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

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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

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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

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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