Mitsubishi Lancer Evolution X. Manual - part 247

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-53

SYMPTOM CHART

M1131151503134

CAUTION

During diagnosis, a DTC associated with other systems may be set when the ignition switch is turned 
on with connector(s) disconnected. On completion, confirm all systems for DTC(s). If DTC(s) are set, 
erase them all.

CAUTION

Disconnecting the battery cables or removing the combination meter will erase the learned value of 
the fuel gauge. To recover the learned value, input a vehicle speed (by actually driving the vehicle or 
inputting a simulated vehicle speed), and stop the vehicle. This will complete the learning process.
NOTE: Check that the ECM ground circuit is normal before checking for the cause of the problem.
NOTE: When the racing (2,000 to 5,000 r/min or more) continues on the vehicle stopped with no load during 
the specified time or more, the increase in the engine speed might be limited. This comes from the engine 
protection and control functions and is not a malfunction.

.

TROUBLE SYMPTOMS

INSPECTION 
PROCEDURE

REFERENCE PAGE

Communication 
with scan tool is 
impossible

Communication with ECM only is not possible

1

P.13A-704

Malfunction 
Indicator Lamp 
(SERVICE 
ENGINE SOON or 
Check Engine 
Lamp) and related 
parts

The Malfunction Indicator Lamp (SERVICE 
ENGINE SOON or Check Engine Lamp) does not 
illuminate right after the ignition switch is turned to 
the "ON" position

2

P.13A-708

The Malfunction Indicator Lamp (SERVICE 
ENGINE SOON or Check Engine Lamp) remains 
illuminated and never goes out

3

P.13A-709

Starting

Cranks, won't start

4

P.13A-711

Starts up and dies

5

P.13A-718

Hard starting

6

P.13A-722

Idling stability 
(improper idling)

Unstable idle (rough idle, hunting)

7

P.13A-727

Idle speed is high (improper idle speed)

8

P.13A-730

Idle speed is low (improper idle speed)

9

P.13A-732

Idling stability 
(engine stalls)

When the engine is cold, it stalls at idle (die out)

10

P.13A-733

When the engine is hot, it stalls at idle (die out)

11

P.13A-735

The engine stalls when accelerating (pass out)

12

P.13A-738

The engine stalls when decelerating

13

P.13A-740

Driving

Hesitation, sag, Stumble, Poor acceleration or 
Surge

14

P.13A-742

Acceleration shock

15

P.13A-745

Knocking

16

P.13A-747

Too high CO and HC concentration when idling

17

P.13A-749

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-54

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PROBLEM SYMPTOMS TABLE (FOR YOUR INFORMATION)

IM240 test failure

Transient, mass emission tailpipe test failure

18

P.13A-751

Purge flow test of the evaporative emission 
canister failure

19

P.13A-755

Pressure test of the evaporative system failure

20

P.13A-756

Generator output voltage is low (approximately 12.3 volts)

21

P.13A-757

Power supply system and ignition switch-IG system

22

P.13A-760

Fuel pump system

23

P.13A-771

Ignition switch-ST system and starter relay system <M/T>

24

P.13A-784

Ignition switch-ST system and starter relay system <TC-SST>

25

P.13A-796

Ignition circuit system

26

P.13A-808

A/C system

27

P.13A-813

Engine oil pressure switch system

28

P.13A-816

TROUBLE SYMPTOMS

INSPECTION 
PROCEDURE

REFERENCE PAGE

ITEMS

SYMPTOM

At starting

Won't start 

The starter cranks the engine, but there is no combustion within the 
cylinders, and the engine won't start.

Starts up and 
dies

The engine starts, but then engine soon stalls.

Hard starting

Engine starts after cranking a while.

Idling stability Hunting

Engine speed doesn't remain constant; changes at idle.

Rough idle

Usually, a judgement can be based upon the movement of the 
tachometer pointer, and the vibration transmitted to the steering wheel, 
shift lever, body, etc.

Incorrect idle 
speed

The engine doesn't idle at the correct speed.

Engine stall (die 
out)

The engine stalls when the foot is taken from the accelerator pedal, 
regardless of whether the vehicle is moving or not. 

Engine stall (pass 
out)

The engine stalls when the accelerator pedal is depressed.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-55

At driving

Hesitation Sag

"Hesitation" is the delay in 
response of the vehicle speed 
(engine speed). This occurs 
when the accelerator is 
depressed in order to accelerate 
from the speed at which the 
vehicle is now traveling, or a 
temporary drop in vehicle speed 
(engine speed) during such 
acceleration. 
Serious hesitation is called 
"sag".

Poor acceleration Poor acceleration is inability to obtain an acceleration corresponding to 

the degree of throttle opening, even though acceleration is smooth. Also 
the inability to reach maximum speed. 

Stumble

Engine speed increase is 
delayed when the accelerator 
pedal is initially depressed for 
acceleration. 

Shock

The feeling of a comparatively large impact or vibration when the engine 
is accelerated or decelerated. 

Surge

This is slight acceleration and deceleration feel usually felt during 
steady, light throttle cruise. Most notable under light loads.

Knocking

A sharp sound during driving, which sounds like a hammer striking the 
cylinder walls. It makes poor driveability.

At stopped

Run on 
("Dieseling") 

The condition in which the engine continues to run after the ignition 
switch is turned to the "LOCK" (OFF) position. Also called "dieseling".

ITEMS

SYMPTOM

AKX01361

Vehicle
speed

Time

Normal

Hesitation

Sag

Initial
accelerator
pedal
depression

AC

AKX01362

Stumble

Idling

Vehicle
speed

Time

Normal

Initial
accelerator
pedal
depression

AD

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-56

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC P0010: Intake Engine Oil Control Valve Circuit

AK704290

1

2

3 4 5 6 7 8 9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

1

3

2

4

1 2 3

4 5 6

1 2

1

1

2

B-20

B-09

20A

WHITE

WHITE

WHITE

VIOLET

WHITE

A-34X

4

3

1

2

22

OFF

ON

AB

36

FUSIBLE LINK

2

A-39

MU802607

INTAKE ENGINE OIL CONTROL VALVE CIRCUIT

INTAKE ENGINE OIL
CONTROL VALVE

MFI
RELAY

RELAY BOX
(ENGINE COMPARTMENT)

ENGINE
CONTROL
MODULE

TO ECM