Mitsubishi Evolution X. Manual — part 872
POWER STEERING DIAGNOSIS
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POWER STEERING
37-11
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. 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.
INSPECTION PROCEDURE 12: Oil Leakage from Oil Reservoir
DIAGNOSIS
STEP 1. Check the oil reservoir for damage.
Q: Is there damage?
YES :
Repair or replace it. Then go to Step 3.
NO :
Go to Step 2.
STEP 2. Check for overflowing.
Q: Is there oil overflowing from the reservoir?
YES :
Adjust fluid level. Then go to Step 3.
NO :
Go to Step 3.
STEP 3. Retest the system.
Q: Is there oil leakage?
YES :
Repeat from to Step 1.
NO :
The procedure is complete.
INSPECTION PROCEDURE 13: Oil Leakage from Oil Pump
DIAGNOSIS
STEP 1. Check the oil pump body for damage.
Q: Is there damage?
YES :
Replace the part. Then go to Step 3.
NO :
Go to Step 2.
STEP 2. Check the O-ring or oil seal for damage.
Q: Is there damage?
YES :
Replace the part. Then go to Step 3.
NO :
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.
SPECIAL TOOLS
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POWER STEERING
37-12
INSPECTION PROCEDURE 14: Oil Leakage from Steering Gear
DIAGNOSIS
STEP 1. Check the steering gear housing for
damage.
Q: Is there damage?
YES :
Replace the part. Then go to Step 3.
NO :
Go to Step 2.
STEP 2. Check the oil-ring or oil seal for damage.
Q: Is there damage?
YES :
Replace the part. Then go to Step 3.
NO :
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.
SPECIAL TOOLS
M1372000601175
Tool
Tool number and
name
Supersession
Application
AC106827
MB991897 or
MB992011
Ball joint remover
MB991113-01,
MB990635-01 or
General service
tool
Knuckle and tie rod end ball joint
disconnection
NOTE: Steering linkage puller
(MB990635 or MB991113) is also
available to disconnect knuckle and
tie rod end ball joint.
MB990326
MB990326
Preload socket
General service
tool
Tie rod end ball joint breakaway
torque check
MB991548
MB991548
Power steering oil
pressure gauge
adapter (Pump
side)
MB991548-01
Oil pump pressure test
MB991549
MB991549
Power steering oil
pressure gauge
adapter (Hose
side)
MB991549-01
MB990662
MB990662
Power steering oil
pressure gauge
MB990662-01
MB990784
SPECIAL TOOLS
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POWER STEERING
37-13
MB990784
Ornament remover
General service
tool
Cover removal
MB990803
MB990803
Steering wheel
puller
General service
tool
Steering wheel removal
MB991006
MB990228 or
MB991006
Preload socket
MB990228-01
Steering gear total pinion torque
check
MB990925
MB990925
Bearing and oil
seal installer set
MB990925-01 or
general service
tool
• Oil seal and bearing installation
• MB990927, MB990938, MB990939
(For details, refer to GROUP 26
−
).
MB991203
MB991203
Oil seal and
bearing installer
Tool not available Oil seal and bearing installation
MB992209
MB992209
Bellows band
crimping tool
MB992209
Bellows band installation
Tool
Tool number and
name
Supersession
Application
ON-VEHICLE SERVICE
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POWER STEERING
37-14
ON-VEHICLE SERVICE
STEERING WHEEL FREE PLAY CHECK
M1372001000850
1. With the engine running (hydraulic pressure applied),
position the front wheel in the straight ahead position.
AC609390AB
2. Measure the side to side steering wheel play until the front
wheels actually start moving while turning the steering wheel
slightly in the left and right directions.
Limit: 30 mm (1.2 inch)
3. If the steering wheel play exceeds the limit value, check the
steering shaft joint or steering linkage for looseness, and
replace or repair the faulty components if necessary.
4. If the steering wheel play still exceeds the limit value after
Step 3 is performed, position the steering wheel in the
straight ahead position, and then apply the force
(approximately 5 N) in the circumferential direction.
Standard value (steering wheel play with the engine
stopped): 16.5 mm (0.6 inch) or less
5. If the steering wheel play is outside the standard value after
Step 4 is performed, remove the steering gear and linkage,
and check and adjust the pinion total rotation torque. (Refer
to
STEERING ANGLE CHECK
M1372001101225
CAUTION
After adjusting the steering angle, perform calibration to
make the ASC-ECU learn the neutral position of the steer-
ing wheel sensor. (Refer to GROUP 35C
− On-vehicle Ser-
vice, Steering Wheel Sensor Calibration
1. Check that the wheel alignment is normal. (Refer to GROUP
33
− On-vehicle Service, Wheel Alignment Check and
Adjustment (Refer to
AC000756AB
2. Place the front wheel onto the turning radius gauge, and
measure the steering angle.
Standard value:
Item
Specifications
Inside wheel
33
° 10' ± 1° 30'
Outside wheel (reference value)
28
° 10'
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