Mitsubishi Lancer Evolution X. Manual — part 445
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-845
44
Power supply
voltage applied to
manifold absolute
pressure sensor
Ignition switch: "ON"
4.9 − 5.1 V
45
Manifold absolute
pressure sensor
Ignition switch:
"ON"
At altitude of 0 m (0 ft.)
1.2 − 1.8 V
At altitude of 600 m (1,969
ft.)
1.1 − 1.7 V
At altitude of 1,200 m (3,937
ft.)
1.0 − 1.6 V
At altitude of 1,800 m (5,906
ft.)
0.9 − 1.5 V
Engine: warming up, idling
0.46 − 0.66 V
When engine is suddenly revved
Voltage varies
51
Fuel pump relay 1
Engine: While engine is idling after having
warmed up, suddenly depress the accelerator
pedal.
From battery
voltage, it is slightly
reduced
temporarily.
52
Turbocharger
wastegate solenoid
1
Engine: Warming
up
Engine is idling
B+
When engine is suddenly
revved
Voltage drops
53
Turbocharger
wastegate solenoid
2
Engine: Warming
up
Engine is idling
B+
4,000 r/min
Voltage drops
58
Power steering
pressure switch
Engine: warming
up, idling
When steering wheel is not
turned
B+
When steering wheel is
turned
1 V or less
60
Generator G
terminal
• Engine: warming up, idling
• Radiator fan: stopped
• Headlight: OFF to ON*
2
• Stop light: OFF to ON
• Rear defogger switch: OFF to ON
Voltage increases
61
Generator FR
terminal
• Engine: warming up, idling
• Radiator fan: stopped
• Headlight: OFF to ON*
2
• Stop light: OFF to ON
• Rear defogger switch: OFF to ON
Voltage drops
62
Generator L
terminal
Ignition switch: "ON"
0.5 − 2.0 V
Engine: idling
B+
72
Power supply
voltage applied to
throttle actuator
control motor
Ignition switch: "ON"
B+
73
MFI relay (power
supply)
Ignition switch: "LOCK" (OFF)
B+
Ignition switch: "ON"
1 V or less
TERMINAL
NO.
INSPECTION ITEM INSPECTION CONDITION (ENGINE
CONDITION)
NORMAL
CONDITION
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-846
74
Accelerator pedal
position sensor
(main)
Ignition switch:
"ON"
Release the accelerator
pedal
0.9 − 1.1 V
Depress the accelerator
pedal fully
4 V or more
75
Power supply
voltage applied to
accelerator pedal
position sensor
(main)
Ignition switch: "ON"
4.9 − 5.1 V
77
Accelerator pedal
position sensor
(sub)
Ignition switch:
"ON"
Release the accelerator
pedal
0.4 − 0.6 V
Depress the accelerator
pedal fully
2 V or more
78
Power supply
voltage applied to
accelerator pedal
position sensor
(sub)
Ignition switch: "ON"
4.9 − 5.1 V
82
Power supply
Ignition switch: "ON"
B+
84
Throttle actuator
control motor relay
Ignition switch: "ON" → "LOCK" (OFF)
1 V or less → B+ →
1 V or less
85
Clutch pedal
position switch
<M/T>
Ignition switch:
"ON"
Release the clutch pedal
10 V or more
Depress the clutch pedal
fully
1 V or less
87
Mass airflow sensor Engine is revved
Voltage increases
in response to
revving
89
Intake air
temperature sensor
1
Ignition switch:
"ON"
When intake air temperature
is − 20° C (− 4° F)
3.8 − 4.4 V
When intake air temperature
is 0° C (32° F)
3.2 − 3.8 V
When intake air temperature
is 20° C (68° F)
2.3 − 2.9 V
When intake air temperature
is 40° C (104° F)
1.5 − 2.1 V
When intake air temperature
is 60° C (140° F)
0.8 − 1.4 V
When intake air temperature
is 80° C (176° F)
0.4 − 1.0 V
92
Ignition switch-IG
Ignition switch: "ON"
B+
96
Fuel pump relay 2
Ignition switch: "ON"
B+
Engine: idling
1.0 V or less
TERMINAL
NO.
