Go to Step 3.

NO :

Replace it, then go to Step 6.

STEP 3. Check the upper arms and/or toe control
arms for deformity or damage.

Q: Are the upper arms and/or toe control arms in

good condition?

YES :

Go to Step 4.

NO :

Replace it, then go to Step 6.

STEP 4. Check the trailing arms for deformity or
damage.

Q: Are the trailing arms in good condition?

YES :

Go to Step 5.

NO :

Replace it, then go to Step 6.

STEP 5. Check the rear frame for deformations or
damage.

Q: Is the rear frame deformed or damaged?

YES :

Adjust or replace it, then go to Step 6.

STEP 6. Retest the system.

Q: Is the malfunction eliminated?

YES :

The procedure is complete.

NO :

Return to Step 1.

SYMPTOM

INSPECTION PROCEDURE

REFERENCE PAGE

Squeaks or other abnormal noise

1

P.34-3

Poor ride

2

P.34-4

Body tilting

3

P.34-4

REAR SUSPENSION DIAGNOSIS

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REAR SUSPENSION

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INSPECTION PROCEDURE 2: Poor Ride

DIAGNOSIS

STEP 1. Check for excessive tire inflation
pressure.

Q: Is the tire inflation pressure correct?

YES :

Go to Step 2.

NO :

Adjust the pressure, then go to Step 4.

STEP 2. Check for malfunction of shock absorber
(weak or broken springs).

Q: Is the shock absorber in good condition?

YES :

Go to Step 3.

NO :

Replace it, then go to Step 4.

STEP 3. Check the stabilizer bar and/or stabilizer
link for deformity or damage.

Q: Is the stabilizer bar and/or stabilizer link deformed

or damaged?

YES :

Go to Step 4.

NO :

Replace it, then go to Step 4.

STEP 4. Retest the system.

Q: Is the malfunction eliminated?

YES :

The procedure is complete.

NO :

Return to Step 1.

INSPECTION PROCEDURE 3: Body Tilting

DIAGNOSIS

STEP 1. Check for weak or deteriorated
bushings.

Q: Are the bushings in good condition?

YES :

Go to Step 2.

NO :

Replace it, then go to Step 6.

STEP 2. Check for weak or broken springs.

Q: Are the springs in good condition?

YES :

Go to Step 3.

NO :

Replace it, then go to Step 6.

STEP 3. Check the upper arms and/or lower arms
and/or toe control arms for deformity or damage.

Q: Are the upper arms and/or lower arms and/or toe

control arms deformed or damaged?

YES :

Replace it, then go to Step 6.

NO :

Go to Step 4.

STEP 4. Check the trailing arms for deformity or
damage.

Q: Are the trailing arms deformed or damaged?

YES :

Replace it, then go to Step 6.

NO :

Go to Step 5.

STEP 5. Check the rear frame for deformity or
damage.

Q: Is the rear frame deformed or damaged?

YES :

Replace it, then go to Step 6.

NO :

Go to Step 6.

STEP 6. Retest the system.

Q: Is the malfunction eliminated?

YES :

The procedure is complete.

NO :

Return to Step 1.

SPECIAL TOOLS

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REAR SUSPENSION

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SPECIAL TOOLS

M1341000600262

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991897
Ball joint remover

MB991113-01,
MB990635-01 or General
service tool

Ball joint disconnection
NOTE: Steering linkage
puller (MB990635 or
MB991113) is also
available to disconnect
ball joint.

MB990326
Preload socket

General service tool

Ball joint turning torque
check

MB990799
Ball joint dust cover
installer

MB990799-01

Upper arm ball joint dust
cover installation

MB990881
Rear suspension bushing
arbor

−

Lower arm bushing
removal and press-fitting

MB990800
Ball joint remover and
installer

MB990800-01 or General
service tool

Toe control arm ball joint
dust cover installation

MD998236
Output shaft bearing
installer

−

Trailing arm bushing
removal and press-fitting

AC106827

MB990326

MB990799

MB990881

MB990799

ON-VEHICLE SERVICE

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REAR SUSPENSION

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ON-VEHICLE SERVICE

REAR WHEEL ALIGNMENT CHECK AND
ADJUSTMENT

M1341011000264

1. The front suspension, steering system and wheel and tires

must be serviced to normal condition before measuring the
wheel alignment.

2. Measure the wheel alignment with the vehicle parked on a

level surface.

Toe-in

Standard value: 3

± 3 mm (0.12 ± 0.12 inch)

If toe-in is not within the standard value, adjust as follows.
1. Be sure to adjust the camber before making toe adjustment.
2. Adjust by turning the toe adjusting bolt (toe control arm

mounting bolt which faces the inside of the body).

Left wheel: Turning clockwise (

−) toe-in

Right wheel: Turning clockwise (+) toe-in

Camber

Standard value: 0

° ± 30' (difference between right and

left wheels: less than 30')

Use the compensator to measure camber.
If camber is not within the standard value, adjust by following
procedures.

1. Adjust by turning the camber adjusting bolt of the lower arm.

Left wheel: Turning clockwise (

−) camber

Right wheel: Turning clockwise (+) camber

2. After adjusting the camber, the toe-in should be adjusted.

ACX00733

TOE
ADJUSTMENT
BOLT

TOE
CONTROL ARM

AB

ACX00712AB

COMPENSATOR

ACX00734AB

LOWER ARM

CAMBER
ADJUSTMENT
BOLT