Mitsubishi Evolution X. Manual - part 543

 

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Mitsubishi Evolution X. Manual - part 543

 

 

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-79

.

DTC SET CONDITION

If an open circuit is detected in the outside transmit-
ter antenna (passenger's side), the DTC is set.

.

TECHNICAL DESCRIPTION (COMMENT)

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.

.

TROUBLESHOOTING HINTS

• Malfunction of the outside transmitter antenna 

assembly (passenger's side)

• Malfunction of the KOS-ECU

• Damaged wiring harness and connectors

DIAGNOSIS

STEP 1. Check KOS-ECU connector C-05 and outside 
transmitter antenna assembly (passenger's side) 
connector D-42 for loose, corroded or damaged terminals, 
or terminals pushed back in the connector.
Q: Are KOS-ECU connector C-05 and outside transmitter 

antenna assembly (passenger's side) connector D-42 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

. Check that the outside transmitter antenna 

assembly (passenger's side) works normally.

AC708954 AP

Connector: D-42

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-80

STEP 2. Check the wiring harness between the KOS-ECU 
connector C-05 (terminal Nos. 6, 18, 40) and outside 
transmitter antenna assembly (passenger's side) 
connector D-42 (terminal Nos. 3, 2, 1) for open circuit.
(1) Disconnect KOS-ECU connector C-05 and outside 

transmitter antenna assembly (passenger's side) connector 
D-42, and check the wiring harness.

(2) Check the wiring harness between KOS-ECU connector 

C-05 (terminal No.6) and outside transmitter antenna 
assembly (passenger's side) connector D-42 (terminal 
No.3).

OK: Continuity exists (2 

 or less)

(3) Check the wiring harness between KOS-ECU connector 

C-05 (terminal No.18) and outside transmitter antenna 
assembly (passenger's side) connector D-42 (terminal 
No.2).

OK: Continuity exists (2 

 or less)

AC709707EW

Harness side: C-05

Harness side: D-42

AC709707 EX

Harness side: C-05

Harness side: D-42

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-81

(4) Check 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).

OK: Continuity exists (2 

 or less)

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

(terminal Nos. 6, 18, 40) and outside transmitter antenna 
assembly (passenger's side) connector D-42 (terminal 
Nos. 3, 2, 1) in good condition?
YES  : 
Go to Step 3.
NO (KOS-ECU connector C-05 terminal No.6 

 outside 

transmitter antenna assembly (passenger's side) 
connector D-42 terminal No.3.) : 
Repair the wiring 

harness between KOS-ECU connector C-05 (terminal 
No.6) and outside transmitter antenna assembly 
(passenger's side) connector D-42 (terminal No.3).

NO (KOS-ECU connector C-05 terminal No.18 

 outside 

transmitter antenna assembly (passenger's side) 
connector D-42 terminal No.2.) : 
Repair the wiring 

harness between KOS-ECU connector C-05 (terminal 
No.18) and outside transmitter antenna assembly 
(passenger's side) connector D-42 (terminal No.2).

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).

AC709707EY

Harness side: D-42

Harness side: C-05

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-82

STEP 3. Check the wiring harness between the outside 
transmitter antenna assembly (passenger's side) 
connector D-42 (terminal Nos. 3, 2, 1) and the ground for 
short circuit.
(1) Disconnect outside transmitter antenna assembly 

(passenger's side) connector D-42, and check the wiring 
harness.

(2) Check the wiring harness between outside transmitter 

antenna assembly (passenger's side) connector D-42 
(terminal No.3) and ground

OK: No continuity

(3) Check the wiring harness between outside transmitter 

antenna assembly (passenger's side) connector D-42 
(terminal No.2) and ground

OK: No continuity

AC709707IF

Harness side: D-42

AC709707IG

Harness side: D-42

 

 

 

 

 

 

 

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