Mitsubishi Evolution X. Manual — part 1082
THEFT ALARM
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CHASSIS ELECTRICAL
54A-689
.
TECHNICAL DESCRIPTION (COMMENT)
If this function does not work normally, the input sig-
nal circuits to the components below, the theft-alarm
indicator, the ETACS-ECU or the CAN bus line may
have a problem.
• Keyless entry transmitter
• Key reminder switch
• Ignition switch (ACC)
• Hood switch
• Door switches
• Trunk latch switch
.
TROUBLESHOOTING HINTS
• CAN bus line may be defective
• Theft-alarm indicator may be defective
• Keyless entry transmitter may be defective
• The key reminder switch may be defective
• Door switch may be defective
• Trunk latch switch may be defective
• Hood switch may be defective
• The KOS-ECU may be defective
• The WCM may be defective
• The ETACS-ECU may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
DIAGNOSIS
Required Special Tools:
• MB992006: Extra fine probe
• MB991223: Harness set
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle 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)
AC708950
Connector: C-103
BO
C-103 (B)
AC708951BC
Connector: C-124
AC708972BA
Connectors: C-307, C-317
ETACS-ECU
C-307 (B)
C-317
THEFT ALARM
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CHASSIS ELECTRICAL
54A-690
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)
(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,
).
STEP 2. Using scan tool MB991958, check for any
diagnostic trouble code.
Check if DTC is set to the KOS-ECU <vehicles with KOS> or
WCM <vehicles with WCM>.
(1) Turn the ignition switch to the "ON" position.
(2) Check whether the KOS or WCM related DTC is set.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES <vehicles with KOS> : Troubleshoot the KOS (Refer
to GROUP 42B, KOS
).
YES <vehicles with WCM> : Troubleshoot the WCM (Refer
to GROUP 42C, WCM
NO : Go to Step 3.
STEP 3. Check the keyless operation key <KOS> or
keyless entry transmitter <WCM>.
Q: is the keyless operation key <KOS> or keyless entry
transmitter <WCM> normally?
YES : Go to Step 4.
NO <vehicles with KOS> : Troubleshoot the KOS (Refer to
).
NO <vehicles with WCM> : Troubleshoot the WCM (Refer
to GROUP 42C, WCM
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
THEFT ALARM
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CHASSIS ELECTRICAL
54A-691
STEP 4. Using scan tool MB991958, check data list.
Use the ETACS-ECU data list to check the signals related to
the theft-alarm function.
• Turn the ignition switch to the "ACC" position.
• Open the hood.
• Turn the ignition switch to the "LOCK" (OFF) position (with
ignition key <vehicles with WCM> or emergency key <vehi-
cles with KOS> inserted).
• Open each door.
• Open the Trunk.
Q: Does scan tool MB991958 display the items "Dr door
ajar switch", "As door ajar switch", "RR door ajar
switch", "RL door ajar switch", "Trunk/gate trunk ajar
switch" , "Handle lock switch", "Hood switch" and "ACC
switch" as normal condition?
YES <Normal conditions are displayed for all items.> :
Go to Step 5.
NO <Normal condition is not displayed for item No.
256.> : Troubleshoot the ETACS-ECU. Refer to diagnosis -
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.> : Troubleshoot the ETACS-ECU. Refer to diagnosis -
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.> : Troubleshoot the ETACS-ECU. Refer to diagnosis -
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.
259.> : Troubleshoot the ETACS-ECU. Refer to diagnosis -
Inspection Procedure 8 "ETACS-ECU does not
receive any signal from the rear door switch (RH)"
.
Item No.
Item name
Normal condition
Item 256
Dr door ajar switch
Open
Item 257
As door ajar switch
Open
Item 258
RR door ajar switch
Open
Item 259
RL door ajar switch
Open
Item 260
Trunk/gate trunk ajar
switch
Open
Item 264
Handle lock switch
Key in
Item 266
Hood switch
OFF
Item 288
ACC switch
ON
THEFT ALARM
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CHASSIS ELECTRICAL
54A-692
NO <Normal condition is not displayed for item No.
260.> : Troubleshoot the ETACS-ECU. Refer to diagnosis -
Inspection Procedure 9 "ETACS-ECU does not
receive any signal from the trunk lid actuator and
switch
NO <Normal condition is not displayed for item No.
264.> : Troubleshoot the ETACS-ECU. Refer to diagnosis -
Inspection Procedure 3 "ETACS-ECU does not
receive any signal from key reminder switch"
.
NO <Normal condition is not displayed for item No.
266.> : Troubleshoot the ETACS-ECU. Refer to Inspection
Procedure 10 "ETACS-ECU does not receive any
signal from the hood switch"
.
NO <Normal condition is not displayed for item No.
288.> : Troubleshoot the ETACS-ECU. Refer to diagnosis -
Inspection Procedure 1 "ETACS-ECU does not
receive any signal from the ignition switch (ACC)
signal"
STEP 5. Check center panel unit connector C-124 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is center panel unit connector C-124 in good condition?
YES : Go to Step 6.
NO : Repair the damaged parts.
STEP 6. Check the theft-alarm indicator.
Refer to
.
Q: Is the theft-alarm indicator in good condition?
YES : Go to Step 7.
NO : Replace the center panel unit.
STEP 7. Check ETACS-ECU connector C-307 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is the ETACS-ECU connector C-307 in good condition?
YES : Go to Step 8.
NO : Repair the damaged parts.
AC609727AB
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