Mitsubishi Lancer Evolution X. Manual — part 224
POWER STEERING DIAGNOSIS
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POWER STEERING
37-11
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-in.
Standard value: 0 ± 2 mm (0 ± 0.08 inch)
(3) Adjust the toe-in 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 : Adjust the steering angle (Refer to
). Then go
to Step 3.
STEP 2. Check the steering gear for damage.
Q: Is there damage?
YES : Repair or replace the part (Refer to
). 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.
Inner wheel
33° 10' ± 1° 30'
(Left/right deviation
within 2° 00’)
Outer wheel (reference
value)
28° 10'
AC000756AB
AC705438 AC
Clip
Jam nut
POWER STEERING DIAGNOSIS
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POWER STEERING
37-12
INSPECTION PROCEDURE 9: Vibration
NOTE: A slight vibration may be felt when the stationary steering 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
STEP 1. Check for entry of air.
Q: Is the power steering fluid foamy?
YES :
Bleed the air (Refer to
). Then go to
Step 3.
NO :
Go to Step 2.
STEP 2. Check the steering gear for damage.
Q: Is there damage?
YES :
). Then
go to Step 3 .
NO :
Go to Step 3.
STEP 3. Retest the system.
Confirm that no vibration is generated.
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 return tube
flare nut.
Q: Is the flare nut loose?
YES :
Tighten it to standard value (Refer to
). Then go to Step 3.
NO :
Go to Step 2.
STEP 2. Check the hose connection and the
clamp installation.
Q: Are they correct?
YES :
Go to Step 3.
NO :
Repair or replace the part (Refer to
). 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 :
Replace it (Refer to
). 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.
POWER STEERING DIAGNOSIS
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POWER STEERING
37-13
INSPECTION PROCEDURE 12: Oil Leakage from Oil Reservoir
DIAGNOSIS
STEP 1. Check the oil reservoir for damage.
Q: Is there damage?
YES :
Replace the oil reservoir (Refer to
).
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 :
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 :
). 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.
INSPECTION PROCEDURE 14: Oil Leakage from Steering Gear
DIAGNOSIS
STEP 1. Check the steering gear housing for
damage.
Q: Is there damage?
YES :
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 :
). 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
37-14
SPECIAL TOOLS
M1372000601539
Tool
Tool number and
name
Supersession
Application
MB991955
a: MB991824
b: MB991827
c: MB991910
d: MB991911
e: MB991825
f: MB991826
M.U.T.-III Sub
Assembly
a: Vehicle
communication
interface (V.C.I.)
b: M.U.T.-III USB
Cable
c: M.U.T.-III Main
Harness A
(Vehicles with
CAN
communication
system)
d: M.U.T.-III Main
Harness B
(Vehicles
without CAN
communication
system)
e: M.U.T.-III main
harness C (for
Daimler models
only)
f: M.U.T.-III trigger
Harness
MB991824-KIT
NOTE: G:
MB991826
M.U.T.-III Trigger
Harness is not
necessary when
pushing V.C.I.
ENTER key.
CAUTION
For vehicles with CAN
communication, use M.U.T.-III main
harness A to send simulated
vehicle speed. If you connect
M.U.T.-III main harness B instead,
the CAN communication does not
function correctly.
Power steering system air bleeding
(Calibration by using the scan tool)
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
Preload socket
General service
tool
Tie rod end ball joint breakaway
torque check
MB991910
MB991826
MB991955
MB991911
MB991824
MB991827
MB991825
a
b
c
d
e
f
DO NOT USE
AC106827
MB990326
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