Mitsubishi Montero (2002-2004). Manual — part 257

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-75

Door lock function

.

Operating the driver’s or front passenger’s door lock key
cylinder
When you insert the ignition key to the driver’s or front passen-
ger’s door lock key cylinder and turn the key clockwise to lock
the door, the ETACS-ECU energizes its door lock relay for 0.5
second to activate all the door lock actuators. Then all the
doors will be locked.

.

Operating the driver’s or front passenger’s door lock
switch
When the door is locked by driver’s or front passenger’s door
lock switch, the ETACS-ECU energizes its door lock relay for
0.5 second to activate all the door lock actuators. Then all the
doors will be locked.

.

Operating the driver’s door inside lock knob
When the door is locked by driver's door inside lock knob, the
ETACS-ECU energizes its door lock relay for 0.5 second to
activate all the door lock actuators. Then all the doors will be
locked.

AC203730AB

ON

(LOCK)

OFF

DRIVER'S OR
PASSENGER'S
DOOR LOCK
KEY CYLINDER
SWITCH

0.5 second

OFF

ON

LOCK RELAY
OUTPUT

ALL DOOR'S
LOCK
ACTUATOR

UNLOCK

LOCK

AC203009

ON(LOCK)

ON(UNLOCK)

OFF

t: 0.5 second

OFF

ON

DRIVER'S OR
FRONT
PASSENGER'S
DOOR LOCK
SWITCH

LOCK RELAY
OUTPUT

ALL DOOR'S
LOCK ACTUATOR

UNLOCK

LOCK

AC

t

AC202980AC

UNLOCK

LOCK

t: 0.5 second

OFF

ON

UNLOCK

LOCK

t

DRIVER'S DOOR
INSIDE LOCK KNOB

LOCK RELAY OUTPUT

ALL DOOR'S LOCK
ACTUATOR

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-76

Door unlock function

.

Operating the driver’s door lock key cylinder
When you insert the ignition key to the driver’s door lock key
cylinder and turn the key counterclockwise to unlock the door,
the ETACS-ECU energizes its door unlock relay for 0.5 second
to activate only the driver’s door lock actuator. Then only the
driver’s door will be unlocked.
When you turn the key counterclockwise again, the ETACS-
ECU energizes its door unlock relay for 0.5 second to activate
all the door lock actuator. Then all the doors will be unlocked.

.

Operating the front passenger’s door lock key cylinder
When you insert the ignition key to the front passenger’s door
lock key cylinder and turn the key counterclockwise to unlock
the door, the ETACS-ECU energizes its door unlock relay for
0.5 second to activate all the door lock actuators. Then all the
doors will be unlocked.

.

Operating the driver’s or front passenger’s door lock
switch
When the door is unlocked by driver’s or front passenger's door
lock switch, the ETACS-ECU energizes its door unlock relay for
0.5 second to activate all the door lock actuators. Then all the
doors will be unlocked.

.

AC200017AD

ON

(UNLOCK)

OFF

DRIVER'S
DOOR LOCK
KEY CYLINDER
SWITCH

t: 0.5 second

BACK DOOR
LOCK
ACTUATOR

OFF

ON

UNLOCK RELAY
OUTPUT

LOCK

UNLOCK

LOCK

UNLOCK

DRIVER'S
DOOR LOCK
ACTUATOR

UNLOCK

LOCK

t

PASSESNGER'S
DOOR LOCK
ACTUATOR

t

AC203005AC

ON(UNLOCK)

OFF

ON

OFF

FRONT
PASSENGER'S
DOOR LOCK KEY
CYLINDER SWITCH

UNLOCK RELAY
OUTPUT

t: 0.5 second

t

ALL DOOR'S LOCK
ACTUATOR

UNLOCK

LOCK

AC203006AC

DRIVER'S OR
FRONT PASSENGER'S
DOOR LOCK
SWITCH

UNLOCK RELAY
OUTPUT

ON(LOCK)

ON(UNLOCK)

ON

OFF

t

t: 0.5 second

OFF

UNLOCK

LOCK

ALL DOOR'S LOCK
ACTUATOR

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-77

Forgotten Key Prevention Function
If the driver's door is opened with the ignition key
inserted in the ignition key cylinder and then locked
(i.e., the unlock switch integrated in the driver's door
lock actuator is off, and the lock switch is on), the
ETACS-ECU turns on the unlock relay for 0.5 second

after approximately 0.3 second. This prevents the
door from being locked unintentionally. If the system
fails to unlock the door, the ETACS-ECU try to turn
on the unlock relay five times in maximum for 0.5
second every one second.

NOTE: The dotted line indicates that the system is
trying to turn on the unlock relay if the door can not
be unlocked.

AC101499 AE

KEY REMINDER

SWITCH

DRIVER'S DOOR

SWITCH

DRIVER'S DOOR LOCK

ACTUATOR SWITCH

LOCK

UNLOCK

LOCK RELAY OUTPUT

UNLOCK RELAY OUTPUT

(OPEN)ON

(CLOSE)OFF

ON

OFF

ON

OFF

t : 0.3 second

T1 : 0.5 second

T2 : 1 second

(KEY REMOVED)

(KEY INSERTED)

SYMPTOM PROCEDURES

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SWS SYMPTOM PROCEDURES

54Bb-78

General circuit diagram for the central door locking system