Mitsubishi Lancer Evolution VI. Manual - part 42

 

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Mitsubishi Lancer Evolution VI. Manual - part 42

 

 

MPI  – 

Troubleshooting

13-56

DATA LIST REFERENCE TABLE

Item
No.

Inspection
item

Inspection contents

Normal condition

Inspection
procedure
No.

Reference
page

11

Oxygen
sensor

Engine:After having 

warmed up

Air/fuel mixture is 
made leaner when de-

When at 4,000 r/min,
engine is suddenly 
decelerated

200 mV or less

Procedure
No. 31

13-42

made leaner when de-
celerating, and is made
richer when racing.

When engine is 
suddenly raced

600 – 1,000 mV

Engine:After having 

warmed up

The oxygen sensor 
signal is used to check

Engine is idling

400 mV or less

   (Changes)

signal is used to check
the air/fuel mixture 
ratio, and control 
condition is also 
checked by the ECU.

2,500 r/min

600 – 1,000 mV

12

Air flow 
sensor* 

D

Engine coolant 
temperature: 80 –

Engine is idling

17 – 43 Hz

–

–

sensor  
<EVOLU-
TION-IV>

temperature:  80 
95

_

C

D

Lamps, electric

li

f

d ll

2,500 r/min

46 – 86 Hz

p

cooling fan and all
accessories: OFF

D

Transmission:
Neutral (A/T: 
P range)

Engine is raced

Frequency 
increases in 
response to 
racing

12

Air flow 
sensor* 

D

Engine coolant 
temperature: 80 –

Engine is idling

12 – 38 Hz

–

–

sensor  
<EVOLU-
TION-V, VI>

temperature:  80 
95

_

C

D

Lamps, electric

li

f

d ll

2,500 r/min

36 – 76 Hz

p

cooling fan and all
accessories: OFF

D

Transmission:
Neutral (A/T: 
P range)

Engine is raced

Frequency 
increases in 
response to 
racing

13

Intake air 
temperature
sensor

Ignition switch: ON or
with engine running

When intake air 
temperature is –20

_

C

–20

_

C

Code No.
13

13-9

sensor

When intake air 
temperature is 0

_

C

0

_

C

When intake air 
temperature is 20

_

C

20

_

C

When intake air 
temperature is 40

_

C

40

_

C

When intake air 
temperature is 80

_

C

80

_

C

NOTE
*:

In a new vehicle [driven approximately 500 km or less], the air flow sensor output frequency is sometimes
10% higher than the standard frequency.

MPI  – 

Troubleshooting

13-57

Item
No.

Inspection
item

Inspection contents

Normal condition

Inspection
procedure
No.

Reference
page

14

Throttle
position

Ignition switch: ON

Set to idle position

300 – 1,000 mV

Code No.
14

13-9

position
sensor

Gradually open

Increases in 
proportion to 
throttle opening 
angle

14

Open fully

4,500 – 5,500 mV

16

Power 
supply 
voltage

Ignition switch: ON

System voltage

Procedure
No. 24

13-35

18

Cranking
signal 

Ignition switch: ON

Engine: Stopped

OFF

Procedure
No. 27

13-38

g

(ignition
switch-ST)

Engine: Cranking

ON

21

Engine 
coolant 
temperature
sensor

Ignition switch: ON or
with engine running

When engine 
coolant temperature
is –20

_

C

–20

_

C

Code No.
21

13-10

sensor

When engine 
coolant temperature
is 0

_

C

0

_

C

When engine 
coolant temperature
is 20

_

C

20

_

C

When engine 
coolant temperature
is 40

_

C

40

_

C

When engine 
coolant temperature
is 80

_

C

80

_

C

MPI  – 

Troubleshooting

13-58

Item
No.

Reference
page

Inspection
procedure
No.

Normal condition

Inspection contents

Inspection
item

22

Crank angle
sensor

D

Engine: Cranking

D

Tachometer: 
Connected

Compare the engine
speed readings on
the tachometer and
the MUT-

II

.

