Mitsubishi Outlander GS45X. Manual — part 1124

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-75

DTC B240C Liftgate antenna(outdoor) open

CAUTION

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

ACA02757

KOS-ECU

KEYLESS
OPERATION
KEY

OUTSIDE TRANSMISSION
ANTENNA ASSEMBLY
(LIFTGATE)

SKY BLUE

SKY BLUE

SKY BLUE

SKY BLUE

RED- BLA

CK

RED- BLA

CK

RED- BLA

CK

RED- BLA

CK

ORANGE

ORANGE

ORANGE

Outside Transmission Antenna assembly (Liftgate) Circuit

AB

AC901076AG

Connector: C-22

AC901075AF

Connectors: C-32, C-102

C-32

C-102

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-76

.

DIAGNOSTIC FUNCTION

If an open circuit is detected in the exterior transmit-
ter antenna (liftgate), the diagnostic trouble code is
set.

.

JUDGMENT CRITERIA

When the ignition push switch is pressed, or when
the antenna open circuit detection request is
received from the diagnosis function, the failure is
detected.

.

PROBABLE CAUSES

• Malfunction of the outside transmission antenna

assembly (liftgate)

• Malfunction of the KOS-ECU

• Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Check KOS-ECU connector C-102 and outside
transmission antenna assembly (liftgate) connector F-14
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are KOS-ECU connector C-102 and outside

transmission antenna assembly (liftgate) connector
D-101 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

.

STEP 2. Check the wiring harness between KOS-ECU
connector C-102 (terminal Nos. 6, 19 and 40) and outside
transmission antenna assembly (liftgate) connector
F-14(terminal Nos. 1, 2 and 3).

• Check the communication, power supply, and ground wires

for open circuit.

NOTE: Also check intermediate connectors C-22, C-32 and
F-17 for loose, corroded, or damaged terminals, or terminals
pushed back in the connector. If intermediate connectors C-22,
C-32 and F-17 is damaged, repair or replace the damaged
component(s) as described in GROUP 00E, Harness Connec-
tor Inspection

P.00E-2

.

Q: Is the wiring harness between KOS-ECU connector

C-102 (terminal Nos. 6, 19 and 40) and outside
transmission antenna assembly (liftgate) connector
F-14(terminal Nos. 1, 2 and 3) in good condition?
YES : Go to Step 3.
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.

AC803008

AC

Connectors: F-14, F-17

F-14 (GR)

F-17

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-77

STEP 3. Keyless operation system communication test
Check that the communication with the outside transmission
antenna assembly (liftgate) is normal (Refer to Antenna Test

P.42B-197

).

Antennas to be checked
liftgate side antenna (exterior)

OK: Normal is displayed.

Q: Is the check result normal?

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

(liftgate).

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-78

DTC B240D Front antenna(indoor) open

CAUTION

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

AC609424

KOS-ECU

KEYLESS
OPERATION
KEY

SKY BLUE

SKY BLUE

SKY BLUE

RED- BLA

CK

RED- BLA

CK

RED- BLA

CK

BLUE

BLUE

Inside Transmission Antenna assembly (Front) Circuit

AG

INSIDE TRANSMISSION

ANTENNA ASSEMBLY

(FRONT)

AC901076AG

Connector: C-22

AC901075AG

Connector: C-102