Mitsubishi Evolution X. Manual — part 482
DOOR
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BODY
42A-31
SYMPTOM PROCEDURES <CENTRAL DOOR LOCKING SYSTEM>
INSPECTION PROCEDURE 1: Central Door Locking System does not work at All.
CAUTION
Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.
AC709019
ETACS-ECU
LINK
37
DOOR
LOCK
RELAY
DRIVER'S
DOOR
UNLOCK
RELAY
PASSENGER'S
DOOR
UNLOCK
RELAY
RED
RED
FRONT DOOR LOCK ACTUATOR OR
REAR DOOR LOCK ACTUATOR
AB
POWER
WINDOW
MAIN
SWITCH
JOINT
CONNECTOR
(3)
JOINT
CONNECTOR
(1)
DOOR
LOCK
SWITCH
DOOR
LOCK
SWITCH
BLACK
BLACK
BLACK
BLACK
YELLOW
YELLOW -RED
GRAY
GRAY
YELLOW -RED
YELLOW -RED
YELLOW -RED
GRAY
GRAY
GRAY
FRONT
POWER
WINDOW
SUB SWITCH
DOOR
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BODY
42A-32
.
CIRCUIT OPERATION
• The ETACS-ECU controls the central door lock
system, locking or unlocking all the doors by acti-
vating the central door lock relay (built into the
ETACS-ECU). The ETACS-ECU uses inputs from
the following components:
• Door lock actuator
• Door lock switch, which is incorporated in the
power window main switch or power window
sub switch
.
TROUBLESHOOTING HINTS
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
• The ETACS-ECU may be defective
DIAGNOSTIC PROCEDURE
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
STEP 1. Checking keyless entry system operation
Check that the keyless entry system works normally.
Q: Is the check result normal?
YES : Go to Step 2.
NO <Vehicles with KOS> : Refer to GROUP 42B,
Inspection procedure 14 "Keyless entry system does
not work at all
NO <Vehicles with WCM> : Refer to GROUP 42C,
Inspection procedure 5 "Keyless entry system does
not work at all
."
AC708950AH
Connectors: C-101, C-103
C-103 (B)
C-101 (B)
AC708972AK
Connectors: C-301, C-315
ETACS-ECU
C-301
C-315
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42A-33
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 ETACS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Diagnose the ETACS-ECU. Refer to GROUP 54A,
Diagnostic trouble code chart
.
NO : Go to Step 3.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
DOOR
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BODY
42A-34
STEP 3. Using scan tool MB991958, check data list.
Check the signals related to the central door locking system
operation.
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) Check the data list of the ETACS.
• Turn the door lock switch (power window main switch or
front power window sub switch) to the lock direction.
• Turn the door lock switch (power window main switch or
front power window sub switch) to the unlock direction.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
OK: Normal conditions are displayed for all items.
Q: Are the check result normal?
YES : Go to Step 4.
NO : Refer to GROUP 54A
− Inspection procedure 4 "The
front door lock actuator (driver’s side) signal is not
received
."
STEP 4. Check joint connector (1) connector C-101, joint
connector (3) connector C-103, ETACS-ECU connector
C-301 and C-315 for loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Q: Are joint connector (1) connector C-101, joint connector
(3) connector C-103, ETACS-ECU connector C-301 and
C-315 in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Check that the sunroof works normally.
Item No.
Item name
Normal
condition
270
Dr door lock switch
Lock
271
Dr door unlock
switch
Not unlock
Item No.
Item name
Normal
condition
270
Dr door lock switch
Not lock
271
Dr door unlock
switch
Unlock
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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