Mitsubishi Lancer Evolution X. Manual - part 439

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-821

APP 
sensor 
(sub)

12

Accelerator 
pedal position 
sensor (sub)

Ignition switch: 
"ON"

Release the 
accelerator 
pedal

400 − 600 mV Code No. 

P2127, 
P2128

P.13A-648

, 

P.13A-653

 

Depress the 
accelerator 
pedal 
gradually

Increases in 
response to 
the pedal 
depression 
stroke

Depress the 
accelerator 
pedal fully

2,000 mV or 
more

APP 
sensor 
(sub)

BF

Accelerator 
pedal position 
sensor (sub)

Ignition switch: 
"ON"

Release the 
accelerator 
pedal

8 − 12 %

Code No. 
P2127, 
P2128

P.13A-648

, 

P.13A-653

Depress the 
accelerator 
pedal 
gradually

Increases in 
response to 
the pedal 
depression 
stroke

Depress the 
accelerator 
pedal fully

40 % or more

Barometri
c 
pressure 
sensor

BB

Barometric 
pressure 
sensor

Ignition switch: 
"ON"

Engine 
stopped [At 
altitude of 0 m 
(0 ft.)]

101 kPa 
(29.8 in.Hg)

Code No. 
P2228, 
P2229

P.13A-673

, 

P.13A-675

Engine 
stopped [At 
altitude of 600 
m (1,969 ft.)]

95 kPa (28.1 
in.Hg)

Engine 
stopped [At 
altitude of 
1,200 m 
(3,937 ft.)]

88 kPa (26.0 
in.Hg)

Engine 
stopped [At 
altitude of 
1,800 m 
(5,906 ft.)]

81 kPa (23.9 
in.Hg)

Brake 
light 
switch

74

Brake light 
switch

Ignition switch: 
"ON"

Depress the 
brake pedal 
fully

ON

−

−

Release the 
brake pedal

OFF

M.U.T.-III 
SCAN 
TOOL 
DISPLAY

ITEM 
NO. 

INSPECTION 
ITEM

INSPECTION REQUIREMENT

NORMAL 
CONDITION

INSPECTION 
PROCEDURE 
NO.

REFERENCE 
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-822

Calculate
d load 
value

73

Calculated 
load value

Engine: 
warming up

Engine is 
idling

20 − 34 %

−

−

2,500 r/min

6 − 13 %

Closed 
throttle 
position 
switch

84

Closed throttle 
position signal

Ignition switch: 
"ON"

Release the 
accelerator 
pedal

ON

−

−

Depress the 
accelerator 
pedal fully

OFF

Cranking 
signal

79

Cranking 
signal (ignition 
switch-ST)

Ignition switch: 
"ON"

Engine: 
stopped

OFF

Procedure 
No. 24 
<M/T>, 25 
<TC-SST>

P.13A-784

 

<M/T>, 

P.13A-796

 

<TC-SST>

Engine: 
cranking

ON

Cranksha
ft position 
sensor

2

Crankshaft 
position 
sensor

• Engine: cranking
• Tachometer: connected

Engine 
speeds 
displayed on 
the scan tool 
and 
tachometer 
are identical.

Code No. 
P0335

P.13A-389

Engine: idling

Engine coolant 
temperature is 
−20° C (−4°  F)

1,300 − 1,500 

r/min

Engine coolant 
temperature is 
0° C (32° F)

1,300 − 1,500 

r/min

Engine coolant 
temperature is 
20° C (68° F)

1,300 − 1,500 

r/min

Engine coolant 
temperature is 
40° C (104° F)

1,200 − 1,400 

r/min

Engine coolant 
temperature is 
80° C (176° F)

600 − 800 

r/min

M.U.T.-III 
SCAN 
TOOL 
DISPLAY

ITEM 
NO. 

INSPECTION 
ITEM

INSPECTION REQUIREMENT

NORMAL 
CONDITION

INSPECTION 
PROCEDURE 
NO.

