Mitsubishi Outlander GS45X. Manual - part 1126

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-83

STEP 3. Keyless operation system communication test
Check that the communication with the inside transmission 
antenna assembly (rear: passenger’s side) is normal (Refer to 
Antenna Test 

P.42B-197

).

Antennas to be checked
Rear front passenger's side antenna (interior)

OK: Normal is displayed.

Q: Is the check result normal?

YES : Go to Step 4.
NO :  Replace the inside transmission antenna assembly 

(rear: passenger’s side).

STEP 4. Check whether the diagnostic trouble code is 
reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the 

ON position.

(3) Check if the diagnostic trouble code is set.
Q: Is the diagnostic trouble code set?

YES : Replace KOS-ECU and register the ID codes (Refer 

to 

P.42B-188

).

NO :  Intermittent malfunction is suspected (Refer to 

GROUP 00, How to Use Troubleshooting/Inspection 
Service Points 

− How to cope with Intermittent 

Malfunction 

P.00-15

).

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-84

DTC B2412 Antenna power voltage

CAUTION

• If diagnostic trouble code No. B2412 is set, 

diagnose the CAN bus lines.

• When replacing the ECU, always check that 

the communication circuit is normal.

ACA02758

INSIDE TRANSMISSION 
ANTENNA ASSEMBLY 
(FRONT)

Antenna Assembly Circuit

INSIDE TRANSMISSION 
ANTENNA ASSEMBLY 
(REAR: PASSENGER'S SIDE)

KEYLESS 
OPERATION 
KEY

KOS-ECU

OUTSIDE TRANSMISSION 
ANTENNA ASSEMBLY 
(PASSENGER'S SIDE)

OUTSIDE TRANSMISSION 
ANTENNA ASSEMBLY 
(DRIVER'S SIDE)

OUTSIDE TRANSMISSION 
ANTENNA ASSEMBLY 
(LIFTGATE)

AB

KOS-ECU

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-85

.

DIAGNOSTIC FUNCTION

If KOS-ECU detects an abnormality in power supply 
of the exterior or interior antennas, KOS-ECU sets 
diagnostic trouble code No. B2412.

.

JUDGMENT CRITERIA

If an abnormality in power supply of the outside or 
inside transmission antenna assembly is detected 
when power supply of it is turned on, KOS-ECU 
determines that there is a problem. 

.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• Malfunction of the KOS-ECU

DIAGNOSTIC PROCEDURE

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

AC901076AG

Connector: C-22

AC901075AG

Connector: C-102

AC901079 AW

Connectors: D-101, D-124

D-124

D-101

AC901080AL

Connectors: D-106, D-131

D-106

D-131

AC803008

AC

Connectors: F-14, F-17

F-14 (GR)

F-17

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-86

STEP 1. Using scan tool MB991958, read CAN bus 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 CAN bus lines related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Repair the CAN bus line (Refer to GROUP 54C, CAN 

bus diagnostics table 

P.54C-17

).

NO :  Go to Step 2.

STEP 2. Check KOS-ECU connector C-102 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is KOS-ECU connector C-102 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

.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector