Mitsubishi Outlander (2013+). Manual - part 546

TROUBLESHOOTING <KOS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-45

Inspection Procedure 14: Multimode keyless entry function does not work at all.

CAUTION

Before replacing the ECU, ensure that the power 
supply circuit, the earth circuit and the communi-
cation circuit are normal.

OPERATION

With a ETACS customisation function, using the key-
less operation key, the electric-folding door mirrors 
<Vehicles with electric retractable remote controlled 
door mirrors> can be activated.

PROBABLE CAUSES

• Malfunction of the keyless operation key

• Function setting error or no setting with a custom-

isation

• Malfunction of ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the keyless entry function 
operation.
Check that the keyless entry system works normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to inspection procedure 11 "keyless 
entry function does not work 

P.42B-42

."

STEP 2. Check the operation of the 
electric-folding door mirror.
Check that the electric folding door mirrors work nor-
mally.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Refer to GROUP 51 

− Troubleshooting .

STEP 3. Check the customisation
Use the customisation function to check that the 
"Multi mode" has been set to other than "Disabled."
Vehicles with electric retractable remote controlled 
door mirrors

• D/M: O and C.

Q: Is it set to other than "disabled"?

YES : 

Go to Step 4.

NO : 

Use the customisation function to set the 
"Multi mode" to other than "Disabled" (Refer 
to 

P.42B-90

).

STEP 4. M.U.T.-III diagnosis code
Check if any diagnosis code is set to the KOS-ECU.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.42B-11

.

NO : 

Go to Step 5.

STEP 5. Check of the troubles
Check that the multimode keyless entry function 
works normally.

Q: Is the check result normal?

YES : 

Intermittent malfunction is suspected (Refer 

to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Deal with Intermittent Malfunction ).

NO : 

Replace ETACS-ECU. After the 
replacement, perform the coding.

Inspection Procedure 15: Outer buzzer does not sound.

CAUTION

Before replacing the ECU, ensure that the power 
supply circuit, the earth circuit and the communi-
cation circuit are normal.

OPERATION

The outer buzzer sounds under the following condi-
tions.

• When the door is locked or unlocked with the 

keyless or keyless operation function

• Door lock does not operate.

• The keyless operation key is brought out of the 

vehicle.

• Also, with a customisation function, "Buzzer 

answerback" may be set to "Not Sound Buzzer."

PROBABLE CAUSES

• Malfunction of the outer buzzer

• Malfunction of the KOS-ECU

• Malfunction of the connector

• Function setting error or no setting with a custom-

isation

TROUBLESHOOTING <KOS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-46

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if any diagnosis code is set to the KOS-ECU.

Q: Is the diagnosis code set?

YES : 

 Refer to diagnosis code chart 

P.42B-11

.

NO : 

Go to Step 2.

STEP 2. Check the customisation
With a customisation function, check if "Buzzer 
answerback" is set to other than "Not Sound Buzzer."

Q: Is it set to other than "Not Sound Buzzer"?

YES : 

Go to Step 3.

NO : 

With a customisation function, "Buzzer 
answerback" is set to other than "Not Sound 
Buzzer" (Refer to 

P.42B-90

).

STEP 3. M.U.T.-III actuator test
Check that the outer buzzer sounds (Refer to 

P.42B-33

).

Q:  Is the check result normal?

YES : 

Go to Step 5.

NO : 

Replace the outer buzzer. Go to Step 4.

STEP 4. Check of short to power supply, short to 
earth, and open circuit in DRVB, PWRB line 
between the KOS-ECU connector and the outer 
buzzer connector.

NOTE: Before the wiring harness check, check the 
intermediate connector, and repair if necessary.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the wiring harness.

STEP 5. Check of the troubles
Check that the outer buzzer sounds when the outer 
buzzer sounding conditions are met.

Q: Is the check result normal?

YES : 

Intermittent malfunction is suspected (Refer 

to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Deal with Intermittent Malfunction ).

NO : 

Replace KOS-ECU and register the ID 
codes (Refer to 

P.42B-88

).

Inspection Procedure 15: Power door locks with selective unlocking does not work.

CAUTION

Before replacing the ECU, ensure that the power 
supply circuit, the earth circuit and the communi-
cation circuit are normal.

COMMENT ON TROUBLE SYMPTOM

When the keyless entry function and door entry func-
tion operate normally, but there is an error to only the 
power door locks with selective unlocking, 
ETACS-ECU may have a problem. In addition, it is 
possible that the function has been set to "all doors 
unlock" by the customisation function.

PROBABLE CAUSES

• Malfunction of ETACS-ECU

• Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the customisation

Q: Are the power door locks with selective unlocking 

enabled by the customisation function?

