Mitsubishi Outlander (2013+). Manual - part 552

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-69

DIAGNOSIS PROCEDURE

1. After performing the locking and unlocking 

operations of the electric steering lock, recheck 
the diagnosis code of OSS-ECU.

Code No. B1147 LIN communication stop control

CAUTION

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

DIAGNOSTIC FUNCTION

When an error has occurred to the termination 
processing of LIN communication with the electric 
steering lock and the processing cannot be termi-
nated normally, OSS-ECU sets the diagnosis code 
No.B1147.

JUDGEMENT CRITERIA

Check Conditions

• At electric steering lock certification

Judgment Criterion

• LIN communication with the electric steering lock 

cannot be terminated normally.

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, and repair if neces-
sary.

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 to 
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.

STEP 3. Check of short to power supply, short to 
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.

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-70

Code No. B1148 ESL power supply

 

Code No. B1154 ESL power supply fail(ESL)

DIAGNOSTIC FUNCTION

When a short circuit (short to power supply) is 
detected in the power supply (microcomputer) circuit 
system of the electric steering lock, OSS-ECU sets 
the diagnosis codes No.B1148 and No.B1154. At the 
same time, OSS-ECU displays the steering lock 
abnormality warning screen to the multi information 
display of the combination meter. Also, when the 
diagnosis code No.B1148 is the past trouble, the LIN 
bus may have a problem.

JUDGEMENT CRITERIA

Check Conditions

• At electric steering lock certification

Judgment Criterion

• Short circuit (short to power supply) in the power 

supply (microcomputer) circuit system of the 
electric steering lock is detected.

PROBABLE CAUSES

• Damaged harness wires and connectors

• Electric steering lock malfunction

• Malfunction of OSS-ECU

• LIN bus malfunction <B1148 is the past trouble>

DIAGNOSIS PROCEDURE

STEP 1. Check of short to power supply, short of 
earth, and open circuit in PCO 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 )

Code No. B1149 ESL drive circuit fail

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 elec-
tric steering lock driving circuit during the engine start 
or during travelling, OSS-ECU sets the diagnosis 
code No.B1149. At the same time, OSS-ECU dis-
plays the steering lock abnormality warning screen to 
the multi information display of the combination 
meter.

JUDGEMENT CRITERIA

Check Conditions

• When all the following conditions are met.

a. Power supply mode: ON
b. Battery voltage: 8 V or more

c. During travelling (vehicle speed of 6 km/h or 

more) or engine is running (engine speed of 
60 r/min or more)

Judgment Criterion

• 1 second or more has elapsed after the PCKM 

voltage is judged to be 3.5 V or more.

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-71

PROBABLE CAUSES

• Damaged wiring harness or connector (short to 

power supply in PCK line)

• 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 (refer to 

P.42B-50

) 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-53

.

NO : 

Go to Step 2.

STEP 2. Check of short to power supply, short of 
earth, and open circuit in PCK 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. M.U.T.-III data list
Check the OSS-ECU data list.

Operation 
state

Item No.

Check item

Displ
ay

After 
starting 
the engine

9

ESL drive 
permission 
signal(KOS)

OFF

Other than 
above

ON

OK: Operation state and data list display 
agree with each other.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the OSS-ECU and register the 
chassis number (Refer to 

P.42B-93

)

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 : 

Intermittent malfunction is suspected (Refer 
to GROUP 00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction )

Code No.B1150 OSS authentification T/O.(ESL)

DIAGNOSTIC FUNCTION

If the electric steering lock cannot receive the neces-
sary data from OSS-ECU via LIN during the certifica-
tion communication, OSS-ECU sets the diagnosis 
code No.B1150. Also, when the diagnosis code 
No.B1150 is the past trouble, the LIN bus may have 
a problem.

JUDGEMENT CRITERIA

Check Conditions

• At electric steering lock certification

Judgment Criterion

• During the certification communication, the elec-

tric steering lock cannot receive the necessary 
data from OSS-ECU via LIN.

PROBABLE CAUSES

• Malfunction of OSS-ECU

• LIN bus malfunction <at past trouble>

DIAGNOSIS PROCEDURE

1. OSS-ECU diagnosis code recheck

Code No. B1155 EEPROM fail(ESL)

DIAGNOSTIC FUNCTION

When the EEPROM writing/reading error of the elec-
tric steering lock is detected, OSS-ECU sets the 
diagnosis code No.B1155.

JUDGEMENT CRITERIA

Check Conditions

• After OSS-ECU activation

TROUBLESHOOTING <OSS-ECU>

KEYLESS OPERATION SYSTEM (KOS)

42B-72

Judgment Criterion

• When the following conditions are met:

a. EEPROM writing/reading error is detected.
b. ECU internal circuit error is detected.

PROBABLE CAUSES

• Electric steering lock malfunction

DIAGNOSIS PROCEDURE

Check whether the diagnosis code is reset.

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. B1157 OSS EEPROM fail

 

Code No. B1158 OSS ECU internal fail

DIAGNOSTIC FUNCTION

• When an EEPROM writing/reading error of 

OSS-ECU is detected, OSS-ECU sets the diag-
nosis code No.B1157, and flashes the indicator of 
engine switch in orange.

• When an error is detected to the microcomputer 

in OSS-ECU, OSS-ECU sets the diagnosis code 
No.B1158, and flashes the indicator of engine 
switch in orange.

JUDGEMENT CRITERIA

Check Conditions

• After OSS-ECU activation

Judgment Criterion

• When the following conditions are met:

a. EEPROM writing/reading error is detected.
b. ECU internal circuit error is detected.

PROBABLE CAUSES

• Malfunction of OSS-ECU

DIAGNOSIS PROCEDURE

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. B1159 Chassis No. not programmed (OSS)

 

Code No. B1160 Key code not programmed (OSS)

 

Code No. B1164 Chassis No. not programmed(ESL)

 

Code No. B1165 Key code not programmed(ESL)

CAUTION

• When the diagnosis code No.B1159, B1160, 

B1164, or B1165 is set, be sure to diagnose 
the CAN bus line.

• Before replacing ECU, ensure that the com-

munication circuit is normal.

DIAGNOSTIC FUNCTION

• OSS-ECU sets the diagnosis code No.B1159 

when the chassis number is not written to 
OSS-ECU, and the diagnosis code No.B1160 
when the key code is not written.

NOTE: When OSS-ECU is new, the diagnosis codes 

No.B1159 and No.B1160 are set simultaneously.

• OSS-ECU sets the diagnosis code No.B1164 

when the chassis number is not written to the 
electric steering lock, and the diagnosis code 
No.B1165 when the key code is not written.

NOTE: When the electric steering lock is new, the 

diagnosis codes No.B1164 and No.B1165 are set 
simultaneously.