Mitsubishi Outlander (2013+). Manual - part 310

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-121

GROUP 00 

−

 How to Use Troubleshoot-

ing/Inspection Service Points 

−

 How to Cope with 

Intermittent Malfunctions ). It is possible to nar-
row down areas with a high possibility of malfunc-
tions from diagnosis codes set to each ECU that 
performs CAN communication (Refer to GROUP 
54C 

−

 Explanation about the M.U.T.-III CAN Bus 

Diagnostics ).

FAIL-SAFE AND BACKUP FUNCTION

• Engine start is prohibited.

PROBABLE CAUSES

• Failed harness and connector

• Failed KOS-ECU

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis

• Use M.U.T.-III to perform CAN bus line diagnosis.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting − CAN Bus 

Diagnostics Table ). After repairing the CAN 
bus line, go to Step 4.

STEP 2. M.U.T.-III diagnosis code

• Confirm the diagnosis code is set from the 

KOS-ECU.

Q: Is diagnosis code set?

YES : 

Perform troubleshooting of KOS-system 

(Refer to GROUP 42B 

− Troubleshooting − 

Diagnosis Code Chart ).

NO : 

Go to Step 3.

STEP 3. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Confirm again the diagnosis code is set from the 
engine-ECU.

1. Erase the set diagnosis code.
2. Ignition switch: "LOCK" (OFF) 

→ "ON"

3. Confirm whether the diagnosis code is set.

Q: Is diagnosis code set?

YES : 

After replacing engine-ECU, go to Step 4.

NO : 

Intermittent malfunction in CAN bus line 
between engine-ECU and KOS-ECU (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

STEP 4. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Confirm again the diagnosis code is set from the 
engine-ECU.

1. Erase the set diagnosis code.
2. Ignition switch: "LOCK" (OFF) 

→ "ON"

3. Confirm whether the diagnosis code is set.

Q: Is diagnosis code set?

YES : 

Go to Step 1.

NO : 

Check end.

Code No. U0415: ASC-ECU CAN Data Abnormality <Vehicles with ASC>

CAUTION

If diagnosis code U0415 is set from engine-ECU, 
surely perform CAN bus line diagnosis.

CAUTION

Replace ECU after certainly confirming that the 
communication circuits are normal.

TROUBLE JUDGMENT

Check Conditions

• More than 5 seconds have passed since the igni-

tion switch was turned to "ON" position.

• During engine running.

Judgement Criterion

• When the communication error is judged 

between the engine-ECU and the ASC-ECU

COMMENTS ON TROUBLE SYMPTOM

Current malfunction

• The failure is possibly caused by malfunction of 

the harness and connector in CAN bus line 
between engine-ECU and ASC-ECU, by mal-
function in ASC-ECU signals, in ASC-ECU itself, 
in engine-ECU.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-122

Past malfunction

• Proceed with troubleshooting focusing on mal-

function of the harness and connector in CAN 
bus line between engine-ECU and ASC-ECU and 
malfunction in ASC-ECU signals. For diagnosis 
procedure, refer to how to cope with past mal-
functions. (Refer to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− How 

to Treat Past Trouble ).

NOTE: In the case of past malfunctions, M.U.T.-III 

CAN bus line diagnosis cannot detect a malfunc-
tion even if there is a malfunction in CAN bus. 
Therefore, check CAN bus line as in the case of 
response to intermittent malfunctions (Refer to 
GROUP 00 

−

 How to Use Troubleshoot-

ing/Inspection Service Points 

−

 How to Cope with 

Intermittent Malfunctions ). It is possible to nar-
row down areas with a high possibility of malfunc-
tions from diagnosis codes set to each ECU that 
performs CAN communication (Refer to GROUP 
54C 

−

 Explanation about the M.U.T.-III CAN Bus 

Diagnostics ).

FAIL-SAFE AND BACKUP FUNCTION

• Torque requested by active stability control (ASC) 

is ignored. 

PROBABLE CAUSES

• Failed harness and connector

• Signal failure input into engine-ECU sent from 

ASC-ECU through CAN communication

• Failed ASC-ECU

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis

• Use M.U.T.-III to perform CAN bus line diagnosis.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair CAN bus line (Refer to GROUP 54C 
− Troubleshooting − CAN Bus Diagnosis 
Table ). After repairing CAN bus line, go to 
Step 6.

STEP 2. M.U.T.-III diagnosis code

• Confirm the diagnosis code is set from the 

ASC-ECU.

Q: Is diagnosis code set?

YES : 

Perform troubleshooting of the active 

stability control (ASC) system (Refer to 
GROUP 35C 

− Troubleshooting − Diagnosis 

Code Chart ).

