Mitsubishi Outlander (2003+). Manual — part 78

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-175

INSPECTION CHART FOR TROUBLE SYMPTOMS

M1131151500522

Items

Trouble symptom

Inspection
procedure
No.

Communication
with MUT-II is
impossible

Communication with all system is not possible

1

Communication with engine-ECU only is not possible

2

Engine warning
lamp

The engine warning lamp does not illuminate right after the ignition switch
is turned the "ON" position

3

The engine warning lamp remains illuminating and never goes out

4

Starting

Starting impossible
(No initial combustion)

The starter is impossible to operate. 5

Starting impossible
(Starter operative but no initial
combustion)

The starter is operative and cranks
the engine, but none of initial
combustion is in the cylinders and
the engine is not started.

6

Starting impossible
(Initial combustion but no complete
combustion)

The initial combustion occurs, but
the engine stalls soon due to the
incomplete combustion.

7

Improper starting
(Long time to start)

It is long cranking to start the engine.

Improper idling

Unstable idling
(Rough idling, hunting)

The engine speed is not constant
and changeable during the idling.
Usually, the judgment can be based
on the movement of the tachometer
pointer, also on the vibration
transmitted to the steering wheel, sift
lever, vehicle body and so on.

8

Improper idling speed

The proper idling speed is not
satisfied.

Engine stalled during idling
(Die out)

The engine stalls during the idling in
no relation to the vehicle movement.

Engine stalls

The engine stalls when starting the
car
(Pass out)

The engine stalls during the
operation, or when the accelerator
pedal is depressed from the idling.

9

The engine stalls when
decelerating

The engine stalls at the deceleration. 10

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-176

Driving

Engine does not revolve up

The engine speed is not higher when
the accelerator pedal is depressed.

11

Hesitation, sag

The response of vehicle speed
(engine speed) is delayed when the
accelerator pedal is depressed, or
the vehicle speed (engine speed) is
temporarily dropped during the
acceleration. These phenomena are
called "hesitation" and the serious
hesitation is called "sag".

12

Poor acceleration

The engine cannot obtain the
acceleration corresponding to the
degree of throttle opening although
the engine is smooth at the constant
speed.

Stumble

The engine speed increase is
delayed when the accelerator pedal
is initially depressed at the starting.

Surge

The vehicle body is repeated to
vibrate jollity in the forward and
backward directions at the constant
speed or acceleration.

The feeling of impact or vibration
when accelerating

The large impact feeling occurs at
the acceleration.

13

The feeling of impact or vibration
when decelerating

The large impact feeling occurs at
the deceleration.

14

Knocking

Sharp sound like a hammer striking
on the cylinder walls during the
driving can be heard and wrongly
affects the driving.

15

Ignition timing offset

The basic ignition timing is deviated
from the datum value.

16

Stopping

Run on (Dieseling)

The engine continues to run after the
ignition switch is in "LOCK (OFF)"
position.

17

Exhaust gas

Odor, white smoke, black smoke,
high-concentration CO/HC during
idling

The exhaust gas is extremely rank
odor, white smoke or black smoke.
The concentration of CO & HC is
high during the idling.

18

Charging
performance

Battery rundown

The battery is soon rundown or the
charging ability of battery is small.

19

Items

Trouble symptom

Inspection
procedure
No.

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-177

PROBLEM SYMPTOMS TABLE

Cooling
performance

Overheating

The temperature of engine cooling
water is extremely high.

20

Abnormal rotation of fan Motor

The fan motor is abnormally rotated
when the ignition switch is in "ON"
position in no relation to the engine
cooling water temperature.

21

A/C performance

Poor A/C Performance

The temperature of air cooling from
A/C is not efficient or very far from
the target temperature.

22

Items

Trouble symptom

Inspection
procedure
No.

Inspection
procedure
No.

Trouble symptom

Reference
page

1

Communication with all system is not possible

3

13A

2

Communication with engine-ECU only is not possible

3

13A



3

The engine warning lamp does not illuminate right after the ignition switch is
turned the "ON" position

3

13A



4

The engine warning lamp remains illuminating and never goes out

3

13A

5

Starting impossible (No initial combustion)

3

13A

6

Starting impossible (Starter operative but no initial combustion)

3

13A

7

Starting impossible (Initial combustion but no complete combustion)

3

13A

Starting impossible (Long time to start)

8

Unstable idling (Rough idling, hunting)

3

13A

Improper idling speed (Too high or too low)

Engine stalls during idling (Die out)

9

The engine stalls when starting the car (pass out)

3

13A

10

The engine stalls when decelerating

3

13A

11

Engine does not revolve up

3

13A

12

Hesitation, sag

3

13A

Poor acceleration

Stumble

Surge

13

The feeling of impact or vibration when accelerating

3

13A

14

The feeling of impact or vibration when decelerating

3

13A

15

Knocking

3

13A



16

Ignition timing offset

3

13A

17

Run on (Dieseling)

3

13A

18

Odor, white smoke, black smoke, high-concentration CO/HC during idling

3

13A

19

Battery rundown

3

13A

20

Overheating

3

13A



TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-178

21

Abnormal rotation of fan motor

3

13A

22

Poor A/C performance

3

13A

23

Engine-ECU power supply, engine control relay, ignition switch-IG1 system

3

13A

24

Fuel pump system

3

13A

25

Fan control relay system

3

13A

26

A/C switch system

3

13A

27

A/C compressor relay system

3

13A

28

A/C load signal system

3

13A

29

A/C pressure sensor system

3

13A

30

Ignition circuit system

3

13A



Inspection
procedure
No.

Trouble symptom

Reference
page