Mitsubishi Outlander (2013+). Manual - part 541

TROUBLESHOOTING <KOS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-25

Code No.B2416 ECU internal error

DIAGNOSIS FUNCTION

KOS-ECU sets diagnosis code No. B2416 when it 
determines itself to be in abnormal status.

JUDGMENT CRITERIA

KOS-ECU determines that the abnormality is 
present, if the data abnormality is found when the 
ignition switch is turned ON and then EEPROM is 
written.

PROBABLE CAUSES

Malfunction of KOS-ECU

DIAGNOSIS PROCEDURE

1. Diagnosis code recheck.

Code No.B2417 OSS authentification error

CAUTION

When replacing the ECU, always check that the 
communication circuit is normal.

DIAGNOSIS FUNCTION

When abnormal data is received from OSS-ECU as 
a result of the certification communication with 
OSS-ECU, KOS-ECU sets the diagnosis code 
No.B2417.

JUDGEMENT CRITERIA

When abnormal data is received from OSS-ECU, 
KOS-ECU determines that a problem has occurred.

PROBABLE CAUSES

• Malfunction of OSS-ECU (OSS-ECUs have been 

interchanged between two vehicles.)

• Malfunction of KOS-ECU

DIAGNOSIS PROCEDURE

1. M.U.T.-III other system diagnosis code.

2. M.U.T.-III diagnosis code.

3. Check whether the diagnosis code is reset.

Code No.B2418 OSS authentification timeout

CAUTION

• If the diagnosis code No. B2418 is set, diag-

nose the CAN bus lines.

• When replacing the ECU, always check that 

the communication circuit is normal.

DIAGNOSIS FUNCTION

KOS-ECU checks whether the OSS-ECU data is 
received via CAN bus line, and it sets the diagnosis 
code No.B2418 if the data cannot be received.

JUDGEMENT CRITERIA

If the reception of data from OSS-ECU received via 
CAN bus line (OSS-ECU sends data to KOS-ECU 
via CAN bus line) is not possible, KOS-ECU deter-
mines that a problem has occurred.

PROBABLE CAUSES

• Malfunction of CAN bus line

• Malfunction of OSS-ECU

• Malfunction of KOS-ECU

DIAGNOSIS PROCEDURE

1. M.U.T.-III CAN bus diagnostics

2. M.U.T.-III other system diagnosis code

3. Check whether the diagnosis code is reset.

TROUBLESHOOTING <KOS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-26

Code No.B2419 LF antenna voltage short

CAUTION

When replacing the ECU, always check that the 
communication circuit is normal.

DIAGNOSTIC FUNCTION

When a short to power supply is detected in the wir-
ing harness in between the inside and outside trans-
mission antenna assembly, KOS-ECU sets the 
diagnosis code No.B2419.

NOTE: When the diagnosis code No.B2419 is set, 
KOS-ECU does not perform the certification with the 
keyless operation key.

JUDGMENT CRITERIA

When an abnormality is found with the wiring har-
ness in between the inside and outside transmission 
antenna assembly, KOS-ECU determines that a 
problem has occurred.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• Malfunction of the KOS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the wiring harness between 
KOS-ECU connector and each inside and outside 
transmission antenna assembly connector.
Check the following wiring harnesses for short to 
power supply.

• Check of short to power supply, short to earth, 

and open circuit in EDRP, EDRG line between 
KOS-ECU connector and outside transmission 
antenna assembly (driver’s side) connector

• Check of short to power supply, short to earth, 

and open circuit in EASP, EASG line between 
KOS-ECU connector and outside transmission 
antenna assembly (passenger’s side) connector

• Check of short to power supply, short to earth, 

and open circuit in INFP, INFG line between 
KOS-ECU connector and inside transmission 
antenna assembly (front) connector

• Check of short to power supply, short to earth, 

and open circuit in INRP, INRG line between 
KOS-ECU connector and inside transmission 
antenna assembly (rear) connector

• Check of short to power supply, short to earth, 

and open circuit in EGTP, EGTG line between 
KOS-ECU connector and outside transmission 
antenna assembly (tailgate) connector

Q: Is the check result normal?

YES : 

Go to Step 2

NO : 

Repair the connectors or wiring harness.

STEP 2. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Turn the power supply mode of the engine switch 

from OFF to ON.

(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace KOS-ECU and register the ID 

codes (Refer to 

P.42B-88

).

