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
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