Mitsubishi Outlander GS45X. Manual - part 1139

 

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Mitsubishi Outlander GS45X. Manual - part 1139

 

 

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-135

.

TROUBLESHOOTING HINTS

• Configuration function setting

• Damaged wiring harness and connectors

• Malfunctions of the steering lock push switch

• Malfunction of the keyless operation key

• Malfunction of the receiver antenna module

• Malfunction of KOS-ECU

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 (Vehicles with 

CAN communication system)

STEP 1. Check the power supply circuit and the ground 
circuit to KOS-ECU.
Refer to Inspection procedure 2 "Abnormality in KOS-ECU 
power supply and ground circuits" 

P.42B-130

.

Q: Is the power supply circuit and the ground circuit to 

KOS-ECU in good condition?
YES : 
Go to Step 2.
NO :  Repair the power supply circuit and the ground circuit 

to KOS-ECU.

AC702145

C-102

C-30

AG

Connectors: C-30, C-102

AC701632AG

Connector: C-315

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-136

STEP 2. 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 3.
NO :  Repair the CAN bus line. (Refer to GROUP 54C, 

Diagnosis 

P.54C-17

).

STEP 3. 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 4.

STEP 4. Using scan tool MB991958, Check the 
configuration function.
Use the ETACS-ECU configuration function to check that the 
"F.A.S.T. feature" is set to "Both enable" or "ENG strt enable".
Q: Is it set to "Both enable" or "ENG strt enable"?

YES : Go to Step 5.
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

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-137

STEP 5. Check the ignition push switch. Measure the 
resistance at KOS-ECU connector C-102.
(1) Disconnect the KOS-ECU connector C-102.
(2) With the IG knob push switch pressed, measure the 

resistance at the harness-side connector.

(3) Resistance between the KOS-ECU connector C-102 

terminal No. 8 and 34.

OK: The resistance should be 2 

Ω or less.

Q: Is the measured resistance 2 

Ω or less?

YES : Go to Step 6.
NO :  Check the KOS-ECU C-102 connector, the key 

reminder switch connector C-211, the ETACS-ECU 
connector C-317, and the wiring harness between the 
KOS-ECU connector C-102 (terminal No. 8, 34) and 
the C-211 key reminder switch connector (terminal 
No. 10, 4), and repair them if necessary. If they are 
normal, replace the key reminder switch.

STEP 6. Check the key reminder switch. Measure the 
resistance at ETACS-ECU connector C-315.
(1) Disconnect the ETACS-ECU connector C-315.
(2) Measure the resistance at the harness-side connector with 

the ignition key removed from the ignition key cylinder.

(3) Resistance between the ETACS-ECU connector C-315 

terminal No. 13 and the ground.

OK: The resistance should be 2 

Ω or less.

Q: Is the measured resistance 2 

Ω or less?

YES : Go to Step 7.
NO :  Check the key reminder switch connector C-211, the 

ETACS-ECU connector C-315, the wiring harness 
between the key reminder switch connector C-211 
(terminal No. 3) and the ETACS-ECU connector 
C-315 (terminal No. 13), and between the key 
reminder switch connector C-211 (terminal No. 2) and 
the ground. If they are normal, replace the key 
reminder switch.

STEP 7. Check with another registered keyless operation 
key.
Q: Does the IG knob turn? (Is the keyless operation key 

recognized?)
YES : 
Replace the keyless operation key with which the IG 

knob does not turn (no recognition) and register the 
ID codes. (Refer to 

P.42B-15

.)

NO :  Go to Step 8.

AC608812DZ

Harness side: C-102

AC608812

Harness side: C-315

EA

DIAGNOSIS

TSB Revision

KEYLESS OPERATION SYSTEM (KOS)

42B-138

STEP 8. Check KOS-ECU connector C-102 and receiver 
antenna module connector C-30 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Is KOS-ECU connector C-102 and receiver antenna 

module connector C-30 in good condition?
YES : 
Go to Step 9.
NO :  Repair the defective connector.

STEP 9. Check the wiring harness between KOS-ECU 
connector C-102 (terminal No. 11, 12, 32) and receiver 
antenna module connector C-30 (terminal No. 2, 1, 8).
Q: Is the wiring harness between KOS-ECU connector 

C-102 (terminal No. 11, 12, 32) and receiver antenna 
module connector C-30 (terminal No. 2, 1, 8) in good 
condition?
YES : 
Go to Step 10.
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. Verify that 
the high-beam headlights illuminate normally.

STEP 10. Check the power supply circuit to the receiver 
antenna module. Measure the voltage at receiver antenna 
module connector C-30.
(1) Disconnect receiver antenna module connector C-30 and 

measure the voltage available at the harness side of the 
connector.

(2) Measure the voltage between terminal No. 3 and ground.

• The voltage should measure 5 volt.

Q: Is the measured voltage 5 volt?

YES : Go to Step 11.
NO :  Replace KOS-ECU and register the ID codes. (Refer 

to 

P.42B-15

.)

AC608254 BQ

Harness side: C-30

 

 

 

 

 

 

 

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