Mitsubishi Galant (2004+). Manual - part 1425

POWER STEERING DIAGNOSIS

TSB Revision

POWER STEERING

37A-9

INSPECTION PROCEDURE 6: Hissing Noise

DIAGNOSIS

STEP 1. 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.

Q: Is the check result OK?

YES : Go to Step 2.
NO :  Bleed the air (Refer to 

P.37A-22

). And then go to Step 

4 .

STEP 2. Check each hose for crushing or twisting.
Q: Is any hose crushed or twisted?

YES : Repair or replace the hose. And then go to Step 4.
NO :  Go to Step 3.

STEP 3. Check the steering gear for damage.
Q: Is there damage?

YES : Repair or replace the part. And 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.

ACX01131

WHILE ENGINE
RUNNING

WHILE ENGINE
STOPPED

AB

FLUID FLUCTUATION

POWER STEERING DIAGNOSIS

TSB Revision

POWER STEERING

37A-10

INSPECTION PROCEDURE 7: Droning Noise

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 normal.
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. And then go to Step 3.

STEP 2. Check the oil pump for damage.

Q: Is there damage?

YES : 

Replace the oil pump. And 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 8: Squeaking Noise

DIAGNOSIS

STEP 1. Check for interference of the wheel and the 
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:

(2) If the steering angle is not within the standard value, adjust 

the toe.

Standard value: 0 

± 3 mm (0 ± 0.12 inch)

(3) Adjust the toe by undoing the clip and jam nut, and turning 

the left and right tie rod turnbuckles by the same amount (in 

opposite directions).
NOTE: The toe will move out as the left turnbuckle is turned 
toward the front of the vehicle and the right turnbuckle is 
turned toward the rear of the vehicle.

Q: Is the steering angle normal?

YES : Go to Step 2.
NO :  Repeat the toe adjustment. And then go to Step 3.

ITEM

GTS MODELS

OTHER MODELS

Inner wheel

33

°48' ± 2°00'

37

°12' ± 2°00'

Outer wheel
(reference)

28

°18'

30

°18'

AC000756AB

AC305785

AB

JAM NUT

CLIP

POWER STEERING DIAGNOSIS

TSB Revision

POWER STEERING

37A-11

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

YES : Repair or replace the part. And 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 9: Vibration

NOTE: A slight vibration may be felt when the stationary steer-
ing effort is made due to the condition of the road surface. To 
check whether the vibration actually exists or not, test-drive the 
vehicle on a dry concrete or asphalt surface. A very slight 
amount of vibration is not a malfunction.
DIAGNOSIS

STEP1. Check the tires for out-of-balance.
Q: Is the check result OK?

YES : Go to Step 2.
NO :  Balance the tires (Refer to GROUP 31, Wheel and 

Tire Diagnosis 

− Wheel Balance Accuracy 

P.31-3

). 

And then go to Step 4.

STEP 2. 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.

Q: Is the check result OK?

YES : Go to Step 3.
NO :  Bleed the air (Refer to 

P.37A-22

). And then go to Step 

4 .

ACX01131

WHILE ENGINE
RUNNING

WHILE ENGINE
STOPPED

AB

FLUID FLUCTUATION

POWER STEERING DIAGNOSIS

TSB Revision

POWER STEERING

37A-12

STEP 3. Check the steering gear for damage.
Q: Is there damage?

YES : Repair or replace the part. And then go to Step 4.
NO :  Go to Step 4.

STEP 4. Retest the system.

Confirm that there is no steering wheel vibration.
Q: Is there vibration?

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

INSPECTION PROCEDURE 10: Oil Leakage from Hose Connection

DIAGNOSIS

STEP 1. Check for loosening of the 
pressure/return tube flare nut.

Q: Is the flare nut loose?

YES : 

Tighten it to 15 

± 3 N⋅m (11 ± 2 ft-lb). And 

then go to Step 3.

NO : 

Go to Step 2.

STEP 2. Check the hose connection and the 
clamp installation.

 Refer to 

P.37A-57

.

Q: Are they correct?

YES : 

Go to Step 3.

NO : 

Correct hose connection and/or clamp 
installation. And then go to Step 3.

STEP 3. Retest the system.

Check that no oil is leaking.

Q: Is there oil leakage?

YES : 

Repeat from Step 1.

NO : 

The procedure is complete.

INSPECTION PROCEDURE 11: Oil Leakage from Hose Assembly

DIAGNOSIS

STEP 1. Check the hose for damage or clogging.

Q: Is the hose damaged or clogged?

YES : 

Repair or replace it. And then go to Step 2.

NO : 

Go to Step 2.

STEP 2. Retest the system.

Check that no oil is leaking.

Q: Is there oil leakage?

YES : 

Repeat from Step 1.

NO : 

The procedure is complete.