Mitsubishi Evolution X. Manual - part 549

 

  Index      Mitsubishi     Mitsubishi Evolution X - service repair manual 2008 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  547  548  549  550   ..

 

 

Mitsubishi Evolution X. Manual - part 549

 

 

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-103

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.

STEP 2. Check KOS-ECU connector C-05 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector.
Q: Is KOS-ECU connector C-05 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 inside and outside antenna 

works normally.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-104

STEP 3. Check the wiring harness between the KOS-ECU 
connector C-05 (terminal No. 40) and each inside and 
outside antenna for open circuit.
(1) Disconnect KOS-ECU connector C-05 and each inside and 

outside antenna, and check the wiring harness.

(2) Wiring harness between KOS-ECU connector C-05 

(terminal No. 40) and outside transmitter antenna assembly 
(driver's side) D-23 connector (terminal No. 1)

OK: Continuity exists (2 

 or less)

(3) Wiring harness between KOS-ECU connector C-05 

(terminal No. 40) and outside transmitter antenna assembly 
(passenger's side) connector D-42 (terminal No. 1)

OK: Continuity exists (2 

 or less)

(4) Wiring harness between KOS-ECU connector C-05 

(terminal No. 40) and inside transmitter antenna (front) 
connector C-121 (terminal No. 1)

OK: Continuity exists (2 

 or less)

(5) Wiring harness between KOS-ECU connector C-05 

(terminal No. 40) and inside transmitter antenna (rear) 
connector F-02 (terminal No. 1)

OK: Continuity exists (2 

 or less)

AC709707EV

Harness side: D-23

Harness side: C-05

AC709707EY

Harness side: D-42

Harness side: C-05

AC709707

Harness side: C-121

Harness side: C-05

FP

AC709707GG

Harness side: F-02

Harness side: C-05

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-105

(6) Wiring harness between KOS-ECU connector C-05 

(terminal No. 40) and outside transmitter antenna assembly 
(trunk lid) connector F-20 (terminal No. 3)

OK: Continuity exists (2 

 or less)

Q: Is the wiring harness between KOS-ECU connector C-05 

(terminal No. 40) and each inside and outside antenna in 
good condition?
YES  : 
Go to Step 4.
NO (KOS-ECU connector C-05 terminal No.40 

 outside 

transmitter antenna assembly (driver's side) connector 
D-23 terminal No.1.) : 
Repair the wiring harness between 

KOS-ECU connector C-05 (terminal No.40) and 
outside transmitter antenna assembly (driver's side) 
connector D-23 (terminal No.1).

NO (KOS-ECU connector C-05 terminal No.40 

 outside 

transmitter antenna assembly (passenger's side) 
connector D-42 terminal No.1.) : 
Repair the wiring 

harness between KOS-ECU connector C-05 (terminal 
No.40) and outside transmitter antenna assembly 
(passenger’s side) connector D-42 (terminal No.1).

NO (KOS-ECU connector C-05 terminal No.40 

 inside 

transmitter antenna assembly (front) connector C-121 
terminal No.1.) : 
Repair the wiring harness between 

KOS-ECU connector C-05 (terminal No.40) and 
outside transmitter antenna assembly (front) 
connector C-121 (terminal No.1).

NO (KOS-ECU connector C-05 terminal No.40 

 inside 

transmitter antenna assembly (rear) connector F-02 
terminal No.1.) : 
Repair the wiring harness between 

KOS-ECU connector C-05 (terminal No.40) and 
outside transmitter antenna assembly (rear) 
connector F-02 (terminal No.1).

NO (KOS-ECU connector C-05 terminal No.40 

 outside 

transmitter antenna assembly (trunk lid) connector F-20 
terminal No.3.) : 
Repair the wiring harness between 

KOS-ECU connector C-05 (terminal No.40) and 
outside transmitter antenna assembly (trunk lid) 
connector F-20 (terminal No.3).

AC709707FI

Harness side: F-20

Harness side: C-05

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-106

STEP 4. Check the wiring harness between the each inside 
and outside antenna and the ground for short circuit.
(1) Disconnect each inside and outside antenna, and check the 

wiring harness.

(2) Check the wiring harness between outside transmitter 

antenna assembly (driver's side) connector D-23 (terminal 
No.1) and ground

OK: No continuity

(3) Check the wiring harness between outside transmitter 

antenna assembly (passenger's side) connector D-42 
(terminal No.1) and ground

OK: No continuity

(4) Check the wiring harness between inside transmitter 

antenna assembly (front) connector C-121 (terminal No.1) 
and ground

OK: No continuity

(5) Check the wiring harness between inside transmitter 

antenna assembly (rear) connector F-02 (terminal No.1) 
and ground

OK: No continuity

AC709707IE

Harness side: D-23

AC709707IH

Harness side: D-42

AC709707IN

Harness side: C-121

AC709707IQ

Harness side: F-02

 

 

 

 

 

 

 

Content   ..  547  548  549  550   ..