Mitsubishi Lancer Evolution VI. Manual - part 44

MPI  – 

Troubleshooting

13-64

Terminal
No.

Normal condition

Check condition (Engine condition)

Check item

20

Radiator fan motor
relay (HI) 
<EVOLUTION VI>

Radiator fan not operating (coolant temperature:
95

_

C or below)

System voltage

<EVOLUTION-VI>

Radiator fan at high speed (coolant temperature:
105

_

C or above)

0 – 3 V

21

Fan motor relay (LOW)
<EVOLUTION-IV, V>

Fan not operating (coolant temperature: 95

_

C or

below)

System voltage

Fan at low speed (coolant temperature: 95 – 100

_

C)

0 – 3 V

21

Radiator fan motor
relay (LOW) 
<EVOLUTION VI>

Radiator fan not operating (coolant temperature:
95

_

C or below)

System voltage

<EVOLUTION-VI>

Radiator fan at low speed (coolant temperature: 95
– 105

_

C)

0 – 3 V

22

A/C relay

D

Engine: Idling

D

A/C switch: OFF to ON (Compressor is being
driven.)

System voltage, or 6
V or more instanta-
neously to 0 – 3 V

32

A/C condenser fan
motor relay (HI) 
<EVOLUTION VI>

A/C condenser fan not operating (A/C switch: ON,
coolant temperature: 105

_

C or below)

System voltage

<EVOLUTION-VI>

A/C condenser fan at high speed (A/C switch: ON,
coolant temperature: 105

_

C or above)

0 – 3 V

33

Alternator G terminal

D

Engine: Warm, idle (radiator fan: OFF)

D

Headlamp: OFF to ON

D

Brake lamp: OFF to ON

D

Rear defogger switch: OFF to ON

Voltage rises by 0.2 –
3.5 V.

34

A/C condenser fan
motor relay (LOW) 
<EVOLUTION VI>

A/C condenser fan not operating (A/C switch: OFF,
coolant temperature: 105

_

C or below)

System voltage

<EVOLUTION-VI>

A/C condenser fan at low speed (A/C switch: OFF,
coolant temperature: 105

_

C or above)

0 – 3 V

36

Engine warning lamp

Ignition switch: OFF 

→

 ON

0 – 3 V 

→

 System

voltage (After several
seconds have
elapsed)

37

Power steering fluid
pressure switch

Engine: Idling after
warming up

When steering wheel is
stationary

System voltage

When steering wheel is
turned

0 – 3 V

38

Control relay

Ignition switch: OFF

System voltage

Ignition switch: ON

0 – 3 V

39

Fuel pump relay No.2

While engine is idling, suddenly depress the
accelerator pedal.

Momentarily rises
slightly from 0 to 3 V.

40

Exhaust temperature
warning lamp

Ignition switch: OFF to ON

0 – 3 V to system
voltage (After several
seconds have
elapsed)

MPI  – 

Troubleshooting

13-65

Terminal
No.

Normal condition

Check condition (Engine condition)

Check item

41

Alternator FR terminal

D

Engine: Warm, idle (radiator fan: OFF)

D

Headlamp: OFF to ON

D

Brake lamp: OFF to ON

D

Rear defogger switch: OFF to ON

Voltage drops by 0.2 –
3.5 V.

45

A/C switch

Engine: Idle speed

Turn the A/C switch OFF

0 – 3 V

Turn the A/C switch ON
(A/C compressor is oper-
ating)

System voltage

60

Oxygen sensor heater
<EVOLUTION V VI>

Engine: Idling

0 – 3 V

<EVOLUTION-V, VI>

Engine speed: 5,000 r/min

System voltage

71

Ignition switch-ST

Engine: Cranking

8 V or more

72

Intake air temperature
sensor

Ignition switch: ON

When intake air tempera-
ture is 0

_

C

3.2 – 3.8 V

When intake air tempera-
ture is 20

_

C

2.3 – 2.9 V

When intake air tempera-
ture is 40

_

C

1.5 – 2.1 V

When intake air tempera-
ture is 80

_

C

0.4 – 1.0 V

76

Oxygen sensor

Engine: Running at 2,000 r/min after having been
warmed up (Check using a digital type voltmeter)

