1998 MITSUBISHI LANCER EVOLUTION IV check oil

REAR AXLE – LSD Case Assembly 27-48
BSCREW TIGHTENING
(1) Align the alignment mark on differential case A with that
on differential case B.
(2) Tighten the screws connecting differential case A and
B a uniform amount little by little in the diagonal order.
NOTE
If tightening the screws does not bring the two cases
properly together, spring plates are not probably
assembled properly. Reassemble from the start.
CLSD DIFFERENTIAL TORQUE CHECK
(1) Using the special tool, check for differential torque.
Standard value:
When new clutch plate is
installed Nm {kgf
m}When existing clutch plate is
reused Nm {kgf
m}
5 – 19 {0.5 – 1.9}2 – 19 {0.2 – 1.9}
NOTE
Before measuring the differential torque, first turn the
gears so they snug each other, then take measurements
during rotation.
(2) If the measurement falls outside the specified range,
disassemble the differential case assembly and repair
or replace defective parts.
INSPECTION
1. DIFFERENTIAL CASE INTERNAL PARTS
CONTACT/SLIDING SURFACE CHECK
(1) Clean the disassembled parts with cleaning oil and dry
them with compressed air.
(2) Check each plate, disc, and pressure ring for the following:
A. Friction and sliding surfaces of friction discs, friction
plates, and spring plates.
Replace a defective part with heat discoloration and
excessive wear with a new one, as it degrades locking
performance.
NOTE
If the inner periphery of the friction face shows traces
of harsh contact, it is because of the spring tension
of each plate, disc and other part. Do not confuse
this with abnormal wear.
B. Inner periphery and outer periphery protrusions of
friction discs, friction plates, and spring plates.
Replace a cracked or damaged part with a new one.
C. Friction and sliding surfaces between pressure rings
and friction discs.
MB990989MB990990
Friction disc
Friction plateSpring plate
Pressure ring

REAR AXLE – LSD Case Assembly 27-49
Grind a dented or scratched part with oil stone and
then lap and correct with a compound on a surface
plate.
NOTE
If the inner periphery of the friction face shows traces
of harsh contact, it is because of the spring tension
of each plate, disc and other part. Do not confuse
this with abnormal wear.
(3) Check the following parts for contact and sliding surfaces
(D to M) and correct burrs and dents with oil stone.
D: Sliding surfaces of side gear and case
E: Contacting surfaces of differential case and spring
plate
F: Contacting surfaces of pressure ring and differential
case inner face
G: Sliding surfaces of pressure ring hole and side gear
H: Protrusions on outer periphery of pressure ring
I: Pressure ring inner surface and differential pinion
gear spherical surface
J: Pressure ring V-groove and pinion shaft V
K: Sliding surfaces of pinion shaft and differential pinion
gear hole
L: Side gear grooves on outer periphery
M: Slits in inner periphery of differential
2. FRICTION PLATE AND FRICTION DISC
DISTORTION CHECK
Apply a dial indicator to the friction plate or disc on a surface
plate and, turning the friction plate or disc, measure the
distortion (flatness).
Limit: 0.08 mm (total runout)
3. FRICTION PLATE, FRICTION DISC, AND SPRING
PLATE WEAR CHECK
(1) For the purpose of determining wear, measure thickness
(A, B) of the friction surface and protrusion at several
places and find the difference between the two.
Limit: 0.1 mm
(2) If the wear exceeds the limit, replace the part with a
new one.

ABS – Troubleshooting35B-7
Code No.33: Stop lamp switch system (open circuit or
stop lamp stays ON)Probable cause
This code is output, if the stop lamp switch is continuously on for 15 minutes or
more.
Malfunction of stop lamp switch

Malfunction of wiring harness or connector

Malfunction of ABS-ECU
OK
Check the trouble symptom.NGCheck the harness wire, and repair
if necessary.

Between dedicated fuse No. 11
and ABS-ECU
OK
Check the trouble symptom.NGReplace the ABS-ECU.
OK
Check the trouble symptom.NGCheck the harness wire, and repair
if necessary.

