Mitsubishi Evolution X. Manual - part 1082

THEFT ALARM

TSB Revision

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

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)

P.54A-685

(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,

Diagnosis

P.54C-14

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

P.42B-20

YES <vehicles with WCM> : Troubleshoot the WCM (Refer

to GROUP 42C, WCM

P.42C-14

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

GROUP 42B, KOS

P.42B-20

NO <vehicles with WCM> : Troubleshoot the WCM (Refer

to GROUP 42C, WCM

P.42C-14

AC608435

Data link connector

MB991827

MB991824

MB991910

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)"

P.54A-654

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)"

P.54A-656

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)"

P.54A-658

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)"

P.54A-661

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

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

P.54A-663

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"

P.54A-644

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"

P.54A-670

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"

P.54A-640

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

P.54A-706

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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