Mitsubishi Evolution X. Manual — part 483

DOOR

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BODY

42A-35

STEP 5. Check the wiring harness between joint connector
(1) connector C-101 (terminal No. 5) and ETACS-ECU
connector C-301 (terminal No. 2), joint connector (3)
connector C-103 (terminal No. 21) and ETACS-ECU
connector C-315 (terminal No. 15).
Q: Are the wiring harness between joint connector (1)

connector C-101 (terminal No. 5) and ETACS-ECU
connector C-301 (terminal No. 2), joint connector (3)
connector C-103 (terminal No. 21) and ETACS-ECU
connector C-315 (terminal No. 15) in good condition?
YES : Go to Step 6.
NO : The wiring harness may be damaged or the connector

may have loose, corroded or damaged terminals, or
terminals pushed back in the connector. Repair the
wiring harness as necessary. Verify that the central
door locking system works normally.

STEP 6. Retest the system.
Check that the central door locking system works normally.
Q: Is the check result normal?

YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. Check that the central door

locking system normally.

DOOR

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BODY

42A-36

INSPECTION PROCEDURE 2: Central Door Locking System does not Operate even when Door Lock
Switch of Power Window Main Switch Operated (Door Lock Switch of Front Power Window Sub
Switch Operate Normally).

CAUTION

Before replacing the ECU, ensure that the power
supply circuit, the ground circuit and the com-
munication circuit are normal.

AC709019

ETACS-ECU

FUSIBLE
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

Central Door Locking System Power Supply Circuit

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-37

.

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 power window main switch may be defective

DIAGNOSTIC PROCEDURE

STEP 1. Checking central door locking system operation
Check that the central door locking system works normally.
Q: Is the check result normal?

YES : Go to Step 2.
NO : Refer to Inspection procedure 1 "Central door locking

system does not work at all

P.42A-31

."

STEP 2. Check power window main switch connector E-15
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is power window main switch connector E-15 in good

condition?
YES : Go to Step 3.
NO : Repair or check the connector. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

. Verify that all

the doors can be locked and unlocked normally.

AC708950AK

C-129 (BR)

C-103 (B)

C-101 (B)

Connectors: C-101, C-103, C-129

AC608167AM

Connector: E-15

DOOR

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BODY

42A-38

STEP 3. Check the power window main switch (door lock
switch).
Remove the power window main switch. Refer to

P.42A-124

.

Q: Does the power window main switch work normally?

YES : Go to Step 4.
NO : Replace the power window main switch. Verify that all

the doors can be locked and unlocked normally.

STEP 4. Check joint connector (1) connector C-101, joint
connector (3) connector C-103 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 in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Check that the sunroof works normally.

STEP 5. Check the wiring harness between power window
main switch connector E-15 (terminals Nos. 13 and 14),
joint connector (3) connector C-103 (terminal No. 20) and
joint connector (1) connector C-101 (terminal No. 4).
NOTE: Also check intermediate connector C-129 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-129 is damaged, repair
or replace the damaged component(s) as described in GROUP
00E, Harness Connector Inspection

P.00E-2

.

Q: Are the wiring harness between power window main

switch connector E-15 (terminals Nos. 13 and 14), joint
connector (3) connector C-103 (terminal No. 20) and
joint connector (1) connector C-101 (terminal No. 4) in
good condition?
YES : Go to Step 6.
NO : The wiring harness may be damaged or the connector

may have loose, corroded or damaged terminals, or
terminals pushed back in the connector. Repair the
wiring harness as necessary. Verify that the central
door locking system works normally.

Switch
position

Tester
connection

Specified
condition

LOCK

14

− Ground

Continuity exists
(2

Ω or less)

UNLOCK

13

− Ground

Continuity exists
(2

Ω or less)

AC609544

ZC600611

Door lock switch

AB