YES : 

Go to Step 2

NO : 

Set the power door locks with selective 
unlocking to "Enabled" by using the 
customisation function. Refer to 

P.42B-90

.

STEP 2. Power door locks with selective 
unlocking operation check
Check that the power door locks with selective 
unlocking operate normally by means of the keyless 
entry function or door entry function.

Q: Is the check result normal?

YES : 

Go to Step 5

NO (Does not work by means of keyless entry 
function) : 

Go to Step 3

NO (Does not work by means of door entry 
function) : 

Go to Step 4

NO (Does not work by means of either functions) : 

Go to Step 5

TROUBLESHOOTING <KOS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-47

STEP 3. Keyless entry system operation check
Press the unlock switch of the keyless operation key 
and check that only the driver's door is unlocked. 
Then, press the unlock switch once again within 2 
seconds after that to check that the front passenger's 
door, rear doors, and tailgate are unlocked.

Q: Does the keyless entry function work normally?

YES : 

Go to Step 5

NO (Only the driver's door is not unlocked.) : 

Replace ETACS-ECU.

NO (The driver's door, front passenger's door, rear 
doors, and tailgate are not unlocked.) : 

Refer to 

Inspection Procedure 8: "Keyless entry 
function does not work 

P.42B-42

."

STEP 4. Door entry function operation check
Press the lock/unlock switch (driver’s side) and 
check that only the driver's door is unlocked. Then, 
press the lock/unlock switch (driver’s side) once 
again within 2 seconds after that to check that the 
front passenger's door, rear doors, and tailgate are 
unlocked.

Q: Does the door entry function work normally?

YES : 

Go to Step 5

NO (Only the driver's door is not unlocked.) : 

Replace ETACS-ECU.

NO (The driver's door, front passenger's door, rear 
doors, and tailgate are not unlocked.) : 

Refer to 

Inspection Procedure 6: "Driver's door 
lock/unlock switch does not work 

P.42B-38

."

STEP 5. Check of the troubles
Check that the power door locks with selective 
unlocking works normally.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

NO : 

Replace ETACS-ECU.

TERMINAL VOLTAGE REFERENCE CHART

M1429606800704

KOS-ECU TERMINAL CHECK

AC905451

Terminal 
number

Terminal 
code

Check item

Check condition

Normal condition

1

ANTP

Immobilizer antenna output (+) When communicating with the 

keyless operation key 
(discharged battery) in the key 
slot

0 to 5 V (pulse 
signal)

2

CANL

CAN L

−

−

3

CANH

CAN H

−

−

4

GND

Earth

Always

1 V or less

5

PWRB

Output to buzzer (+)

Buzzer is sounding

10 to 12 V (pulse 
signal)

6

−

−

−

−

7

IG1

Power supply from ignition 
switch (IG1)

Ignition switch: ON

System voltage

8

PWR

Battery power supply

Always

System voltage

TROUBLESHOOTING <KOS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-48

9

ANTG

Immobilizer antenna output (-)

When communicating with the 
keyless operation key 
(discharged battery) in the key 
slot

0 to 5 V (pulse 
signal)

10,

−

−

−

−

11

GTOP

Tailgate lock release handle 
output

Open switch of tailgate lock 
release handle: ON

1 V or less

12, 13

−

−

−

−

14

GTRQ

Tailgate lock release handle 
output

Lock switch of tailgate lock 
release handle: ON

1 V or less

15

ASRQ

Lock/unlock switch 
(passenger’s side) output

Lock/unlock switch: ON

1 V or less

16

DRRQ

Lock/unlock switch (driver’s 
side) output

Lock/unlock switch: ON

1 V or less

AC905452

Terminal 
number

Terminal 
code

Check item

Check condition

Normal condition

Terminal 
number

Terminal 
code

Check item

Check condition

Normal condition

21

BKOS

Power supply

While the power supply fuse 
(IOD fuse) is removed, when 
the engine switch is pressed 
from the engine switch power 
supply mode OFF

System voltage

22

−

−

−

23

PCK

Output of electric steering lock 
driving permission signal

• KOS-ECU active

• Engine stopped

System voltage

24 

− 27

−

−

−

28

EGTP

Outside transmission antenna 
assembly (tailgate) power 
supply

• At the door switch operation

• At the engine switch 

operation

• At door open/close

0 to 8 V (pulse 
signal)

29

INRP

Inside transmission antenna 
assembly (rear) power supply

• At the door switch operation

• At the engine switch 

operation

• At door open/close

0 to 8 V (pulse 
signal)

30

EASP

Outside transmission antenna 
assembly (passenger’s side) 
power supply

• At the door switch operation

• At the engine switch 

operation

• At door open/close

0 to 8 V (pulse 
signal)