Accord

–

–

D

Engine: Idling

D

Idle position 
switch: ON

When engine 
coolant temperature
is –20

_

C

1,300 – 1,500 rpm

When engine 
coolant temperature
is 0

_

C

1,300 – 1,500 rpm

When engine 
coolant temperature
is 20

_

C

1,300 – 1,500 rpm

When engine 
coolant temperature
is 40

_

C

1,150 – 1,350 rpm

When engine 
coolant temperature
is 80

_

C

750 – 950 rpm

25

Barometric
pressure

Ignition switch: ON

At altitude of 0 m

101 kPa

Code No. 
25

13-14

pressure
sensor

At altitude of 600 m

95 kPa

25

At altitude of 1,200 m

88 kPa

At altitude of 1,800 m

81 kPa

26

Idle position
switch

Ignition switch: ON 
Check by operating 
accelerator pedal

Throttle valve: 
Set to idle position

ON

Procedure
No. 26

13-38

accelerator pedal 
repeatedly.)

Throttle valve: 
Slightly open

OFF*

27

Power 
steering fluid
pressure

Engine: Idling

Steering wheel 
stationary

OFF

Procedure
No. 28

13-39

pressure
switch

Steering wheel 
turning

ON

28

A/C switch

Engine: Idling 
(when A/C switch is

A/C switch: OFF

OFF

Procedure
No. 29

13-39

(

C

tc

ON, A/C compressor
should be operating.)

A/C switch: ON

ON

NOTE
*:

The idle position switch normally turns off when the voltage of the throttle position sensor is 50 –
100 mV higher than the voltage at the idle position. If the throttle position switch turns back on
after the throttle valve has opened, the idle position switch and the throttle position sensor need
to be adjusted.

MPI  – 

Troubleshooting

13-59

Item
No.

Inspection
item

Inspection contents

Normal condition

Inspection
procedure
No.

Reference
page

41

Injectors*

1

 

<EVOLU-
TION-IV>

Engine: Cranking

When engine 
coolant temperature
is 0

_

C (injection is 

carried out for all 
cylinders 
simultaneously)

27 – 41 ms

–

–

When engine 
coolant temperature
is 20

_

C

14 – 22 ms

When engine 
coolant temperature
is 80

_

C

3.9 – 5.9 ms

Injectors*

2

 

<EVOLU-
TION-IV>

D

Engine coolant 
temperature:
80–95

_

C

Engine is idling

1.2 – 2.4 ms

TION-IV>

80–95

_

C

D

Lamps, electric
cooling fan and all
accessories: OFF

2,500 r/min

1.0 – 2.2 ms

accessories:  OFF

D

Transmission:
Neutral (A/T : 
P range)

When engine is 
suddenly raced

Increases

41

Injectors*

1

 

<EVOLU-
TION-V, VI>

Engine: Cranking

When engine 
coolant temperature
is 0

_

C

27 – 40 ms

–

–

When engine 
coolant temperature
is 20

_

C

14.5 – 21.7 ms

When engine 
coolant temperature
is 80

_

C

3.8 – 5.6 ms

Injectors*

2

 

<EVOLU-
TION-V VI>

D

Engine coolant 
temperature:
80–95

_

C

Engine is idling

0.9 – 2.1 ms

TION-V, VI>

80–95

_

C

D

Lamps, electric
cooling fan and all
accessories: OFF

2,500 r/min

0.7 – 1.9 ms

accessories:  OFF

D

Transmission:
Neutral (A/T : 
P range)

When engine is 
suddenly raced

Increases

NOTE
*

1

: The injector drive time represents the time when the cranking speed is at 250 r/min or below when

the power supply voltage is 11 V.

*

2

: In a new vehicle [driven approximately 500 km or less], the injector drive time is sometimes 10%

longer than the standard time.

 

 

 

 

 

 

 

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