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
OK
OK
NG
NG
OK
NG
NG
NG
OK
OK
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
Repair
Repair
Repair
Repair
Repair
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
11
O
2
sensor
Engine warm
(Using O
2
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
12
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
13
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
14
Throttle
position
sensor
Ignition switch: ON
Fully open
4,500 to
5,000mV
Code No.P0120
13A-13
16
Battery
voltage
Ignition switch: ON
Battery
voltage
Procedure No.
22
13A-61
Engine: stopped
OFF
18
Cranking
signal
(ignition
switch – ST)
Ignition switch: ON
Engine: cranking
ON
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
21
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
22
Crank angle
sensor
Engine: idling
When water
temp. is 80ºC
600 to 900rpm
-
-
Altitude: 0m
101kPa
Altitude: 600m
95kPa
Altitude:
1200m
88kPa
25
Atmospheric
air pressure
Ignition switch: ON
Altitude:
1800m
81kPa
Code
No.P0105
13A-8
Steering wheel
not moving
OFF
27
Power
steering
fluid
pressure
switch
Engine: idling
Steering wheel
turning
ON
Procedure
No.29
13A-74
A/C switch:
OFF
OFF
28
A/C switch
Engine: idling
(when A/C switch is ON,
the compressor should
be running
A/C switch: ON
ON
Procedure
No.26
13A-70
Idling
ON
34
Air flow
sensor reset
signal
Engine: warmed up
3,000rpm
OFF
Code
No.P0100
13A-6
Idling
15 to35%
2,500rpm
15 to 35%
37
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
41
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
44
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
45
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
→
ON
10 to 70 step
increase
-
-
A/C switch: OFF
OFF
(compressor
clutch not
operating)
49
A/C relay
Engine: after warming
up, idle running
A/C switch: ON
On
(compressor
clutch
operating)
Procedure
No.27
13A-71
ON
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