1998 MITSUBISHI LANCER EVOLUTION IV power steering fluid

MPI – General Information13-2
MULTIPOINT INJECTION (MPI)
GENERAL INFORMATION
OMPI System Diagram

1 Injector

2 ISC servo

3 Fuel pressure control valve

4 Waste gate solenoid valve

5 Secondary air control solenoid valve
Control relay
Fuel pump relay
A/C relay
Ignition coil
Exhaust temperature warning lamp
Engine warning lamp
Diagnosis output
Alternator G terminal
Fan motor relay
Tachometer
Fuel pump relay No.2 1 Oxygen sensor
2 Air flow sensor
3 Intake air temperature sensor
4 Throttle position sensor
5 Idle switch
6 Camshaft position sensor
7 Crank angle sensor
8 Barometric pressure sensor
9 High temperature sensor
10 Engine coolant temperature sensor
11 Detonation sensor
Power supply voltage
Ignition switch-IG
Ignition switch-ST
Vehicle speed sensor
A/C switch
Power steering fluid pressure switch
Alternator FR signalEngine ECU
1 Oxygen sensor
2 Air flow sensor3
Intake air tem-
perature sensor
4,
5
6 Camshaft position
sensor
7 Crank angle sensor 8 Barometric
pressure sensor
9 High temperature
sensor 10 Coolant temperature sensor
11 Detonation sensor
1 Injector
2 ISC servo

3 Fuel pressure
control valve

4 Waste gate
solenoid valve
5 Secondary air
control solenoid
valveCanister
Check valveFrom
fuel
tank
Throttle position
sensor (with a
built-in
idle
switch)
Secondary
air valve
AirTo fuel
tankFuel
pressure
regulatorFrom
fuel
pump
Waste gate
actuator
Catalytic converter
Given above is the MPI system diagram for EVOLUTION-IV. The MPI system for EVOLUTION-V is different
from this in the following point;
Oxygen sensor with a heater is adopted.
The diagnosis connector power supply circuit is different.
The high temperature sensor is no longer used.

MPI – Troubleshooting13-19
Item
No.Inspection
itemInspection contentsNormal condition
21Engine
coolant
temperature
Ignition switch: ON or with engine
runningWhen engine coolant temper-
ature is –20C–20C
temperature
sensorWhen engine coolant temper-
ature is 0C0C
When engine coolant temper-
ature is 20C20C
When engine coolant temper-
ature is 40C40C
When engine coolant temper-
ature is 80C80C
22Crank angle
sensorEngine: Idling
Idle position switch: ONWhen engine coolant temper-
ature is –20C1,300 – 1,500 rpm
When engine coolant temper-
ature is 0C1,300 – 1,500 rpm
When engine coolant temper-
ature is 20C1,300 – 1,500 rpm
When engine coolant temper-
ature is 40C1,150 – 1,350 rpm
When engine coolant temper-
ature is 80C750 – 950 rpm
25Barometric
pressure
Ignition switch: ONAt altitude of 0 m101 kPa
pressure
sensor
At altitude of 600 m95 kPa
At altitude of 1,200 m88 kPa
At altitude of 1,800 m81 kPa
26Idle position
switchIgnition switch: ON
(Check by operating accelerator
dl tdl )
Throttle valve: Set to idle
positionON
pedal repeatedly.)Throttle valve: Slightly openOFF*1
27Power
steering fluidEngine: IdlingSteering wheel stationaryOFF
tg
pressure
switchSteering wheel turningON
28A/C switchEngine: Idling
(when A/C switch is ON A/C
A/C switch: OFFOFF
(when A/C switch is ON, A/C
compressor should be operating.)A/C switch: ONON

