Mitsubishi Lancer Evolution IX. Manual — part 474

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-371

STEP 22. Check harness between B-103 (terminal
No. 3) ignition coil connector and C-121 (terminal
No. 12) engine-ECU connector, also between
B-114 (terminal No. 3) ignition coil connector and
C-121 (terminal No. 11) engine-ECU connector.

• Check output line for damage.

Q: Is the check result normal?

YES :

Go to Step 17 .

NO :

Repair the damaged harness wire.

AK305047

1

2

3

Connector : B-103, B-114

B-114(GR)

B-103(GR)

AB

Harness side
connector

AK502033

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

C-121 (GR)

AB

Connector: C-121

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-372

DATA LIST REFERENCE TABLE

M1131152002117

Item
No.

Inspection
item

Inspection condition

Normal condition

Inspection
procedure
No.

Reference
page

11

Oxygen
sensor

Engine: After
warm-up (leaner by
deceleration, richer
by acceleration)

Excessive deceleration
from 4,000 r/min

200 mV or less

Code No.
P0130

P.13A-7
5

At excessive
acceleration

600

− 1,000 mV

Engine: After
warm-up (using
oxygen sensor,
check air-fuel ratio
as well as control
status by
engine-ECU.

Idle operation

400 mV or less
⇔ 600 − 1,000
mV (altered)

2,500 r/min

12

Air flow
sensor *

1

• Engine coolant

temperature: 80
−95°C

• Lamps, electric

cooling fan and
all accessories:
OFF

• Transmission:

Neutral

Idle operation

17

− 43 Hz

−

−

2,500 r/min

40

− 100 Hz

Acceleration

According to
acceleration,
frequency is
amplified.

13

Intake air
temperature
sensor

Ignition switch:
"ON" or engine
running

Intake air temperature:
−20°C

−20°C

Code No.
P0110

P.13A-4
5

Intake air temperature:
0

°C

0

°C

Intake air temperature:
20

°C

20

°C

Intake air temperature:
40

°C

40

°C

Intake air temperature:
80

°C

80

° C

14

Throttle
position
sensor

Ignition switch:
"ON"

Release accelerator
pedal fully

535

− 735 mV

Code No.
P0120

P.13A-6
0

Depress accelerator
pedal gradually

Increased
according to
accelerator pedal
stroke

Depress accelerator
pedal fully

4,500

− 5,000

mV

16

Power
supply
voltage

Ignition switch: "ON"

System voltage

Procedure
No. 23

P.13A-3
02

18

Cranking
signal
(ignition
switch-ST)

Ignition switch:
"ON"

Engine: Stopped

OFF

Procedure
No. 23

P.13A-3
02

Engine: Cranking

ON

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-373

21

Engine
coolant
temperature
sensor

Ignition switch:
"ON" or engine
running

Coolant temperature:
−20°C

−20°C

Code No.
P0115

P.13A-5
2

Coolant temperature:
0

°C

0

°C

Coolant temperature:
20

°C

20

°C

Coolant temperature:
40

°C

40

°C

Coolant temperature:
80

°C

80

°C

22

Crank angle
sensor

• Engine:

Cranking

• Tachometer:

Connected

Compare engine speed
on tachometer with the
value displayed on
M.U.T.-II/III

Matched

−

−

Engine: Idle
operation

Coolant temperature:
−20°C

1,200

− 1,400

r/min

Coolant temperature:
0

°C

1,200

− 1,400

r/min

Coolant temperature:
20

°C

1,200

− 1,400

r/min

Coolant temperature:
40

°C

1,050

− 1,250

r/min

Coolant temperature:
80

°C

750

− 950 r/min

25

Barometric
pressure
sensor

Ignition switch:
"ON"

Altitude: 0 m

101 kPa

Code
No.P0105

P.13A-3
5

Altitude: 600 m

95 kPa

Altitude: 1,200 m

88 kPa

Altitude: 1,800 m

81 kPa

27

Power
steering fluid
pressure
switch

Engine: Idle
operation

Steering wheel: Not
operated

OFF

Code
No.P0551

P.13A-1
97

Steering wheel:
Operated

ON

28

A/C switch

Engine: Idle

AC switch: OFF

OFF

Procedure
No. 27

P.13A-3
41

AC
switch:
ON

A/C
compressor is
not driven

OFF

A/C
compressor is
driven

ON

34

Air flow
sensor reset
signal

Engine: After
engine warm-up

Idle operation

ON

Code No.
P0100

P.13A-2
4

3,000 r/min

OFF

Item
No.

Inspection
item

Inspection condition

Normal condition

Inspection
procedure
No.

Reference
page

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-374

37

Volumetric
efficiency

• Engine coolant

temperature: 80
−95°C

• Lamps, electric

cooling fan and
all accessories:
OFF

Idle operation

15

− 35%

−

−

2,500 r/min

15

− 35%

Excessive acceleration

According to
acceleration,
volumetric
efficiency is
increased.

41

Injectors *

2

Engine: Cranking

Coolant temperature:
0

°C (all cylinders in

simultaneous injecting
operation)

18

− 307 ms

−

−

Coolant temperature:
20

°C

7.0

− 12 ms

Coolant temperature:
80

°C

2.9

− 4.9 ms

Injectors *

3

• Engine coolant

temperature: 80
−95°C

• Lamps, electric

cooling fan and
all accessories:
OFF

• Transmission:

Neutral

Idle operation

1.5

− 2.7 ms

2,500 r/min

1.2

− 2.4 ms

Excessive acceleration

Increased

44

Ignition
advance

• Engine: After

warm-up

• Install timing

light (for use to
measure actual
ignition timing)

Idle operation

0

− 10° BTDC

−

−

2,500 r/m

20

− 40° BTDC

45

Idle speed
control
(stepper
motor) servo
position *

4

• Engine coolant

temperature: 80
−95°C

• Lighting, electric

cooling fan and
accessories:
OFF

• Transmission:

Neutral

• Engine: Idle

operation (When
A/C switch is
ON, A/C
compressor
must be ON)

A/C switch: OFF

2

− 25 steps

−

−

A/C switch: OFF

→ ON Increased 10 −

70 steps

Item
No.

Inspection
item

Inspection condition

Normal condition

Inspection
procedure
No.

Reference
page