Mitsubishi Evolution X. Manual — part 484

DOOR

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42A-39

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 power window main switch. Check that

the central door locking system normally.

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INSPECTION PROCEDURE 3: Central Door Locking System does not Operate even when Door Lock
Switch of Front Power Window Sub Switch Operated (Door Lock Switch of Power Window Main
Switch Operate Normally).

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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42A-41

.

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 front power window sub 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 front power window sub switch connector
E-08 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is front power window sub switch connector E-08 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.

AC708951AF

C-116

C-24

Connectors: C-24, C-116

AC708950AH

Connectors: C-101, C-103

C-103 (B)

C-101 (B)

AC608168 AI

Connector: E-08

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

P.42A-124

.

Q: Does the front power window sub switch work

normally?
YES : Go to Step 4.
NO : Replace the front power window sub switch. Verify

that all the doors can be locked and unlocked
normally.

STEP 4. Check the ground circuit to the front power
window sub switch. Measure the resistance at front power
window sub switch connector E-08.
(1) Disconnect front power window sub switch connector E-08

and measure the resistance available at the wiring harness
side of the connector.

(2) Measure the resistance value between terminal 4 and

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 5.
NO : Go to Step 6.

Switch
position

Tester
connection

Specified
condition

LOCK

3

− 4

Continuity exists
(2

Ω or less)

UNLOCK

2

− 4

Continuity exists
(2

Ω or less)

AC609543

ZC600610

Door lock switch

AB

AC209731

Connector E-08
(Harness side)

AC208731BZ