Mitsubishi Evolution X. Manual - part 555

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-127

STEP 7. Check the wiring harness between the receiver 
antenna module connector C-08 (terminal Nos. 2, 1, 8, 12) 
and the ground for short circuit.
(1) Disconnect reciever anntena module connector C-08, and 

check the wiring harness.

(2) Check the wiring harness between reciever anntena 

module connector C-08 (terminal No.2) and ground

OK: No continuity

(3) Check the wiring harness between reciever anntena 

module connector C-08 (terminal No.1) and ground

OK: No continuity

(4) Check the wiring harness between reciever anntena 

module connector C-08 (terminal No.8) and ground

OK: No continuity

AC709707HK

Harness side: C-08

AC709707GA

Harness side: C-08

AC709707HL

Harness side: C-08

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-128

(5) Check the wiring harness between reciever anntena 

module connector C-08 (terminal No.12) and ground

OK: No continuity

Q: Is the wiring harness between receiver antenna module 

connector C-08 (terminal Nos. 2, 1, 8, 12) and the ground 
in good condition?
YES  : Go to Step 8.
NO (receiver antenna module connector C-08 terminal 
No.2 

− ground.) : Repair the wiring harness between 

receiver antenna module connector C-08  (terminal 
No. 2) and the ground.

NO (receiver antenna module connector C-08 terminal 
No.1 

− ground.) : Repair the wiring harness between 

receiver antenna module connector C-08  (terminal 
No. 1) and the ground.

NO (receiver antenna module connector C-08 terminal 
No.8 

− ground.) : Repair the wiring harness between 

receiver antenna module connector C-08  (terminal 
No. 8) and the ground.

NO (receiver antenna module connector C-08 terminal 
No.12 

− ground.) : Repair the wiring harness between 

receiver antenna module connector C-08  (terminal 
No. 12) and the ground.

STEP 8. Replace the receiver antenna module, and check 
whether the diagnostic trouble code is reset.
(1) Turn the ignition switch from the "LOCK" (OFF) position to 

the "ON" position.

(2) Check if the DTC is set.
Q: Is the DTC set?

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

to 

P.42B-12

).

NO :  The procedure is complete.

AC709707HM

Harness side: C-08

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-129

DTC B2416: ECU internal error

.

DTC SET CONDITION

KOS-ECU sets DTC B2416 when it determines itself 
to be in abnormal status.

.

TECHNICAL DESCRIPTION (COMMENT)

KOS-ECU determines that the abnormality is 
present, if the data abnormality is found when the 
ignition switch is turned ON and then EEPROM is 
written.

.

TROUBLESHOOTING HINTS

Malfunction of KOS-ECU

DIAGNOSIS

Required Special Tools:

• 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

Recheck for diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU.

CAUTION

To prevent damage to scan tool (MB991958), always turn 
the ignition switch to the "LOCK" (OFF) position before 
connecting or disconnecting scan tool (MB991958).
(1) Connect scan tool MB991958 to the data link connector.
(2) Erase the DTC.
(3) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(4) Check if DTC is set.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

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

to 

P.42B-12

).

NO :  The trouble can be an intermittent malfunction (Refer 

to GROUP 00 

− How to use 

Troubleshooting/inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-15

).

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-130

DTC C1608: EEPROM Error

CAUTION

If there is any problem in the CAN bus lines, an incorrect 
diagnostic trouble code may be set. Prior to this diagno-
sis, diagnose the CAN bus lines (Refer to GROUP 54C, 
Trouble code diagnosis 

P.54C-14

).

.

DTC SET CONDITION

KOS incorporates EEPROM (nonvolatile memory), and that 
EEPROM stores the TPMS, KOS and immobilizer information. 
When the data in EEPROM is failed, this code is set.

.

TROUBLESHOOTING HINTS

The most likely causes for this DTC to set are:

• Damaged wiring harness and connector

• Malfunction of KOS-ECU

DIAGNOSIS

Required Special Tools:

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

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

• MB991827 M.U.T.-III USB Cable

• MB991910 M.U.T.-III Main Harness A 

STEP 1. M.U.T.-III CAN bus diagnostics
Use scan tool to diagnose the CAN bus lines.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the CAN bus lines (Refer to GROUP 54C 

− 

CAN Bus Diagnostics table 

P.54C-9

). On completion, 

go to Step 2.

STEP 2. Diagnostic trouble code check
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC C1608 set?

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

(Refer to 

P.42B-265

). Then go to Step 3.

NO :  The procedure is complete.

STEP 3. Diagnostic trouble code check
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC C1608 set?

YES : Start over at Step 1.
NO :  The procedure is complete.