1998 MITSUBISHI LANCER EVOLUTION IV coolant temperature

MPI – Troubleshooting13-25
6-2 RESISTANCE AND CONTINUITY BETWEEN HARNESS SIDE CONNECTORS AND
TERMINALS
Engine-ECU Harness Side Connector Terminal Arrangement
Terminal No.Inspection itemNormal condition (Check condition)
1 – 12No.1 injector2 – 3 Ω (At 20C)
14 – 12No.2 injector
2 – 12No.3 injector
15 – 12No.4 injector
3 – 12Fuel pressure control valve28 – 36 Ω (At 20C)
4 – 12Stepper motor coil (A1)28 – 33 Ω (At 20C)
17 – 12Stepper motor coil (A2)
5 – 12Stepper motor coil (B1)
18 – 12Stepper motor coil (B2)
6 – 12Secondary air control solenoid valve28 – 36 Ω (At 20C)
11 – 12Wastegate solenoid valve62 – 74 Ω (At 20C)
13 – Body earthEngine-ECU earthContinuity established (0 Ω)
26 – Body earth
60 – 12Oxygen sensor heater (EVOLUTION-V
only)11 – 18 Ω (at 20C)
72 – 92Intake air temperature sensor5.3 – 6.7 kΩ (When intake air temperature is 0C)
2.3 – 3.0 kΩ (When intake air temperature is 20C)
1.0 – 1.5 kΩ (When intake air temperature is 40C)
0.30 – 0.42 kΩ (When intake air temperature is 80C)
74 – 77High temperature sensor3 Ω or less
83 – 92Engine coolant temperature sensor5.1 – 6.5 kΩ (When coolant temperature is 0C)
2.1 – 2.7 kΩ (When coolant temperature is 20C)
0.9 – 1.3 kΩ (When coolant temperature is 40C)
0.26 – 0.36 kΩ (When coolant temperature is 80C)
87 – 92Idle position switchContinuity established (when throttle valve is at idle
position)
No continuity (when throttle valve is slightly open)
91 – Body earth–Continuity established

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

MPI – On-vehicle Service13-32
6. INTAKE AIR TEMPERATURE SENSOR
CHECK
1. Disconnect the air flow sensor connector.
2. Measure resistance between terminals 5 and 6.
Standard value:
2.3 – 3.0 kΩ (at 20C)
0.30 – 0.42 kΩ (at 80C)
3. Measure resistance while heating the sensor using a hair
drier.
Normal condition:
Temperature (C)Resistance (kΩ)
HigherSmaller
4. If the value deviates from the standard value or the
resistance remains unchanged, replace the air flow sensor
assembly.
7. ENGINE COOLANT TEMPERATURE
SENSOR CHECK
The engine coolant temperature sensor is located as shown
on the left.
Standard value:
2.1 – 2.7 kΩ (at 20C)
0.26 – 0.36 kΩ (at 80C)
8. OXYGEN SENSOR CHECK

The sensor connector is located as shown on the left.

(1) Disconnect the oxygen sensor connector and connect
the special tool (Test Harness: MD998464) to the oxygen
sensor connector.
Equipment sideconnector
Air flow sensor
Intake air temperature sensor
Engine coolant
temperature sensor
Oxygen sensor equipment side connector
Oxygen sensor connector
Oxygen sensor

MPI – On-vehicle Service13-33
(2) Check that there is continuity (11 to 18 Ω at 20C) across
terminal no. 1 (special tool red clip) and terminal no. 3
(special tool blue clip) of the oxygen sensor connector.
(3) If there is no continuity, replace the oxygen sensor.
(4) Run the engine until the engine coolant temperature
exceeds 80C.
(5) Using jumper wires, connect oxygen sensor terminal no.
1 (special tool red clip) and terminal no. 3 (special tool
blue clip) to battery (+) and (–) terminal, respectively.
Caution
Make sure of the correct connections: if a wrong
connection is made, a broken oxygen sensor results.
(6) Connect a digital voltmeter between terminal no. 2 (special
tool black clip) and terminal no. 4 (special tool white clip).
(7) Race the engine repeatedly to measure the oxygen sensor
output voltage.
Standard value:
EngineOxygen sensor
output voltageNOTE
When
engine is
raced0.6 – 1.0 VWhen engine racing is
repeated to enrich air-fuel
ratio, an operational oxygen
sensor should output a volt-
age of 0.6 to 1.0 V.
NOTE
Use the same procedures to remove and install the oxygen
sensor.
Red clip
Blue clip
MD998464
Red clip
Blue clip
MD998464 Black clip
White clip

