Mitsubishi Evolution X. Manual - part 550

 

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Mitsubishi Evolution X. Manual - part 550

 

 

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-107

(6) Check the wiring harness between outside transmitter 

antenna assembly (trunk lid) connector F-20 (terminal No.3) 
and ground

OK: No continuity

Q: Is the wiring harness between each inside and outside 

antenna and the ground in good condition?
YES  : 
Go to Step 5.
NO [outside transmitter antenna assembly (driver's 
side) connector D-23 terminal No.1 

 ground.] : Repair 

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

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

 ground.] : Repair 

the wiring harness between outside transmitter 
antenna assembly (passenger's side) connector D-42 
(terminal No.1) and the ground.

NO [inside transmitter antenna assembly (front) 
connector C-121 terminal No.1 

 ground.] : Repair the 

wiring harness between inside transmitter antenna 
assembly (front) connector C-121 (terminal No.1) and 
the ground.

NO [inside transmitter antenna assembly (rear) 
connector F-02 terminal No.1 

 ground.] : Repair the 

wiring harness between inside transmitter antenna 
assembly (rear) connector F-02 (terminal No.1) and 
the ground.

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

 ground.] : Repair the 

wiring harness between outside transmitter antenna 
assembly (trunk lid) connector F-20 (terminal No.3) 
and the ground.

STEP 5. Check whether the diagnostic trouble code is 
reset.
(1) Erase the DTC.
(2) Turn the ignition switch from the LOCK (OFF) position to the 

ON position.

(3) 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 diagnosis is complete.

AC709707IK

Harness side: F-20

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-108

DTC B2413: STL unit power voltage

CAUTION

• If DTC B2413 is set in the steering lock unit, 

diagnose the CAN bus lines. If there is any 
fault in the CAN bus lines, an incorrect diag-
nostic trouble code may be set. In this case, 
the set DTC is not highly reliable.

• Whenever the steering lock unit (integrated in 

the key reminder switch) is replaced, ensure 
that the communication circuit is normal.

.

DTC SET CONDITION

If KOS-ECU detects an abnormality in power supply 
of the steering lock unit, KOS-ECU sets DTC B2413.

.

TECHNICAL DESCRIPTION (COMMENT)

If an abnormality in power supply of the steering lock 
unit is detected when power supply of it is turned on, 
KOS-ECU determines that there is a problem. 

.

TROUBLESHOOTING HINTS

• Damaged wiring harness and connectors

• Malfunction of the steering lock unit (integrated 

into the key reminder switch)

• Malfunction of the KOS-ECU

Key Reminder Switch and KOS-ECU Circuit

KOS-ECU

KEY
REMINDER
SWITCH

AC708950AZ

Connector: C-05

AC708953AC

Connector: C-211

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-109

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

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.

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) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

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

Diagnosis 

P.54C-14

).

STEP 2. Check key reminder switch connector C-211 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is tye key reminder switch connector C-211 in good 

condition?
YES : 
Go to Step 3.
NO :  Repair the defective connector.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-110

STEP 3. Check the power supply circuit to the key 
reminder switch. Measure the voltage at C-211 key 
reminder switch connector.
NOTE: Check the power supply line for open circuit and short 
circuit.
(1) Disconnect the connector, and measure at the harness 

side.

(2) Turn the ignition push switch to the ON position.
(3) Measure the voltage between the key reminder switch 

connector terminal No. 9 and ground.

OK: 5 

± 0.5 V

Q: Is the measured voltage 5 

± 0.5 volts?

YES : Go to Step 4.
NO :  Check the KOS-ECU connector C-05 and the wiring 

harness between the KOS-ECU connector C-05 
(terminal No. 5) and the key reminder switch 
connector C-211 (terminal No. 9), and repair them 
if necessary. If it is normal, replace KOS-ECU and 
register the ID codes. (Refer to 

P.42B-12

.)

STEP 4. Check KOS-ECU connector C-05 for loose, 
corroded or damaged terminals, or terminals pushed back 
in the connector .
Q: Is the KOS-ECU connector C-05 in good condition?

YES : Go to Step 5.
NO :  Repair the defective connector.

STEP 5. Check the wiring harness between the C-211 key 
reminder switch connector (terminal Nos. 11) and the 
ground for short circuit.
(1) Disconnect C-211 key reminder switch connector, and 

check the wiring harness.

(2) Check the wiring harness between C-211 key reminder 

switch connector (terminal No.11) and ground

OK: No Continuity

Q: Is the wiring harness between C-211 key reminder 

switch connector C-211 (terminal No. 11) and the ground 
in good condition?
YES  : 
Go to Step 6.
NO (key reminder switch connector C-211 terminal No.9 
 ground.) : Repair the wiring harness between C-211 key 

reminder switch connector (terminal No. 11) and the 
ground.

AC608254 CY

Harness side: C-211

AC709703AH

Harness side: C-211

 

 

 

 

 

 

 

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