Mitsubishi Outlander (2013+). Manual - part 551

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-65

Code No.B1140 KOS authentification error

DIAGNOSTIC FUNCTION

If any abnormal data is received from KOS-ECU as a 
result of the certification communication with 
KOS-ECU, OSS-ECU sets the diagnosis code 
No.B1140, and displays the immobilizer certification 
system inspection warning screen to the multi infor-
mation display of the combination meter.

JUDGEMENT CRITERIA

Check Conditions

• At KOS-ECU certification (at transition of power 

supply mode from OFF to ACC)

Judgment Criterion

• As a result of the certification communication with 

KOS-ECU, OSS-ECU receives the abnormal 
data from KOS-ECU.

PROBABLE CAUSES

• KOS-ECU malfunction (KOS-ECU has been 

interchanged between two vehicles, or various 
registrations are not complete after KOS-ECU 
replacement)

• Malfunction of the CAN bus line

• Malfunction of OSS-ECU

DIAGNOSIS PROCEDURE

1. M.U.T.-III CAN bus diagnosis (after turning the 

forced power supply output to "IG-ON" using the 
M.U.T.-III)

2. KOS-ECU diagnosis code check (after turning the 

forced power supply output to "IG-ON" using the 
M.U.T.-III)

3. OSS-ECU diagnosis code recheck

Code No. B1141 ESL authentification timeout

CAUTION

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

DIAGNOSTIC FUNCTION

If the necessary data cannot be received from the 
electric steering lock via LIN during the certification 
communication with electric steering lock, OSS-ECU 
sets the diagnosis code No.B1141, and displays the 
immobilizer certification system inspection warning 
screen to the multi information display of the combi-
nation meter.

JUDGEMENT CRITERIA

Check Conditions

• At electric steering lock certification

Judgment Criterion

• During the certification communication with elec-

tric steering lock, the necessary data cannot be 
received from the electric steering lock via LIN.

PROBABLE CAUSES

• LIN bus line malfunction (open circuit, short to 

earth, or short to power supply in LIN line)

• Damaged wiring harness or connector (open cir-

cuit or short to earth in PCO line, or open circuit 
in PWR line)

• Electric steering lock malfunction

• Malfunction of OSS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check of open circuit in PWR line 
between electric steering lock connector and 
fusible link

NOTE: Before the wiring harness check, check the 
joint connector, ETACS-ECU connector, and repair if 
necessary.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the connector(s) or wiring harness.

STEP 2. Check of short to power supply, short of 
earth, and open circuit in PCO line between 
electric steering lock connector and OSS-ECU 
connector

NOTE: Because the conformity cannot be deter-
mined even when the digital tester is used to meas-
ure the voltage of PCO line between the selector 
lever assembly connector and OSS-ECU connector, 
be sure to use the analogue tester. (With the keyless 
operation key placed outside of the vehicle, if the 
tester needle swings to the battery voltage when the 
engine switch is operated, it is judged normal.)

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the connector(s) or wiring harness.

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-66

STEP 3. Check of short to power supply, short of 
earth, and open circuit in LIN line between 
electric steering lock connector and OSS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair the connector(s) or wiring harness.

STEP 4. After performing the locking and 
unlocking operations of the electric steering 
lock, recheck the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Replace the electric steering lock and 

register the chassis number (Refer to 

P.42B-93

). Then go to Step 5.

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.

Q: Is the diagnosis code set?

YES : 

Replace the OSS-ECU and register the 

chassis number (Refer to 

P.42B-93

).

NO : 

The diagnosis is complete.

Code No. B1142 ESL authentification error

 

Code No. B1151 OSS authentification timeout(ESL)

DIAGNOSTIC FUNCTION

If the electric steering lock receives any abnormal 
data from OSS-ECU as a result of the certification 
communication with electric steering lock, OSS-ECU 
sets the diagnosis codes No.B1142 and No.B1151. 
At the same time, OSS-ECU displays the immobilizer 
certification system inspection warning screen to the 
multi information display of the combination meter.

JUDGEMENT CRITERIA

Check Conditions

• At electric steering lock certification

Judgment Criterion

• As a result of the certification communication with 

electric steering lock, the electric steering lock 
receives the abnormal data from OSS-ECU.

PROBABLE CAUSES

• Electric steering lock malfunction (electric steer-

ing lock has been interchanged between two 
vehicles)

• OSS-ECU malfunction (OSS-ECU has been 

interchanged between two vehicles)

DIAGNOSIS PROCEDURE

STEP 1. After turning the forced power supply 
output to "IG-ON" using the M.U.T.-III, check if the 
diagnosis code No.B1161 is set.

Q: Is the diagnosis code set?

YES : 

Carry out the troubleshooting for the 

diagnosis code No.B1161. Refer to 

P.42B-73

.

NO : 

Go to Step 2.

STEP 2. After performing the locking and 
unlocking operations of the electric steering 
lock, recheck the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Replace the electric steering lock and 

register the chassis number (Refer to 

P.42B-93

).