0 

↔

 0.8 V 

(Changes repeatedly)

80

Backup power supply

Ignition switch: OFF

System voltage

81

Sensor impressed
voltage

Ignition switch: ON

4.5 – 5.5 V

82

Ignition switch-IG

Ignition switch: ON

System voltage

83

Engine coolant
temperature sensor

Ignition switch: ON

When engine coolant
temperature is 0

_

C

3.2 – 3.8 V

When engine coolant
temperature is 20

_

C

2.3 – 2.9 V

When engine coolant
temperature is 40

_

C

1.3 – 1.9 V

When engine coolant
temperature is 80

_

C

0.3 – 0.9 V

84

Throttle position sensor

Ignition switch: ON

Set throttle valve to idle
position

0.3 – 1.0 V

Fully open throttle valve

4.5 – 5.5 V

85

Barometric pressure
sensor

Ignition switch: ON

When altitude is 0 m

3.7 – 4.3 V

sensor

When altitude is 1,200 m

3.2 – 3.8 V

86

Vehicle speed sensor

D

Ignition switch: ON

D

Move the vehicle slowly forward

0 

↔

 5 V

(Changes repeatedly)

MPI  – 

Troubleshooting

13-66

Terminal
No.

Normal condition

Check condition (Engine condition)

Check item

87

Idle position switch

Ignition switch: ON

Set throttle valve to idle
position

0 – 1 V

Slightly open throttle
valve

4 V or more

88

Camshaft position
sensor

Engine: Cranking

0.4 – 3.0 V

sensor

Engine: Idle speed

0.5 – 2.0 V

89

Crank angle sensor

Engine: Cranking

0.4 – 4.0 V

Engine: Idle speed

1.5 – 2.5 V

90

Air flow sensor

Engine: Idle speed

2.2 – 3.2 V

Engine speed: 2,000 r/min

MPI  – 

Troubleshooting

13-67

RESISTANCE AND CONTINUITY BETWEEN HARNESS SIDE CONNECTORS AND TERMINALS

Engine-ECU Harness Side Connector Terminal Arrangement

Terminal No.

Inspection item

Normal condition (Check condition)

1 – 12

No.1 injector

2 – 3 

Ω

 (At 20

_

C)

14 – 12

No.2 injector

2 – 12

No.3 injector

15 – 12

No.4 injector

3 – 12

Fuel pressure control valve

28 – 36 

Ω

 (At 20

_

C)

4 – 12

Stepper motor coil (A1)

28 – 33 

Ω

 (At 20

_

C)

17 – 12

Stepper motor coil (A2)

5 – 12

Stepper motor coil (B1)

18 – 12

Stepper motor coil (B2)

6 – 12

Secondary air control solenoid valve

28 – 36 

Ω

 (At 20

_

C)

11 – 12

Wastegate solenoid valve

62 – 74 

Ω

 (At 20

_

C)

60 – 12

Oxygen sensor heater 
<EVOLUTION-V, VI>

11 – 18 

Ω

 (at 20

_

C)

13 – Body earth

Engine-ECU earth

Continuity established (0 

Ω

)

26 – Body earth

72 – 92

Intake air temperature sensor

5.3 – 6.7 k

Ω

 (When intake air temperature is 0

_

C)

2.3 – 3.0 k

Ω

 (When intake air temperature is 20

_

C)

1.0 – 1.5 k

Ω

 (When intake air temperature is 40

_

C)

0.30 – 0.42 k

Ω

 (When intake air temperature is 80

_

C)

74 – 77

High temperature sensor

3 

Ω

 or less

83 – 92

Engine coolant temperature sensor

5.1 – 6.5 k

Ω

 (When coolant temperature is 0

_

C)

2.1 – 2.7 k

Ω

 (When coolant temperature is 20

_

C)

0.9 – 1.3 k

Ω

 (When coolant temperature is 40

_

C)

0.26 – 0.36 k

Ω

 (When coolant temperature is 80

_

C)

87 – 92

Idle position switch

Continuity established (when throttle valve is at idle
position)

No continuity (when throttle valve is slightly open)

91 – Body earth

–

Continuity established