INSPECTION ITEM INSPECTION CONDITION (ENGINE
CONDITION)
NORMAL
CONDITION
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-847
98
Intake air
temperature sensor
2
Ignition switch:
"ON"
When intake air temperature
is −20° C (−4° F)
3.8 − 4.4 V
When intake air temperature
is 0° C (32° F)
3.2 − 3.8 V
When intake air temperature
is 20° C (68° F)
2.3 − 2.9 V
When intake air temperature
is 40° C (104° F)
1.5 − 2.1 V
When intake air temperature
is 60° C (140° F)
0.8 − 1.4 V
When intake air temperature
is 80° C (176° F)
0.4 − 1.0 V
102
A/C compressor
clutch relay
• Engine: idling
• A/C switch: OFF → ON (A/C compressor is
operating)
B+ → 1 V or less as
A/C clutch cycles
104
Backup power
supply
Ignition switch: "LOCK" (OFF)
B+
105
Ignition switch-ST
Ignition switch: cranking
8 V or more
106
Starter relay
Engine: cranking
B+
Engine: idling
1 V or less
112
Fuel tank differential
pressure sensor
• Ignition switch: "ON"
• Fuel cap removal
1.5 − 3.5 V
114
Power supply
voltage applied to
fuel tank differential
pressure sensor
Ignition switch: "ON"
4.9 − 5.1 V
115
Fuel tank
temperature sensor
Ignition switch:
"ON"
When fuel tank temperature
is 0° C (32° F)
2.7 − 3.1 V
When fuel tank temperature
is 20° C (68° F)
2.1 − 2.5 V
When fuel tank temperature
is 40° C (104° F)
1.6 − 2.0 V
When fuel tank temperature
is 80° C (176° F)
0.8 − 1.2 V
117
Evaporative
emission ventilation
solenoid
Ignition switch: "ON"
B+
Carry out the actuator test to drive the solenoid
valve.
1 V or less
(Approximately 6
seconds)
TERMINAL
NO.
INSPECTION ITEM INSPECTION CONDITION (ENGINE
CONDITION)
NORMAL
CONDITION
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-848
TERMINAL RESISTANCE AND CONTINUITY CHECK
AK502911
82 81 80 79 78 77 76 75 74 73 72 71
94 93 92 91 90 89 88 87 86 85 84 83
99 98 97 96 95
100
101
102
103
104
105
106
112
113
114
109 108
107
110
111
115
116
117
118
16 15 14 13 12 11 10 9 8 7 6 5 4 3
2
1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
B-09
B-10
AT
Engine-ECU harness side connector
TERMINAL
NO.
INSPECTION ITEM
NORMAL CONDITION (INSPECTION
CONDITION)
1 − 82
Intake engine oil control valve
6.9 − 7.9 Ω [at 20° C (68° F)]
15 − 16
Throttle actuator control motor
0.3 − 80 Ω [at 20° C (68° F)]
17 − 82
Exhaust engine oil control valve
6.9 − 7.9 Ω [at 20° C (68° F)]
26 − 27
Engine coolant temperature sensor
14 − 17 kΩ [when engine coolant temperature is
− 20° C (− 4° F)]
5.1 − 6.5 kΩ [when engine coolant temperature
is 0° C (32° F)]
2.1 − 2.7 kΩ [when engine coolant temperature
is 20° C (68° F)]
0.9 − 1.3 kΩ [when engine coolant temperature
is 40° C (104° F)]
0.48 − 0.68 kΩ [when engine coolant
temperature is 60° C (140° F)]
0.26 − 0.36 kΩ [when engine coolant
temperature is 80° C (176° F)]
34 − 82
Heated oxygen sensor (front) heater
4.5 − 8.0 Ω [at 20° C (68° F)]
35 − 82
Heated oxygen sensor (rear) heater
4.5 − 8.0 Ω [at 20° C (68° F)]
37 − 82
Evaporative emission purge solenoid
22 − 26 Ω [at 20° C (68° F)]
52 − 82
Turbocharger wastegate solenoid 1
29 − 35 Ω [at 20° C (68° F)]
53 − 82
Turbocharger wastegate solenoid 2
29 − 35 Ω [at 20° C (68° F)]
71 − Body
ground
ECM ground
Continuity (2 Ω or less)
81 − Body
ground
83 − Body
ground
93 − Body
ground
82 − 117
Evaporative emission ventilation solenoid
17 − 21 Ω [at 20° C (68° F)]
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