Mitsubishi Outlander GS45X. Manual - part 1140

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-139

STEP 11. Using the oscilloscope, check the waveform at 
receiver antenna module connector C-30 and ground by 
backprobing.
(1) Do not disconnect the receiver antenna module connector 

C-30.

(2) Connect an oscilloscope to receiver antenna module 

connector C-30 terminal No. 3 and ground by backprobing.

(3) Turn the ignition switch to the "LOCK" (OFF) position.

• Check the waveform.

Q: Is the waveform normal?

YES : Go to Step 12.
NO :  Replace the receiver antenna module.

STEP 12. Check of the troubles.
Check that the IG turns (keyless operation is recognized).
Q: Does the IG knob will not turn (keyless operation is not 

recognized) in good condition?
YES : The procedure is complete.
NO :  Replace KOS-ECU and register the ID codes. (Refer 

to 

P.42B-15

.)

Inspection Procedure 5: The engine will not start with KOS (IG knob operates normally).

CAUTION

Before replacing the ECU, ensure that the com-
munication circuit is normal.

.

TROUBLESHOOTING HINTS

• The CAN bus line is defective.

• Malfunction of the MFI system

• Function setting error or no setting with customi-

zation

• VIN not written or unmatched

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 (Vehicles with 

CAN communication system)

AC602456

0V

5.0V

AC

Normal waveform

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-140

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 con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the 

Scan Tool (M.U.T.-III) 

P.42B-13

."

(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-17

).

STEP 2. Using scan tool MB991958, read the KOS-ECU 
diagnostic trouble code.
Check if DTC is set to the KOS-ECU.
Q: Is the DTC set?

YES : Troubleshoot the KOS. (Refer to 

P.42B-35

.)

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, Check the 
configuration function.
Use the ETACS-ECU configuration function to check that the 
"KOS feature" is set to "Both enable" or "ENG strt enable".
(1) Turn the ignition switch to the "ON" position.
(2) Use the ETACS-ECU configuration function to check that 

the "F.A.S.T. feature" is set to "Both enable" or "ENG strt 
enable".

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is it set to "Both enable" or "ENG strt enable"?

YES : Go to Step 4.
NO :  Use the ETACS-ECU configuration function to set the 

"F.A.S.T. feature" to "Both enable" or "ENG strt 
enable". (Refer to 

P.54A-821

.)

STEP 4. Check that the engine starts.
Q: Does the engine start?

YES : The procedure is complete.
NO :  Refer to GROUP 13A 

− Diagnosis 

P.13A-49

 <2400> 

or GROUP 13B 

− Diagnosis 

P.13B-50

 <3000>.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-141

Inspection Procedure 6: No door will be locked or unlocked by operating a lock/unlock switch on any 
door.

CAUTION

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

.

TROUBLESHOOTING HINTS

• Malfunction of the CAN bus lines

• Malfunction of the central door locking system

• Malfunction of the keyless operation key

• Malfunction of the key reminder switch

• Damaged wiring harness and connectors

• Malfunction of the KOS-ECU

• Function setting error or no setting with a custom-

ization

AC609048

KEY
REMINDER
SWITCH

WHEN 
REMOVING 
KEY: ON

ETACS-ECU

RED

-

WHITE

BL

ACK

BL

ACK

BL

ACK

BL

ACK

 ETACS-ECU and Key Reminder Switch Circuit

AB

AC608152 AL

Connector: C-315

Junction block

AC900844

Connector: C-213

AT

C-213 (R)

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-142

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 CAN bus 
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-13

."

(2) Turn the ignition switch to the "ON" position.
(3) Check whether the CAN bus lines related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Repair the CAN bus line (Refer to GROUP 54C, CAN 

bus diagnostics table 

P.54C-16

).

NO :  Go to Step 2.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB