Content .. 172 173 174 175 ..

Mitsubishi Lancer Evolution 8. Manual - part 174

MPI – TROUBLESHOOTING

13A-82

Checking Procedure 36

Check for broken intercooler
water spray light bulb (ref.
Chapter 54 – Combi. Meter)

Check intercooler water spray
light coming on
• Undo engine ECU connector C-

51, and earth 90 terminal

• Ignition switch: ON
OK: Intercooler water spray light

comes on

C-106 Combi. meter connector
measurement
• Undo connector, then take

measurement on harness side

• Ignition switch: ON
• Voltage across 9 – earth
OK: Battery voltage

C-51 Engine ECU connector
measurement
• Undo connector, then take

measurement on harness side

• Ignition switch: ON
• Voltage across 90 – earth
OK: Battery voltage

Check connectors C-212,
C-210, C-201, C-106

Check and repair harness
between combi. meter and
ignition switch
• Check to see if power supply

cable is damaged

Check connectors C-108, C-22,
C-51

Check and repair harness
between combi. meter and engine
ECU
• Check to see if signal wire is

damaged

Replace intercooler water spray
light

Checking procedure 35:
Intercooler water spray circuit
system check (ref. P.13A-80)

Check connectors C-212,
C-210, C-201

Check harness between combi.
meter and ignition switch
• Check to see if power supply

cable is broken or has a short
circuit

Replace ignition switch

Check connectors C-22, C-108

Check and repair harness
between combi. meter and engine
ECU
• Check to see if signal wire is

broken or has a short circuit

Intercooler Water Spray Light System

Probable causes

The engine ECU turns the intercooler water spray switch light
on when the intercooler water spray switch (auto) is ON.

• Intercooler water spray bulb breaking
• Ignition switch malfunction
• Intercooler water spray light circuit broken, has a short

circuit, or poor connector contact

• Intercooler water spray switch circuit broken, has a short

circuit, or poor connector contact

• Engine ECU malfunction

Repair

MPI – TROUBLESHOOTING

13A-83

6. SERVICE DATA TABLE

Remarks
* When vehicle is new (about 500km or less), the air flow sensor output frequency may be about 10% high

Item
No.

Check Items

Checking Conditions

Normal
condition

Code No. or
Checking
Procedure No.

Page

When
decelerating
rapidly from
4,000rpm

200mV or
less

Engine warm (lean by
decelerating, rich by
racing)

During harsh
racing

600 to
1,000 mV

Idle running

sensor

Engine warm
(Using O

sensor signal,

as well as checking
air/fuel ratio, control
status is checked by
ECU

2,500rpm

400mV or
less

↔

600 to

1,000mV
(changes)

Code No. P0130

13A-16

Idle running

17 to 43Hz

2,500rpm

40 to
100Hz

Air flow
sensor *

•

Engine cooling

water temp: 80 to 95ºC

•

Lights/ignition

devices, electric cooling
fans, ancillary devices:
OFF

•

Transmission in

Neutral

Racing

Frequency
will
increase in
response to
racing

When intake air
temp. is -20ºC

-20ºC

When intake air
temp. is 0ºC

0ºC

When intake air
temp. is 20ºC

20ºC

When intake air
temp. is 40ºC

40ºC

Intake air
temperature
sensor

Ignition switch: ON or
engine running

When intake air
temp. is 80ºC

80ºC

Code No. P0110

13A-10

In idle position

535 to
735mV

Gradually open

Increases
as valve
opens

Throttle
position
sensor

Ignition switch: ON

Fully open

4,500 to
5,000mV

Code No.P0120

13A-13

Battery
voltage

Ignition switch: ON

Battery
voltage

Procedure No.
22

13A-61

Engine: stopped

OFF

Cranking
signal
(ignition
switch – ST)

Ignition switch: ON

Engine: cranking

Procedure
No.22

13A-61

MPI – TROUBLESHOOTING

13A-84

Item
No.

Check Items

Checking Conditions

Normal
condition

Code No. or
Checking
Procedure
No.

Page

When water
temp. is –20ºC

-20ºC

When water
temp. is 0ºC

0ºC

When water
temp. is 20ºC

20ºC

When water
temp. is 40ºC

40ºC

Water temp.
sensor

Ignition switch: ON or
engine running

When water
temp. is 80ºC

80ºC

Code No.
P0115

13A-11

•

Engine cranking

•

Engine speed meter:

Connected

Compare
engine speeds
from engine
speed meter
and MUT-II

Same

When water
temp. is –20ºC

1,300 to
1,500rpm

When water
temp. is 0ºC

1,300 to
1,500rpm

When water
temp. is 20ºC

1,300 to
1,500rpm

When water
temp. is 40ºC

1,150 to
1,350rpm

Crank angle
sensor

Engine: idling

When water
temp. is 80ºC

600 to 900rpm

Altitude: 0m

101kPa

Altitude: 600m

95kPa

Altitude:
1200m

88kPa

Atmospheric
air pressure

Ignition switch: ON

Altitude:
1800m

81kPa

Code
No.P0105

13A-8

Steering wheel
not moving

OFF

Power
steering
fluid
pressure
switch

Engine: idling

Steering wheel
turning

Procedure
No.29

13A-74

A/C switch:
OFF

OFF

A/C switch

Engine: idling
(when A/C switch is ON,
the compressor should
be running

A/C switch: ON

Procedure
No.26

13A-70

Idling

Air flow
sensor reset
signal

Engine: warmed up

3,000rpm

OFF

Code
No.P0100

13A-6

Idling

15 to35%

2,500rpm

15 to 35%

Volumetric
efficiency

•

Engine cooling

water: 85 to 95ºC

•

Lights/ignition

devices, electric cooling
fans, ancillary devices:
OFF

Harsh racing

Volumetric
efficiency will
increase in
response to
racing

MPI – TROUBLESHOOTING

13A-85

Item
No.

Check Items

Checking Conditions

Normal
condition

Code No. or
Checking
Procedure
No.

Page

When water
temperature 0ºC
(all cylinders
injecting
simultaneously)

25 to 37ms

When water
temperature 20ºC

15 to 22ms

Injector
operating
time *1

Engine: cranking

When water
temp. 80ºC

4.2 to 6.3ms

Idle running

1.5 to 2.7ms

2,500rpm

1.2 to 2.4ms

Injector
operating
time *2

•

Engine: Cooling

water temp. 80 to 95ºC

•

Lights/ignition

devices, electric cooling
fans, ancillary devices:
OFF

•

Transmission:

Neutral

During harsh
racing

Increases

Idle running

0 to 13ºC
BTDC

Ignition
advance

•

After engine has

warmed up

•

Set timing light (Set

timing light for firing on
actual ignition timing)

2,500rpm

20 to
40ºBTDC

A/C switch: OFF

2 to 25 STEP

ISC (servo)
position *3

•

Engine: Cooling

water temp. 80 to 90ºC

•

Lights/ignition

devices, electric cooling
fans, ancillary devices:
OFF

•

Transmission:

Neutral

•

Engine: idle running

(when A/C switch ON,
compressor is
operated)

A/C switch
OFF

→

10 to 70 step
increase

A/C switch: OFF

OFF
(compressor
clutch not
operating)

A/C relay

Engine: after warming
up, idle running

A/C switch: ON

On
(compressor
clutch
operating)

Procedure
No.27

13A-71

Content .. 172 173 174 175 ..