NO : 

Go to Step 3.

STEP 3. M.U.T.-III diagnosis code
Check that the other ECU performing CAN communi-
cation with ASC-ECU sets diagnosis code No. 
U0415 [Refer to GROUP 54C 

− CAN Communica-

tion-related Diagnosis Code (U-code) Table ].

Q: Is diagnosis code set?

YES : 

Go to Step 4.

NO : 

Go to Step 5.

STEP 4. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Confirm again the diagnosis code is set from the 
engine-ECU.

1. Erase the set diagnosis code.
2. Ignition switch: "LOCK" (OFF) 

→ "ON"

3. Confirm whether the diagnosis code is set.

Q: Is diagnosis code set?

YES : 

After replacing ASC-ECU, go to Step 6.

NO : 

Intermittent malfunction in CAN bus line 
between engine-ECU and ASC-ECU (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

STEP 5. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Confirm again the diagnosis code is set from the 
engine-ECU.

1. Erase the set diagnosis code.
2. Ignition switch: "LOCK" (OFF) 

→ "ON"

3. Confirm whether the diagnosis code is set.

Q: Is diagnosis code set?

YES : 

After replacing engine-ECU, go to Step 6.

NO : 

Intermittent malfunction in CAN bus line 
between engine-ECU and ASC-ECU (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-123

STEP 6. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Confirm again the diagnosis code is set from the 
engine-ECU.

1. Erase the set diagnosis code.
2. Ignition switch: "LOCK" (OFF) 

→ "ON"

3. Confirm whether the diagnosis code is set.

Q: Is diagnosis code set?

YES : 

Go to Step 1.

NO : 

Check end.

INSPECTION CHART FOR TROUBLE SYMPTOMS

M1131151504267

Item

Trouble Symptom

Inspectio
n 
Procedur
e No.

Communication 
with M.U.T.-III is 
impossible

Communication between M.U.T.-III and engine-ECU is not possible.

1

Engine warning 
lamp

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

2

The engine warning lamp remains illuminating and never goes out.

3

Starting

Starting impossible (starter not 
operative)

The starter is not operable.

4

Starting impossible
(Starter operative but no initial 
combustion)

The starter is operative and cranks 
the engine, but no initial combustion 
occurs in the cylinders to start the 
engine.

5

Starting impossible (Initial 
combustion but no complete 
combustion)

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

6

Engine does not start properly 
(Long time to start)

The engine starts, but it takes too 
long for cranking.

Improper idling

Unstable idling
(Rough idling, hunting)

The engine speed is not constant and 
fluctuates during the idling. Usually, 
this malfunction can be judged from 
the shaking tachometer pointer or 
vibrations transmitted to the steering 
wheel, shift lever, vehicle body and so 
on.

7

Improper idling speed (Too high or 
too low)

The idling speed is not within the 
normal range.

Engine stalls 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 when the 
accelerator pedal is depressed in the 
idling speed, or during the operation.

8

Engine stalls at deceleration

The engine stalls at the deceleration.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-124

Driving

Engine does not revolve up

The engine speed does not increase 
even when the accelerator pedal is 
depressed.

9

Hesitation, sag
 

The response of vehicle speed 
(engine speed) is delayed when the 
accelerator pedal is depressed to 
accelerate vehicle speed, or the 
vehicle speed (engine speed) is 
temporarily dropped during the 
acceleration.
This phenomenon is called 
"hesitation" and a serious hesitation 
is called "sag".

10

Poor acceleration

The engine operates smoothly at a 
constant-speed run, but the vehicle 
does not accelerate properly as the 
throttle valve opening changes. In 
addition, vehicle will not run in the 
specified maximum speed.

Stumble

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

Surge

At a constant-speed or acceleration 
the vehicle is subject to repeated 
jerking (in terms of the drive speed) in 
the driving direction.

The feeling of impact or vibration 
when accelerating

The driver feels a sudden impact 
when the vehicle is accelerated.

11

The feeling of impact or vibration 
when decelerating

The driver feels a sudden impact 
when the vehicle is decelerated.

12

Knocking

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

13

Ignition timing deviation

The basic ignition timing is deviated 
from the datum value.

14

Stopping

Run on (Dieseling)

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

15

Exhaust gas

Odour, white smoke, black smoke
The concentration of CO/HC is high 
during the idling.

The exhaust has an abnormal odour. 
Either white or black exhaust gas 
comes out. The concentration of 
CO/HC is high during the idling.

16

Charging 
performance

Battery run down

The battery is soon rundown.
Or, the charging ability of battery is 
small.

17

Item

Trouble Symptom

Inspectio
n 
Procedur
e No.