1998 MITSUBISHI LANCER EVOLUTION IV service

BASIC BRAKE SYSTEM – On-vehicle Service35A-3
If the free play exceeds the standard value, it is probably
due to excessive play between the retaining ring bolt
and brake pedal arm.
Check for excessive clearance and replace faulty parts
as required.
4. Start the engine, depress the brake pedal with
approximately 490 N of force, and measure the clearance
between the brake pedal and the floorboard.
Standard value: 80 mm or more
If the clearance is outside the standard value, check for
air trapped in the brake line, clearance between the lining
and the drum and dragging in the parking brake.
Adjust and replace defective parts as required.
5. Turn back the carpet, etc.

BASIC BRAKE SYSTEM – Master Cylinder and Brake Booster35A-6
INSTALLATION SERVICE POINTS
AVACUUM HOSE CONNECTION
Insert securely and completely until the vacuum hose at the
engine side contacts the edge of the hexagonal part of the
fitting, and then secure by using the hose clip.
BCLEARANCE ADJUSTMENT BETWEEN BRAKE
BOOSTER PUSH ROD AND PRIMARY PISTON
Calculate clearance A from the B, C and D measurements.
A = B – C – D
Standard value: 0.65–0.85 mm
If the clearance is not within the standard value range, adjust
by changing the push rod length by turning the screw of
the push rod.
Measuring
distance BMeasuring
distance D
Block
gaugeB
AC
D

BASIC BRAKE SYSTEM – Master Cylinder and Brake Booster35A-8
DISASSEMBLY SERVICE POINTS
APISTON STOPPER BOLT DISASSEMBLY
Remove the piston stopper bolt, while depressing the piston.
BPISTON STOPPER RING DISASSEMBLY
Remove the piston stopper ring, while depressing the piston.
INSPECTION

Check the inner surface of master cylinder body for rust
or pitting.

Check the primary and secondary pistons for rust, scoring,
wear, damage or wear.

Check the diaphragm for cracks and wear.

35B-1
ANTI-LOCK
BRAKING
SYSTEM (ABS)
CONTENTS
TROUBLESHOOTING 2. . . . . . . . . . . . . . . . . . . .
1. Inspection Chart for Diagnosis Codes 2. . .
2. Inspection Procedure for Diagnostic
Trouble Codes 3. . . . . . . . . . . . . . . . . . . . . . . .
3. Inspection Chart for Trouble Symptoms 11
4. Inspection Procedure for Trouble
Symptoms 12. . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Check at ABS-ECU Terminals 15. . . . . . . . .
ON-VEHICLE SERVICE 17. . . . . . . . . . . . . . . .
Wheel Speed Sensor Output Voltage
Measurement 17. . . . . . . . . . .
LATERAL ACCELERATION SENSOR 17. . .
WHEEL SPEED SENSOR 18. . . . . . . . . . . . . .

ABS – Troubleshooting35B-2
The EVOLUTION-V is provided with a lateral acceleration sensor in addition to the longitudinal acceleration
sensor, and the ABS-ECU connector is changed in terminal arrangement. When servicing EVOLUTION-V,
therefore, use the following service procedures.
TROUBLESHOOTING
1. INSPECTION CHART FOR DIAGNOSIS CODES
Diagnosis
code No.Diagnosis itemsReference Page
11Wheel speed sensor (FR) system (open- or short-circuit)35B-3
12Wheel speed sensor (FL) system (open- or short-circuit)35B-3
13Wheel speed sensor (RR) system (open- or short-circuit)35B-3
14Wheel speed sensor (RL) system (open- or short-circuit)35B-3
15Wheel speed sensor system (abnormal output signal)35B-4
16ABS-ECU power supply voltage system (abnormal voltage drop or rise)35B-5
21Wheel speed sensor (FR) system35B-2
22Wheel speed sensor (FL) system35B-2
23Wheel speed sensor (RR) system35B-2
24Wheel speed sensor (RL) system35B-2
27AYC monitor system (detective AYC)35B-6
32Longitudinal acceleration sensor circuit system35B-6
33Stop lamp switch system35B-7
41Solenoid valve (FR) system35B-7
42Solenoid valve (FL) system35B-7
43Solenoid valve (RR) system35B-7
44Solenoid valve (RL) system35B-7
51Valve relay system35B-8
53Motor relay system35B-9
63ABS-ECU failureReplace ABS-ECU.
71Lateral acceleration sensor system35B-10

ABS – On-vehicle Service / Lateral Acceleration Sensor35B-17
ON-VEHICLE SERVICE
WHEEL SPEED SENSOR OUTPUT VOLTAGE
MEASUREMENT
The EVOLUTION-V has the ABS-ECU connector terminal
arranged as shown at left. Accordingly, the terminals to
measure the output voltage of the wheel speed sensors are
different from EVOLUTION-V.
Follow the conventional procedures except these pick-out
terminals.
Measurement terminals:
Front LHFront RHRear LHRear RH
71098
20232221
LATERAL ACCELERATION SENSOR
INSPECTION
Use the same procedures as those for the conventional
longitudinal acceleration sensor.
ABS-ECU connector harness side
Longitudinal
acceleration
sensor
Lateral acceleration sensor

36-1
PARKING
BRAKES
CONTENTS
SERVICE SPECIFICATIONS 2. . . . . . . . . . . . . .
LUBRICANTS 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS 2. . . . . . . . . . . . . . . . . . . . . . . . ON-VEHICLE SERVICE 3. . . . . . . . . . . . . . . . . .
1. Parking Brake Lever Stroke Check and
Adjustment 3. . . . . . . . . . . . . . . . . . . . . . . . . . .
2. Lining Running-in 4. . . . . . . . . . . . . . . . . . . . . .
PARKING BRAKE CABLE 5. . . . . . . . . . . . . . .
PARKING BRAKE DRUM 7. . . . . . . . . . . . . . . .

PARKING BRAKE – Service Specifications / Lubricants / Special Tools36-2
The parking brake is designed as a drum-in-disc brake acting on the rear wheel. This brake is a little
different in construction between EVOLUTION-IV and EVOLUTION-V but much alike in the service procedure
of the parking brake section. In this group, therefore, the description is made only for EVOLUTION-IV.
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
Parking brake lever stroke (operating force approx. 196 N {20 kgf})5 – 7 notches–
Brake lining thickness mm2.81.0
Brake drum I.D. mm168169
LUBRICANTS
ItemsSpecified lubricantQuantity
Backing plateCHUO YUKA AKB100As required
Shoe & lining assembly
Adjuster
SPECIAL TOOLS
ToolNumberNameUse
MB990767End yoke holderFixing of hub
MB990241
A: MB990242
B: MB990244Axle shaft puller
A: Puller shaft
B: Puller barRemoval of drive shaft
MB991354Puller body