Mitsubishi Outlander GS45X. Manual - part 1144

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-155

STEP 6. Check of the troubles
Operate the liftgate lock release handle and check that the lift-
gate can be locked and opened.
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 

P.00-15

).

NO :  Replace KOS-ECU and register the ID codes (Refer 

to 

P.42B-188

).

Inspection Procedure 10: The lock switch of the liftgate lock release handle does not perform the 
locking operation.

CAUTION

Before replacing the ECU, ensure that the power 
supply circuit, the ground circuit and the com-
munication circuit are normal.

ACA02762

KOS-ECU

OPEN 
SWITCH 

LOCK
SWITCH 

LIFTGATE LOCK 
RELEASE HANDLE

Liftgate Lock Release Handle Circuit

AB

BLA

CK

BLA

CK

BLA

CK-

YELLO

W

GRA

Y

BR

O

W

N

B

R

O

WN

BR

O

W

N

GRA

Y

GRA

Y

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-156

.

PROBABLE CAUSES

• Malfunction of the outside transmission antenna 

assembly (liftgate)

• Malfunction of the liftgate lock release handle 

(lock switch)

• Damaged wiring harness and connectors

• Malfunction of the KOS-ECU

DIAGNOSIS

STEP 1. Using scan tool MB991958, read the diagnostic 
trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect 

scan tool (M.U.T.-III) 

P.42B-13

."

(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the KOS-ECU. Refer to Diagnostic Trouble 

Code Chart 

P.42B-35

.

NO :  Go to Step 2.

AC901075AF

Connectors: C-32, C-102

C-32

C-102

AC901080AM

Connector: D-12

AC901375AC

Connector: F-09

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-157

STEP 2. Check KOS-ECU connector C-102 and liftgate lock 
release handle connector F-09 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are KOS-ECU connector C-102 and liftgate lock release 

handle connector F-09 in good condition?
YES : Go to Step 3.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Check that the liftgate lock release handle 

works normally.

STEP 3. Check the wiring harness between KOS-ECU 
connector C-102 (terminal No. 22) and liftgate lock release 
handle connector F-09 (terminal No. 3). 

• Check the signal wires for open circuit.

NOTE: Also check intermediate connectors C-32, D-12 for 
loose, corroded, or damaged terminals, or terminals pushed 
back in the connector. If intermediate connectors C-32, D-12 is 
damaged, repair or replace the damaged component(s) as 
described in GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between KOS-ECU connector 

C-102 (terminal No. 22) and liftgate lock release handle 
connector F-09 (terminal No. 3) in good condition?
YES : Go to Step 4.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Check that 
the liftgate lock release handle works normally.

STEP 4. Liftgate lock release handle check
(1) Remove the liftgate lock release handle (Refer to GROUP 

42A, Liftgate Handle and Latch 

P.42A-174

).

(2) Check continuity when the liftgate lock release handle is 

operated to "ON" or "OFF" position.

Q: Is the liftgate lock release handle normal?

YES : Go to Step 5.
NO :  Replace the liftgate lock release handle. Check that 

the liftgate lock release handle works normally.

Switch 
position

Terminal 
number

Normal value

Push (lock)

2 

− 3 

Continuity 
exists (2 

Ω or 

less)

Release

2 

− 3 

No continuity

ACA00837AE

Lock switch

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-158

STEP 5. KOS communication test
Using scan tool (M.U.T-III), perform the antenna communica-
tion test to check that the outside transmission antenna assem-
bly (liftgate) communicates normally (Refer to 

P.42B-197

).

Q: Is the check result normal?

YES : Go to Step 6
NO :  Perform troubleshooting for the diagnostic trouble 

code No. B240C (Refer to 

P.42B-35

).

STEP 6. Check of the troubles
Operate the liftgate lock release handle and check that the lift-
gate can be locked.
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 

P.00-15

).

NO :  Replace KOS-ECU and register the ID codes (Refer 

to 

P.42B-188

).