Mitsubishi Outlander GS45X. Manual - part 1138

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-131

TROUBLESHOOTING HINTS

• Damaged wiring harness and connectors

• Malfunction of KOS-ECU

STEP 1. Check KOS-ECU connector C-102 and 
ETACS-ECU connector C-317 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Is the KOS-ECU connector C-102 and ETACS-ECU 

connector C-317 in good condition?
YES : Go to Step 2.
NO :  Repair the defective connector.

STEP 2. Check the wiring harness between the KOS-ECU 
connector C-102 (terminal No. 38, 39) and the ETACS-ECU 
connector C-317 (terminal No. 10, 5) and between the 
KOS-ECU connector C-102 (terminal No. 14) and the body 
ground.

• Check the power supply line for open and short circuit, and 

check the ground line for open circuit.

Q: Is the wiring harness between KOS-ECU connector 

C-102 (terminal No. 38, 39) and the ETACS-ECU 
connector C-317 (terminal No. 10, 5) and between the 
KOS-ECU connector C-102 (terminal No. 14) and the 
body ground in good condition?
YES : Go to Step 3.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary.

STEP 3. Retest the system
Q: Does the abnormality in KOS-ECU power supply and 

ground circuits in good condition?
YES : 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

).

NO :  Replace KOS-ECU and register the ID codes. (Refer 

to 

P.42B-15

.)

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-132

Inspection Procedure 3: Keyless operation warning display does not disappear.

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 CAN bus line

• Malfunction of combination meter

• Damaged wiring harness and connectors

• Malfunction of the 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 (Vehicles with 

CAN communication system)

STEP 1. Using scan tool MB991958, read the diagnostic 
trouble code.
Check the DTC B2415 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 con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect 

scan too (M.U.T.-III) 

P.42B-13

."

(2) Turn the ignition switch to the "ON" position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC B2415 is set?

YES : Refer to 

P.42B-91

.

NO :  Go to Step 2.

STEP 2. Using scan tool MB991958, read the combination 
meter diagnostic trouble code.
Check if DTC is set in the combination meter.
Q: Is the DTC set?

YES : Troubleshoot the combination meter. (Refer to 

GROUP 54A, Diagnosis .)

NO :  Go to Step 3.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-133

STEP 3. Using scan tool MB991958, read the KOS-ECU 
trouble code.
Check if DTC is set to the KOS-ECU.
Q: Is any DTC set?

YES : Refer to 

P.42B-35

.

NO :  Go to Step 4.

STEP 4. Check of the troubles.
Check that the keyless operation warning display turns OFF 
unless the flashing or illumination conditions are met.
Q: Does the warning display operate properly?

YES : 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

).

NO :  Replace KOS-ECU and register the ID codes. (Refer 

to 

P.42B-15

.)

DIAGNOSIS

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KEYLESS OPERATION SYSTEM (KOS)

42B-134

Inspection Procedure 4: IG knob will not turn (keyless operation is not recognized).

CAUTION

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

ACA02761

IMMOBILIZER 
ANTENNA

KEYLESS
ENTRY
RECEIVER

KOS-ECU System Circuit

KOS-ECU

KEY
REMINDER
SWITCH

WHEN
REMOVING
KEY: ON

(PUSH SWITCH)

ETACS-ECU

FUSIBLE
LINK

36

RELAY
BOX

KEYLESS
OPERATION
KEY

KEY ID

TRANSPONDER

RECEIVER
ANTENNA MODULE

AB