NO : 

Intermittent malfunction is suspected (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

Code No. B1143 ESL status fail

DIAGNOSTIC FUNCTION

If a status error is received from the electric steering 
lock via LIN, OSS-ECU sets the diagnosis code 
No.B1143, and displays the immobiliser certification 
system inspection warning screen to the multi infor-

mation display of the combination meter.

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-67

NOTE: In addition, when the electric steering lock 
was replaced, the diagnosis code No.B1143 may be 
set with the electric steering lock locked (a new elec-
tric steering lock is in the unlocked status). There-
fore, before the diagnosis code recheck of after the 
replacement of electric steering lock, be sure to per-
form the locking control of the electric steering lock 
first.

JUDGEMENT CRITERIA

Check Conditions

• After OSS-ECU activation

Judgment Criterion

• Status abnormality is received from the electric 

steering lock via LIN.

PROBABLE CAUSES

• Electric steering lock malfunction

• Malfunction of OSS-ECU

DIAGNOSIS PROCEDURE

STEP 1. After performing the locking and 
unlocking operations of the electric steering 
lock, recheck the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Replace the electric steering lock and 

register the chassis number (Refer to 

P.42B-93

). Then go to Step 2.

NO : 

Go to Step 2.

STEP 2. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code set?

YES : 

Replace the OSS-ECU and register the 

chassis number (Refer to 

P.42B-93

).

NO : 

Intermittent malfunction is suspected (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

Code No. B1144 ESL actuation not completed

DIAGNOSTIC FUNCTION

If the control completion information cannot be 
received from the electric steering lock via LIN when 
the electric steering lock is locked/unlocked, 
OSS-ECU sets the diagnosis code No.B1144. At the 
same time, OSS-ECU displays the immobilizer certi-
fication system inspection warning screen to the 
multi information display of the combination meter.

JUDGEMENT CRITERIA

Check Conditions

• After OSS-ECU activation

Judgment Criterion

• Control completion information is not received 

from the electric steering lock.

PROBABLE CAUSES

• Electric steering lock malfunction

• LIN bus line malfunction

• Malfunction of OSS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check of short to power supply, short of 
earth and open circuit in LIN line between electric 
steering lock connector and OSS-ECU connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the connector(s) or wiring harness.

STEP 2. After performing the locking and 
unlocking operations of the electric steering 
lock, recheck the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Replace the electric steering lock and 

register the chassis number (Refer to 

P.42B-93

). Then go to Step 3.

NO : 

Go to Step 3.

STEP 3. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code set?

YES : 

Replace the OSS-ECU and register the 

chassis number (Refer to 

P.42B-93

).

NO : 

Intermittent malfunction is suspected (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-68

Code No. B1145 ESL drive circuit fail

 

Code No. B1152 ESL drive circuit fail(ESL)

CAUTION

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

DIAGNOSTIC FUNCTION

When an error is detected to the driving circuit of 
electric steering lock, OSS-ECU sets the diagnosis 
codes No.B1145 and No.B1152. At the same time, 
OSS-ECU displays the immobiliser certification sys-
tem inspection warning screen to the multi informa-
tion display of the combination meter.

JUDGEMENT CRITERIA

Check Conditions

• At electric steering lock certification

Judgment Criterion

• Abnormal signal is received from the electric 

steering lock.

PROBABLE CAUSES

• Damaged wiring harness or connector (open cir-

cuit or short to earth in PCK line)

• Electric steering lock malfunction

• Malfunction of KOS-ECU

• Malfunction of OSS-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III other system diagnosis code
After turning the forced power supply output to 
"IG-ON" using the M.U.T.-III, check the diagnosis 
code of KOS-ECU.

Q: Is the diagnosis code set?

YES : 

Diagnose the KOS. Refer to 

P.42B-11

.

NO : 

Go to Step 2.

STEP 2. Check of short to power supply, short of 
earth and open circuit in PCKM line between 
KOS-ECU connector and OSS-ECU connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the connector(s) or wiring harness.

STEP 3. After performing the locking and 
unlocking operations of the electric steering 
lock, recheck the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Replace the electric steering lock and 

register the chassis number (Refer to 

P.42B-93

). Then go to Step 4.

NO : 

Intermittent malfunction is suspected (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

STEP 4. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code set?

YES : 

Replace the OSS-ECU and register the 

chassis number (Refer to 

P.42B-93

).

NO : 

The diagnosis is complete.

Code No. B1146 ESL internal circuit fail

 

Code No. B1153 ESL internal circuit fail(ESL)

DIAGNOSTIC FUNCTION

When an error is detected to the internal circuit of 
electric steering lock, OSS-ECU sets the diagnosis 
codes No.B1146 and No.B1153. At the same time, 
OSS-ECU displays the immobiliser certification sys-
tem inspection warning screen to the multi informa-
tion display of the combination meter.

JUDGEMENT CRITERIA

Check Conditions

• At electric steering lock certification

Judgment Criterion

• Abnormal signal is received from the electric 

steering lock.

PROBABLE CAUSES

• Electric steering lock malfunction