Between stop lamp switch and
ABS-ECU
OK
Check the following connectors:
B-15, B-21, B-25, B-32, B-65NG
Repair
OK
Check the following connector:
B-25NG
Repair
YES
Measure at the ABS-ECU connector
B-25.

Disconnect the connector, and
measure at the harness side
connector.

Stop lamp switch: ON

Voltage between 34 and body
ground
OK:Battery voltageNG
Check the following connectors:
B-25, B-32, B-65NG
Repair
OK
Stop lamp switch checkNG
Repair
Does the stop lamp turn on and off
normally?NOStop lamp switch installation checkNG
Repair
Code No. 41, 42, 43, 44: Solenoid valve systemProbable cause
ABS-ECU monitors the solenoid valve energization circuit at all times. This code is
output when no current flows through the solenoid even when ABS-ECU energizes
it or when current continues flowing through the solenoid even when ABS-ECU
deenergizes it, which is considered to be attributable to an open- or short-circuited
solenoid coil or open- or short-circuited harness.
Defective hydraulic unit

Defective harness or connector

Defective ABS-ECU
OK
Replace the ABS-ECU.
OK
Check the trouble symptom.NGCheck the harness between hydraulic
unit (solenoid valve) and ABS-ECU.NG
Repair
OK
Check the trouble symptom.NGCheck and repair the harness between
hydraulic unit and valve relay.
OK
Check the following connectors:
A-21, B-24, B-25NG
Repair
OK
Measure at A-22 hydraulic unit connec-
tor and A-76 valve relay connector.

Disconnect the connector and
measure at the harness side.

Continuity across the following
terminals
Hydraulic Valve relay
unit side side
11–3
OK:Battery voltageNGCheck the following connectors:
A-22, A-76NG
Repair
Check the solenoid valve.NGReplace the hydraulic unit.

37A-1
STEERING
CONTENTS
SERVICE SPECIFICATIONS 2. . . . . . . . . . . . . .
SPECIAL TOOLS 2. . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE 2. . . . . . . . . . . . . . . . . .
1. Steering Angle Check 2. . . . . . . . . . . . . . . . .
2. Oil Pump Belt Tension Check and
Adjustment 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
STEERING WHEEL
3. . . . . . . . . . . . . . . . . . . .
POWER STEERING GEAR & LINKAGE 3. . .
POWER STEERING OIL PUMP 7. . . . . . . . . . .
POWER STEERING FLUID COOLER 9. . . . .

STEERING – Service Specifications / Special Tools / On-vehicle Service37A-2
SERVICE SPECIFICATIONS
ItemsStandard value
Steering angleEVOLUTION-IVInner wheel33
30’ ± 2

Outer wheel28
20’
EVOLUTION-VInner wheel33
10’ ± 2

Outer wheel28
10’
Steering gearPinion total turning torque
Nm {kgfcm}
Total turning torque0.9 – 1.7 {9 – 17}
Nm {kgf
cm}Torque fluctuations0.4 {4} or less
SPECIAL TOOLS
ToolNumberNameUse
MB991197Installer barPressfitting of gear housing oil seal
MB991199Oil seal installer
MB991214Oil seal protectorInstallation of rack assembly
ON-VEHICLE SERVICE
1. STEERING ANGLE CHECK
Locate front wheels on turning radius gauge and measure
steering angle.
Standard value:
Inner wheel
33
30’ ± 2

33
10’ ± 2

Outer wheel
28
20’
28
10’
When the angle is not within the standard value, the toe
is probably incorrect. Adjust toe (Refer to GROUP 33A –
On-vehicle Service) and recheck steering angle.
2. OIL PUMP BELT TENSION CHECK AND
ADJUSTMENT
Refer to GROUP 11 – Engine Adjustments.