ENGINE COOLING – Service Specifications / Lubricant / On-vehicle Service14-2
SERVICE SPECIFICATIONS
ItemsStandard value
Thermostat valve opening temperature
CWhen open76.5 ± 1.5
When fully open90
Thermostat lift mm8.5 or more
LUBRICANT
ItemsBrandQuantity dm3 {
}
Coolant capacity (in condenser tank)MITSUBISHI GENUINE DIA QUEEN SUPER
LONG LIFE COOLANT6 {6}
ON-VEHICLE SERVICE
COOLANT REPLACEMENT
CYLINDER BLOCK DRAIN PLUG
Unit: Nm {kgfm}
Drying sealant: HELMESEAL H-1M
44 {4.5}
RADIATOR CAP VALVE OPENING PRESSURE
CHECK
On EVOLUTION-V, the radiator cap valve opening pressure
must be as shown below.
Standard value: 93 – 123 kPa {0.95 – 1.25 kgf/cm
2}
Limit: 83 kPa {0.85 kgf/cm
2}

CHASSIS ELECTRICAL – Combination MetersCHASSIS ELECTRICAL – Combination Meters54-22
COMBINATION METERS
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
SpeedometerAllowable indication range km/h
(Speedometer indication error to be
4037 – 45–
(Speedometer indication error to be
with –6% to +10%)8075 – 88–)
120113 – 132–
160150 – 176–
Pointer fluctuation km/h (at vehicle speeds of higher than 35
km/h)–±3
Tachometer indica-
tion error r/min
700All types of tachometer±100–
tion error r/min3,000Meters measurable up to 6,000 rpm and
meters measurable up to 8,000 rpm+ 150–
Meters measurable up to 9,000 rpm and
meters measurable up to 10,000 rpm+ 225
– 100–
4,750Meters measurable up to 6,000 rpm±160–
5,000Meters measurable up to 8,000 rpm±250–
Meters measurable up to 9,000 rpm and
meters measurable up to 10,000 rpm+ 325
– 125–
6,000Meters measurable up to 8,000 rpm±300–
7,000Meters measurable up to 9,000 rpm and
meters measurable up to 10,000 rpm+ 400
– 100–
8,000Meters measurable up to 10,000 rpm+ 400
– 0–
Fuel gauge unit
resistanceΩ
Main tankFloat point F1.8 ±1.2–
resistance ΩFloat point E65.2 ±4–
Sub tankFloat point F1.2 ±0.8–
Float point E44.8 ±3–
Fuel gauge unit
f
loat height mm
Main tankFloat point F16.4–
float height mmFloat point E122.6–
Sub tankFloat point F17.5–
Float point E134.6–
Engine coolant temperature gauge unit resistance (at 70 C) Ω104 ±13.5–
Fuel gauge resis-
tanceΩ
Power supply and earth192 ±19.2–
tance ΩPower supply and fuel gauge89 ±8.9–
Fuel gauge and earth103 ±10.3–
Engine coolant
temperature gauge
Power supply and earth187 ±18.7–
temperature gauge
resistance ΩPower supply and engine coolant temperature gauge90 ±4.5–
Engine coolant temperature gauge and earth247 ±24.7–

CHASSIS ELECTRICAL – Combination Meters54-23
SEALANT
ItemsSpecified sealantRemark
Engine coolant temperature gauge
unit threaded portion3M Adhesive nut locking No. 4171 or
equivalentDrying sealant
SPECIAL TOOLS
ToolNumberNameUse
A
B
C
D
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222Harness set
A: Test harness
B: LED harness
C: LED harness
adapter
D: ProbeFuel gauge simple check
A: Connector pin contact pressure check
B, C: Power circuit check
D: Commercial tester connection

CHASSIS ELECTRICAL – Combination Meters54-29
FUEL GAUGE UNIT FLOAT HEIGHT
Move float and measure the height at point F (A) and at
point E (B) with float arm touching stopper.
Standard value:
Float positionMainSub
Point F16.417.5
Point E122.6134.6
FUEL LEVEL SENSOR (THERMISTOR)
1. Connect a test lamp (12V – 3.4W) to the fuel gauge
unit connector terminal and apply the battery voltage.
2. Condition is good if lamp goes off when the thermistor
is immersed in water and goes on when it is taken out
of water.
ENGINE COOLANT TEMPERATURE GAUGE SIMPLE CHECK
Remove the engine coolant tempara-
ture gauge unit connector.
Connect a test lamp (12 V – 3.4 W)
between the harness side connector
and the earth.
When the ignition switch is turned to
ON, the test lamp illuminates.OKThe needle of the engine coolant tem-
perature gauge moves.NGReplace the engine coolant tempera-
ture gauge.
OK
Replace the engine coolant tempera-
ture gauge unit.
NG
Repair the harness.
Point F
Point E
A
B Stopper
Stopper
Test lamp
(12V – 3.4 W)
Earth
Thermistor
Thermistor
Lamp goes on
Lamp goes off