Mitsubishi Evolution X. Manual — part 580

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-227

STEP 4. Check the wiring harness between the unlock
sensor (front door: RH) connector E-05 (terminal Nos. 4, 2,
6) and the ground for short circuit.
(1) Disconnect unlock sensor (front door: RH) connector E-05,

and check the wiring harness.

(2) Check the wiring harness between unlock sensor (front

door: RH) connector E-05 (terminal No. 4) and ground

OK: No continuity

(3) Check the wiring harness between unlock sensor (front

door: RH) connector E-05 (terminal No. 2) and ground

OK: No continuity

(4) Check the wiring harness between unlock sensor (front

door: RH) connector E-05 (terminal No.6) and ground.

OK: No continuity

Q: Is the wiring harness between unlock sensor (front

door: RH) connector E-05 (terminal Nos. 4, 2, 6) and the
ground in good condition?
YES : Go to Step 5.
NO [unlock sensor (front door: RH) connector E-05
terminal No.4

− ground.] : Repair the wiring harness

between unlock sensor (front door: RH) connector
E-05 (terminal No.4) and ground.

NO [unlock sensor (front door: RH) connector E-05
terminal No.2

− ground.] : Repair the wiring harness

between unlock sensor (front door: RH) connector
E-05 (terminal No.2) and the ground.

NO [unlock sensor (front door: RH) connector E-05
terminal No.6

− ground.] : Repair the wiring harness

between unlock sensor (front door: RH) connector
E-05 (terminal No.6) and the ground.

AC709707IT

Harness side: E-05

AC709707IU

Harness side: E-05

AC209731

AC208731CQ

Harness side: E-05

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-228

STEP 5. KOS communication test
Using scan tool (M.U.T-III), perform the antenna communica-
tion test to check that the exterior transmitter antenna (passen-
ger's side) communicates normally (Refer to

P.42B-265

).

Q: Is the check result normal?

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

code No. B240B (Refer to

P.42B-78

).

STEP 6. Check of the troubles
Operate the unlock sensor (front door: RH) and check that the
door can be locked.
Q: Is the check result normal?

YES : The diagnosis is complete.
NO : Replace KOS-ECU and register the ID codes (Refer

to

P.42B-12

).

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-229

Inspection Procedure 13: Trunk lid opener switch does not work.

CAUTION

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

AC609043

KOS-ECU

TRUNK LID

OPENER

SWITCH

RED

BLUE- YELLO

W

BLUE- YELLO

W

BLUE- YELLO

W

BLA

CK

BLA

CK

Trunk Lid Opener Switch Circuit

AC

AC708950AW

C-42

Connectors: C-05, C-42

C-05

AC708955AL

Connector: D-17

D-17 (BR)

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-230

.

TROUBLESHOOTING HINTS

• Malfunction of the exterior transmitter antenna

assembly (trunk lid)

• Malfunction of the trunk lid opener switch

• Damaged wiring harness and connectors

• Malfunction of the KOS-ECU

DIAGNOSIS

Required Special Tools:

• MB992006: Extra fine probe

• MB991223: Harness set

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

• MB991824: Vehicles Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

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-10

."

(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

P.42B-20

.

NO : Go to Step 2.

AC708970AG

Connectors: F-09, F-27

F-09

F-27

AC608435

Data link connector

MB991827

MB991824

MB991910

AB