CHASSIS ELECTRICAL – Combination Meters54-25
Inspection Procedure 2
Tachometer does not work.
Probable cause
The ignition signal may not be input from the engine, or there may be a malfunction
in the power supply or earth circuit.
Malfunction of tachometer

Malfunction of harness or connector
Disconnect the combination meter con-
nector B-08 and measure at the harness
sides.
1. Measure the voltage between
terminal No.33 and earth.
OK: 5 V
2. Continuity between the terminal
No.34 and earth
OK: Continuity
3. Voltage between the terminal No.42
and earth
OK: System voltage1. NGCheck the following connectors.
B-08, A-36, B-61, B-64, A-41, A-109NG
Repair
OK
Check trouble symptom.NGCheck the harness between the engine-
ECU and combination meter, and repair
if necessary.
2. NGCheck the following connectors.
B-08, B-50, B-64, A-41NG
Repair
OK
Check trouble symptom.NGCheck the harness between the com-
bination meter and the body earth, and
repair if necessary. OK
Replace the tachometer.
3. NG
Check the following connectors.
B-08, B-75, B-76NG
Repair
OK
Check trouble symptom.NGCheck the harness between the power
supply and combination meter, and
repair if necessary.
YESRefer to Group 13 – Troubleshooting,
No. 44 Ignition coils and power
transistors.
OK
MUT-II Self-Diag code
Is the diagnosis code 44 relating to MPI
system output?

CHASSIS ELECTRICAL – Radio and Tape Player54-45
RADIO AND TAPE PLAYER
TROUBLESHOOTING
There is noise when the engine is running.
Kind of Noise (Parenthe-
sized is how noise
sounds.)SymptomCauseRemedy
AM, FM: Ignition noise
(Popping, snapping,
crackling, buzzing)
Popping sound becomes
faster with the increase
of engine speed.

The noise is lost with
ignition switch turned to
ACC.
Mainly due to the
spark plugs.

Due to noise circula-
tion from elsewhere

Noise from the engineCheck the noise capacitor
and earth cable and
replace if necessary. (See
Fig. 1 and Fig. 2.)
AM, FM: Defogger noise
(1) (Murmuring)Occurs when the defogger
switch is turned to ON and
OFF.Noise produced by spark-
ing when the defogger
switch is turned to ON/
OFF enters the glass
antenna.Check the noise capacitor
and replace if necessary.
(See Fig. 1.)
AM, FM: Defogger noise
(2) (Snapping noise)Occurs when the defogger
switch is turned to ON.Noise produced by current
flowing in the defogger
enters the glass antenna.Check the choke coil and
replace if necessary.
(See Fig. 3.)
AM, FM: Defogger noise
(3) (Scratching, gaggling)Occurs when the defogger
switch is turned to ON with
print heater wire broken.Noise produced by spark-
ing where print heater is
broken enters the glass
antenna.Repair the print heater.
AM, FM: Wiper motor
noise (Humming, wheez-
ing)Sound becomes faster with
the increase of wiper speed
and is lost when the wiper is
stopped.Caused by sparking in
wiper motor brush.Replace the wiper motor.
FM: Mirror motor noise
(Humming, wheezing)Occurs when electric mirror
operates.Caused by sparking in
mirror motor brush.Replace the electric
motor.
Other electrical compo-
nents–Noise is emitted by some
electrical components in
long use.Repair or replace electri-
cal components.
Static electricity (Crack-
ling, crinkling)
Noise is stopped when
the vehicle comes to a
complete stop.

Noise becomes louder
when the clutch is
released.Occurs when parts or
wiring move for some
reason and contact metal
parts of the body.Put parts or wiring into
position.
Various noises are produced
by body parts.Due to electrical detach-
ment of the hood, exhaust
pipe and muffler, suspen-
sion, etc. from the body.Tighten mounting bolts
securely. In many cases,
remedy of one part does
not eliminate the problem
due to incomplete earthing
elsewhere.
Caution
(1) Never let the noise filter contact a high tension cable. The noise filter could break down.
(2) Check that there is no external noise. This check is necessary to prevent misidentification of noise
sources.
(3) Noise prevention should be performed by eliminating noise sources in the descending order of loudness.