Mitsubishi Lancer Evolution X. Manual — part 444

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-841

CHECK AT THE ENGINE CONTROL MODULE (ECM)

M1131153501435

1. Disconnect the ECM connectors B-09 and B-10,

and connect check harness special tool
MB992110 between the ECM connectors.

2. Measure the voltage between each check

harness connector terminal and check harness
connector ground terminal (No. 81 or No. 93).

Injector
stop

1

Injectors

Specified
injector is
stopped.

Engine: warm
up, idle (cut the
fuel supply to
each injector in
turn and check
cylinders which
don't affect
idling.)

Idle
condition is
changed by
stopping
selected
cylinder:
this can
cause an
unstable
condition
and the
engine may
stall.

Code No.
P0201,
Code No.
P0202,
Code No.
P0203,
Code No.
P0204

P.13A-298

,

P.13A-308

,

P.13A-318

,

P.13A-328

Oil control
valve

17

Intake engine
oil control
valve, exhaust
engine oil
control valve

Switch the
intake
engine oil
control
valve and
exhaust
engine oil
control
valve from
OFF to ON.

Ignition switch:
"ON"

When the
valve is
actuated,
operating
noise is
audible.

Code No.
P0010,
P0013

P.13A-56

,

P.13A-67

Waste gate
solenoid
valve

20

Turbocharger
wastegate
solenoid 1,
turbocharger
wastegate
solenoid 2

Solenoid
valve turns
from OFF
to ON.

Ignition switch:
"ON"

Clicks
when
solenoid
valve is
driven.

Code No.
P0243,
P0247

P.13A-352

,

P.13A-359

M.U.T.-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

DRIVE
CONTENTS

INSPECTION
REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-842

TERMINAL VOLTAGE CHECK CHART

NOTE: *

1

: The average voltage through an analog voltmeter is described in this service manual (because the

average voltage would be not constantly shown on a digital voltmeter).
NOTE: *

2

: Vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF"

position but is no problem for checks.

AK604559

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

Check harness special tool MB992110 connector terminal arrangement

AD

TERMINAL
NO.

INSPECTION ITEM INSPECTION CONDITION (ENGINE

CONDITION)

NORMAL
CONDITION

1

Intake engine oil
control valve

Ignition switch: "ON"

B+

Engine: Warming up, under the high load
operation.

4 − 10 V

*1

2

No. 1 injector

Engine: While engine is idling after having
warmed up, suddenly depress the accelerator
pedal.

From 9 − 15 V*

1

, it

is slightly reduced
temporarily.

3

No. 2 injector

18

No. 3 injector

19

No. 4 injector

4

Ignition coil No. 1
(ignition power
transistor

Engine: 3,000 r/min

0.1 − 2.0 V*

1

5

Ignition coil No. 2
(ignition power
transistor

20

Ignition coil No. 3
(ignition power
transistor

21

Ignition coil No. 4
(ignition power
transistor

6

Starter active signal Engine: cranking

B+

Engine: idling

1 V or less

7

Exhaust camshaft
position sensor

Engine: cranking

2.0 − 4.8 V*

1

Engine: idling

2.0 − 3.0 V*

1

8

Crankshaft position
sensor

Engine: cranking

0.4 − 4.0 V*

1

Engine: idling

2.0 − 3.0 V*

1

9

Sensor supplied
voltage

Ignition switch: "ON"

4.9 − 5.1 V

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-843

10

Throttle position
sensor (main)

• Remove the

intake air hose
at the throttle
body

• Disconnect the

throttle position
sensor
connector, and
then connect
terminal
numbers No. 3,
No. 4, No. 5
and No. 6 with
the use of the
special tool:
MB991658.

• Ignition switch:

"ON"

Fully close the throttle valve
with your finger

0.3 − 0.7 V

Fully open the throttle valve
with your finger

4.0 V or more

11

Throttle position
sensor (sub)

• Remove the

intake air hose
at the throttle
body

• Disconnect the

throttle position
sensor
connector, and
then connect
terminal
numbers No. 3,
No. 4, No. 5
and No. 6 with
the use of the
special tool:
MB991658.

• Ignition switch:

"ON"

Fully close the throttle valve
with your finger

4.0 V or more

Fully open the throttle valve
with your finger

1.0 V or less

12

Power supply
voltage applied to
throttle position
sensor

Ignition switch: "ON"

4.9 − 5.1 V

14

Intake camshaft
position sensor

Engine: cranking

2.0 − 4.8 V*

1

Engine: idling

2.0 − 3.0 V*

1

15

Throttle actuator
control motor (+)

• Ignition switch: "ON"
• Accelerator pedal: fully opened → fully closed

Decreases slightly
(Approximately 2
V) from battery
voltage.

TERMINAL
NO.

INSPECTION ITEM INSPECTION CONDITION (ENGINE

CONDITION)

NORMAL
CONDITION

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-844

16

Throttle actuator
control motor (−)

• Ignition switch: "ON"
• Accelerator pedal: fully closed → fully opened

Decreases slightly
(Approximately 2
V) from battery
voltage.

17

Exhaust engine oil
control valve

Ignition switch: "ON"

B+

Engine: Warming up, under the high load
operation.

4.0 − 10 V*

1

26

Engine coolant
temperature sensor

Ignition switch:
"ON"

When engine coolant
temperature is −20° C (−4° F)

3.9 − 4.5 V

When engine coolant
temperature is 0° C (32° F)

3.2 − 3.8 V

When engine coolant
temperature is 20° C (68° F)

2.3 − 2.9 V

When engine coolant
temperature is 40° C (104° F)

1.3 − 1.9 V

When engine coolant
temperature is 60° C (140° F)

0.7 − 1.3 V

When engine coolant
temperature is 80° C (176° F)

0.3 − 0.9 V

34

Heated oxygen
sensor (front)
heater

Engine: warming up, idling (20 seconds after
starting engine)

9 − 11 V*

1

Engine: revving

9 − 11 V*

1

→ B+

(momentarily)

35

Heated oxygen
sensor (rear) heater

Engine warming up, idling (20 seconds after
starting engine)

9 − 11 V*

1

Engine: revving

9 − 11 V*

1

→ B+

(momentarily)

36

Engine oil pressure
switch

Ignition switch: "ON"

1 V or less

Engine: idling

B+

37

Evaporative
emission purge
solenoid

Ignition switch: "ON"

B+

Engine: warming up, 3,000 r/min (with 3 minutes
after the engine starting sequence is completed)

Voltage drops

38

Heated oxygen
sensor (front)

Engine: warming up, 2,500 r/min

0.5 ⇔ 1.4 V

(changes
repeatedly)

39

Heated oxygen
sensor (front) offset
voltage

Ignition switch: "ON"

0.4 − 0.6 V

40

Heated oxygen
sensor (rear)

• Transaxlle: 2nd
• Drive with wide open throttle
• Engine: 3,500 r/min or more

1.0 − 1.5 V

41

Heated oxygen
sensor (rear) offset
voltage

Ignition switch: "ON"

0.4 − 0.6 V

TERMINAL
NO.

INSPECTION ITEM INSPECTION CONDITION (ENGINE

CONDITION)

NORMAL
CONDITION