Mitsubishi Evolution X. Manual — part 582
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-235
.
TECHNICAL DESCRIPTION (COMMENT)
The receiver antenna module assembly lock and
unlock signals from the keyless operation key, and
sends them to KOS-ECU, and further to
ETACS-ECU. Also, when ETACS receives signals
from the key reminder switch and all the door
switches, ETACS-ECU judges them to activate the
keyless entry system.
.
TROUBLESHOOTING HINTS
• Malfunction of CAN bus line
• Malfunction of the door switches
• Malfunction of the key reminder switch
• Malfunction of the receiver antenna assembly
• Malfunction of the keyless operation key
• Damaged wiring harness and connectors
• Malfunction of the KOS-ECU
• Malfunction of ETACS-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
AC708955AM
Connector: D-14
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-236
STEP 1. Using scan tool MB991958, read CAN bus the
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)
(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,
).
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-237
STEP 2. Using scan tool MB991958, read the 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)
(2) Turn the ignition switch to the "ON" position.
(3) Check whether the KOS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Diagnose the KOS-ECU. Refer to
.
NO : Go to Step 3.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DIAGNOSIS
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KEYLESS OPERATION SYSTEM (KOS)
42B-238
STEP 3. Using scan tool MB991958, check data list.
Check the signals related to the keyless entry system opera-
tion.
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)
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Check the ETACS data list.
• Close the driver's door.
• Close the passenger's door.
• Close the RH-side rear door.
• Close the LH-side rear door.
• Remove the ignition key from the ignition key cylinder.
OK: Normal condition are displayed.
Q: Are the check result normal?
YES <Normal conditions are displayed for all the
items.> : Go to Step 4.
NO <Normal condition is not displayed for item No.
256.> : Refer to GROUP 54A, Inspection Procedure 5:
ETACS-ECU does not receive any signal from the
front door switch (LH)
.
NO <Normal condition is not displayed for item No.
257.> : Refer to GROUP 54A, Inspection Procedure 6:
ETACS-ECU does not receive any signal from the
front door switch (RH)
.
NO <Normal condition is not displayed for item No.
258.> : Refer to GROUP 54A, Inspection Procedure 8:
ETACS-ECU does not receive any signal from the
rear door switch (RH)
NO <Normal condition is not displayed for item No.
259.> : Refer to GROUP 54A, Inspection Procedure 7:
ETACS-ECU does not receive any signal from the
rear door switch (LH)
NO <Normal condition is not displayed for item No.
260.> : Refer to GROUP 54A, Inspection Procedure 9:
ETACS-ECU does not receive any signal from the
trunk lid latch.
Item No.
Item name
Normal
condition
Item 256
Dr door ajar switch
Close
Item 257
As door ajar switch
Close
Item 258
RR door ajar switch
Close
Item 259
RL door ajar switch
Close
Item 260
Trunk/gate trunk ajar switch Close
Item 264
Handle lock switch
Key in
→ Key out
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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