REFERENCE 
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-823

ECT 
sensor

6

Engine coolant 
temperature 
sensor

Ignition switch: 
"ON" or with 
engine running

Engine coolant 
temperature is 
− 20° C (− 4°  F)

− 20° C (− 4° F) Code No. 

P0116, 
P0117, 
P0118

P.13A-183

, 

P.13A-189

, 

P.13A-194

Engine coolant 
temperature is 
0° C (32° F)

0° C (32° F)

Engine coolant 
temperature is 
20° C (68° F)

20° C (68° F)

Engine coolant 
temperature is 
40° C (104° F)

40° C 

(104° F)

Engine coolant 
temperature is 
80° C (176° F)

 80° C 

(176° F)

Engine 
control 
relay

95

MFI relay

Ignition switch: "ON"

ON

−

−

Engine oil 
pressure 
switch

90

Engine oil 
pressure 
switch

Ignition switch: "ON"

ON

Procedure 
No. 28

P.13A-816

 

Engine is idling

OFF

ETV relay 96

Throttle 
actuator 
control motor 
relay

Ignition switch: "ON"

ON

−

−

EVAP. 
emission 
purge 
SOL. duty

49

Evaporative 
emission 
purge solenoid 
duty

Engine: warming up with Open 
loop drive condition, without 
EVAP leak monitor

1 % or more

−

−

Exhaust 
VVT 
angle 
(bank 1)

39

Exhaust 
MIVEC phase 
angle

Engine: warming up, idle

− 3 to 3° CA 

(ATDC)

Code No. 
P0014

P.13A-73

Engine: warming up, sudden 
revving

Increases 
(retards)

Fan duty 47

Fan motor 
duty

Engine: warming up

• The duty ratio of the fan 

motor driving is shown.

0 − 100 % 

(Display 
range) 

−

−

Fuel level 
gauge

51

Fuel level 
gauge

Ignition switch: "ON" 

• The residual fuel amount 

in the tank is shown.

• "0 %" means "Empty" and 

"100 %" means "Full".

0 − 100 % 

(Display 
range) 

−

−

Fuel 
pump 
relay

97

Fuel pump 
relay

Ignition switch: "ON" 

OFF 

−

−

Engine: cranking 

ON 

M.U.T.-III 
SCAN 
TOOL 
DISPLAY

ITEM 
NO. 

INSPECTION 
ITEM

INSPECTION REQUIREMENT

NORMAL 
CONDITION

INSPECTION 
PROCEDURE 
NO.

REFERENCE 
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-824

Fuel 
system 
status 
(bank 1)

105

Fuel control 
system status

Engine: 
warming up

2,500 r/min 

CL: Using 
O2S

−

−

When engine 
is suddenly 
revved

OL: DRV 
condition

Fuel 
system 
status 
(bank 2)

*5

106

Fuel control 
system status 
(bank 2)

−

−

−

−

Fuel tank 
differentia
l PRS. 
SNSR

52

Fuel tank 
differential 
pressure 
sensor

• Ignition switch: "ON"
• Fuel cap removal

1,500 − 3,500 

mV

−

−

Fuel tank 
temperat
ure 
sensor

53

Fuel tank 
temperature 
sensor

• In cooled state
• Ignition switch: "ON"

Approximatel
y the same 
as the 
outdoor 
temperature 

Code No. 
P0181, 
P0182, 
P0183

P.13A-279

, 

P.13A-286

, 

P.13A-291

Ignition 
switch

85

Ignition switch 
(IG1)

Ignition switch: "ON" 

ON

−

−

M.U.T.-III 
SCAN 
TOOL 
DISPLAY

ITEM 
NO. 

INSPECTION 
ITEM

INSPECTION REQUIREMENT

NORMAL 
CONDITION

INSPECTION 
PROCEDURE 
NO.

REFERENCE 
PAGE