MPI – Troubleshooting13-23
Terminal
No.Normal condition Check condition (Engine condition) Check item
21Fan motor relay (LOW)Fan not operating (coolant temperature: 90C or
below)Battery voltage
Fan at low speed (coolant temperature: 90 – 100C)0 – 3 V
22A/C relayEngine: Idling
A/C switch: OFF to ON (Compressor is being
driven.)Battery voltage, or 6 V
or more instanta-
neously to 0 – 3 V
33Alternator G terminalEngine: Warm, idle (radiator fan: OFF)
Headlamp: OFF to ON
Brake lamp: OFF to ON
Rear defogger switch: OFF to ONVoltage rises by 0.2 –
3.5 V.
36Engine warning lampIgnition switch: OFF → ON0 – 3 V → Battery
voltage (After several
seconds have
elapsed)
37Power steering fluid
pressure switchEngine: Idling after
warming upWhen steering wheel is
stationaryBattery voltage
When steering wheel is
turned0 – 3 V
38Control relayIgnition switch: OFFBattery voltage
Ignition switch: ON0 – 3 V
39Fuel pump relay No.2While engine is idling, suddenly depress the
accelerator pedal.Momentarily rises
slightly from 0 to 3 V.
40Exhaust temperature
warning lampIgnition switch: OFF to ON0 – 3 V to battery
voltage (After several
seconds have
elapsed)
41Alternator FR terminalEngine: Warm, idle (radiator fan: OFF)
Headlamp: OFF to ON
Brake lamp: OFF to ON
Rear defogger switch: OFF to ONVoltage drops by 0.2 –
3.5 V.
45A/C switchEngine: Idle speedTurn the A/C switch OFF0 – 3 V
Turn the A/C switch ON
(A/C compressor is oper-
ating)Battery voltage
60Oxygen sensor heater
(Evolution V only)
Engine: Idling0 – 3 V
(Evolution-V only)
Engine speed: 5,000 r/minBattery voltage
71Ignition switch-STEngine: Cranking8 V or more

MPI – On-vehicle Service13-31
5. MPI SYSTEM COMPONENTS LAYOUT
NameSymbolNameSymbol
A/C switchQExhaust temperature warning lampS
A/C relayHFuel pressure control valveA
Air flow sensor (with a built-in intake air temperaturesensor and barometric pressure sensor)FIgnition coil and power transistor unitLsensor and barometric pressure sensor)InjectorB
Camshaft position sensorMISC servoD
Control relay and fuel pump relayPOxygen sensorK
Coolant temperature sensorEPower steering fluid pressure switchI
Crank angle sensorJSecondary air control solenoid valveN
Detonation sensorCThrottle position sensor (with a built-in idle switch)D
Diagnosis connectorR
Engine ECUOVehicle speed sensorT
Engine warning lampSWastegate solenoid valveG

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 – Power Steering Gear & Linkage37A-5
LUBRICANT AND SEALANT APPLICATION POINTS
Same as before.
DISASSEMBLY SERVICE POINT
Follow the conventional procedures.
REASSEMBLY SERVICE POINTS
Follow the conventional procedures except followings.
AOIL SEAL INSTALLATION
CRACK ASSEMBLY INSTALLATION
(1) Apply a coating of repair kit grease to the rack tooth
face.
Caution
Do not close the vent hole in the rack with grease.
(2) Cover rack serrations with special tool.
(3) Apply the specified fluid on the special tool, seal ring
and O-ring surfaces.
Specified fluid:
MITSUBISHI GENUINE ATF II
Caution
Do not use ATF-SP II.
(4) Slowly insert the special tool-covered rack into the gear
housing from power cylinder side.
Caution
When inserting the rack, align the oil seal center with
the tip of the special tool to prevent the retainer spring
from slipping.
MB991197 Gear housing
Oil seal
MB991199
Vent hole
Seal ring, O-ring
MB991214
Oil seal

STEERING – Power Steering Oil Pump37A-7
POWER STEERING OIL PUMP

REMOVAL AND INSTALLATION
Pre-removal Operation
Power Steering Fluid DrainingPost-installation Operation
(1) Power Steering Fluid Supplying
(2) Drive Belt Tension Adjusting
(Refer to GROUP 11 – On-vehicle Service.)
12 3
4 5
6 7
8 9 10
Unit: Nm {kgf
m}
49 {5.0}
59 – 69
{6.0 – 7.0} 10 – 12
{1.0 – 1.2}39 {4.0}
49 {5.0}
18 {1.8}
12 {1.2}
39 {4.0}
Removal steps
1. Drive belt
2. Pressure switch connector
3. Suction hose
4. Pressure hose
5. O-ring6. Heat protector
7. Bolt
8. Bolt
9. Oil pump assembly
10. Oil pump bracket

STEERING – Power Steering Oil Pump37A-8

REMOVAL AND INSTALLATION
Pre-removal Operation
Power Steering Fluid DrainingPost-installation Operation
(1) Power Steering Fluid Supplying
(2) Drive Belt Tension Adjusting
(3) Power Steering Fluid Line Bleeding
12
34
56
7
8 9 10
Unit: Nm {kgf
m}
22 {2.2}
11
22 {2.2}
52 {5.3}24 {2.4} 12 {1.2}
18 {1.8}
Removal steps
1. Drive belt
2. Suction hose
3. Pully
4. Pressure hose
5. O-ring
6. Heat protector A7. Heat protector B
8. Pressure switch connector
9. Bolt
10. Bolt
11. Oil pump assembly