Page 2817 of 3870
Fig. 2: Symptom Chart
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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. Then go to Step 3 .
NO: Go to Step 2.
STEP 2. Check the steerin
g wheel free
play.
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2818 of 3870
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 POWER STEERING
GEAR BOX AND LINKAGE
) and check the total pinion torque (Refer
to STEERING GEAR TOTAL PINION TORQUE CHECK
). Then go
to Step 3.
NO
: Go to Ste
p 3.
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2819 of 3870
Fig. 3: Checking Steering Wheel Free Play
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 3. Check the steering wheel play.
Verify that the steering wheel play is not excessive.
Q: Is the steering wheel play excessive?
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2820 of 3870

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. Then go to Step 9 .
NO: Go to Step 2.
STEP 2. Check the power steering oil pump drive belt tension.
Refer to 7. DRIVE BELTS (FOR GENERATOR, POWER STEERING OIL PUMP AND AIR CONDITIONING) (CHECK)
.
Q: Is the power steering oil pump drive belt tension within the standard
value?
YES: Go to Step 3.
NO: Adjust the tension. (Refer to 7. DRIVE BELTS (FOR
GENERATOR, POWER STEERING OIL PUMP AND AIR CONDITIONING) (CHECK)
). Then go to Step 9 .
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.
Q: Is the check result OK?
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2821 of 3870
YES: Go to Step 4.
NO: Bleed the air (Refer to POWER STEERING SYSTEM AIR BLEEDING
). Then go to Step 9 .
Fig. 4: Checking Fluid Level (Difficult Steering Wheel Operation)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 4. Check each hose for crushing or twisting.
Q: Is any hose crushed or twisted?
YES: Re
pair or re
place the hose. Then
go to Ste
p 9 .
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2822 of 3870
NO: Go to Step 5.
STEP 5. Check for oil leaks.
Q: Are there oil leaks?
YES: Find the cause of the oil leakage and repair it. Then go to Step 9 .
NO: Go to Step 6.
STEP 6. Check the wheel alignment (camber and caster).
Refer to FRONT WHEEL ALIGNMENT CHECK AND ADJUSTMENT
.
Q: Is the alignment incorrect?
YES: Adjust alignment. Then go to Step 9 .
NO: Go to Step 7.
STEP 7. Check the gear box rack piston seal for damage.
Q: Is there damage?
YES: Replace it. Then go to Step 9 .
NO: Go to Step 8.
STEP 8. Check for excessive tie rod end ball joint breakaway torque.
Refer to TIE ROD END BALL JOINT BREAKAWAY TORQUE
CHECK
.
Q: Is the breakaway torque out of specification?
YES: Replace the tie rod end. Then go to Step 9.
NO: Go to Step 9.
STEP 9. Check the steering wheel operation.
Verify that the steering wheel operation is not difficult.
Q: Is the steering wheel operation difficult?
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
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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. 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. 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.
INSPECTION PROCEDURE 4: SHRILL NOISE DIAGNOSIS
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor
Page 2824 of 3870
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 POWER STEERING SYSTEM AIR
BLEEDING
). Then
go to Ste
p 3.
2004 Mitsubishi Endeavor LS
2004 STEERING Power Steering - Endeavor