NO : 

The diagnosis is complete.

TROUBLESHOOTING <KOS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-27

Code No.B241A ESL power control circuit earth

 

Code No.B241B ESL power control circuit open

CAUTION

When replacing the ECU, always check that the 
communication circuit is normal.

DIAGNOSIS FUNCTION

B241A

• When a short to earth occurs in the wiring har-

ness between the electrical steering lock and 
KOS-ECU, KOS-ECU sets the diagnosis code 
No.B241A.

B241B

• When an open circuit or short to power supply 

occurs in the wiring harness between the electri-
cal steering lock and KOS-ECU, KOS-ECU sets 
the diagnosis code No.B241B.

JUDGEMENT CRITERIA

B241A

• When a short to earth occurs in the wiring har-

ness, KOS-ECU determines that a problem has 
occurred.

B241B

• When an open circuit or short to power supply 

occurs in the wiring harness, KOS-ECU deter-
mines that a problem has occurred.

PROBABLE CAUSES

• Malfunction of the electronic steering lock

• Malfunction of the KOS-ECU

• Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check of short to power supply, short to 
earth, and open circuit in PCK line between the 
electronic steering lock connector and the 
KOS-ECU connector, between the OSS-ECU 
connector and the KOS-ECU connector.

Q: Is the check result normal?

YES : 

Go to Step 2

NO : 

Repair the connectors or wiring harness.

STEP 2. Voltage measurement at electronic 
steering lock connector (PCK line)
(1) Disconnect the connector, and measure the 

voltage at the wiring harness-side connector.

(2) Open the driver's door.
(3) Measure the voltage at the electronic steering 

lock connector (PCK line) and the body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 3

NO : 

Replace the electronic steering lock. Go to 
Step 3.

STEP 3. Check whether the diagnosis code is 
reset.
(1) Erase the diagnosis code.
(2) Turn the power supply mode of the engine switch 

from OFF to ON.

(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace KOS-ECU and register the ID 

codes (Refer to 

P.42B-88

).

NO : 

Intermittent malfunction is suspected (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

Code No.U0141 ETACS CAN timeout

CAUTION

• If the diagnosis code No. U0141 is set, be sure 

to diagnose the CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

DIAGNOSIS FUNCTION

If no signal from ETACS can be received, KOS-ECU 
sets the diagnosis code No. U0141.

PROBABLE CAUSES

• Malfunction of CAN bus line

• Malfunction of KOS-ECU

TROUBLESHOOTING <KOS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-28

• Malfunction of ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ).

STEP 2. M.U.T.-III other system diagnosis code
Check if any diagnosis code is set to the 
ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Perform troubleshooting for ETACS (Refer 

to GROUP 54A 

− ETACS − Troubleshooting 

).

NO : 

Go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code
Check if diagnosis code No.U0141 is set to the com-
bination meter.

Q: Is the diagnosis code set?

YES : 

Go to Step 4.

NO : 

Go to Step 5.

STEP 4. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set to the 
KOS-ECU.
(1) Erase the diagnosis code.
(2) Turn the power supply mode of the engine switch 

from OFF to ON.

(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the ETACS-ECU.

NO : 

Intermittent malfunction is suspected (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

STEP 5. Check whether the diagnosis code is 
reset.
Recheck if the diagnosis code is set.
(1) Erase the diagnosis code.
(2) Turn the power supply mode of the engine switch 

from OFF to ON.

(3) Check if the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace KOS-ECU and register the ID 

codes (Refer to 

P.42B-88

).

NO : 

Intermittent malfunction is suspected (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to cope with Intermittent Malfunction ).

Code No.U0155 Meter CAN timeout

CAUTION

• If the diagnosis code No. U0155 is set, be sure 

to diagnose the CAN bus line.

• When replacing the ECU, always check that 

the communication circuit is normal.

DIAGNOSIS FUNCTION

If no signal from the combination meter can be 
received, KOS-ECU sets the diagnosis code No. 
U0155.

PROBABLE CAUSES

• Malfunction of CAN bus line

• Combination meter malfunction

• Malfunction of KOS-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ).

STEP 2. M.U.T.-III other system diagnosis code
Check if any diagnosis code is set to the combination 
meter.

Q: Is the diagnosis code set?

YES : 

Perform troubleshooting for the combination 

meter (Refer to GROUP 54A 

− Combination 

Meter 

− Troubleshooting ).

NO : 

Go to Step 3.