Mitsubishi 380. Instruction - page 48

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-189

DRIVER’S DOOR UNLOCK FUNCTION

.

PRESSING THE TRANSMITTER UNLOCK
BUTTON ONCE

When the transmitter unlock button is pressed once, the
ETACS-ECU energizes its door unlock relay to operate the
door lock actuator of the driver’s door for 0.25 seconds, thus
unlocking only the driver’s door.

ALL DOOR UNLOCK FUNCTION

.

PRESSING THE TRANSMITTER UNLOCK
BUTTON TWICE

When the transmitter unlock button is pressed twice, the
ETACS-ECU energizes its door unlock relay to operate the
driver’s door lock actuator and the other door lock actuators for
0.25 seconds each in succession. All the doors will be
unlocked.

NOTE: If the timed locking function is available, the doors will
be locked in 30 seconds after the initial unlocking. Therefore,
the second door unlocking should be done within 30 seconds
after that initial unlocking.

TRUNK UNLOCK FUNCTION

.

PRESSING THE TRANSMITTER TRUNK BUTTON

Press the "TRUNK" button twice within 5 seconds and the trunk
lid will be unlocked.

AC200819AD

ON

(UNLOCK)

OFF

Transmitter

unlock

button

t: 0.25 second

OFF

ON

Door unlock relay

output

Driver's door

lock actuator UNLOCK

LOCK

t

AC202610 AF

ON

(UNLOCK)

OFF

Transmitter

unlock button

t: 0.25 seconds

OFF

ON

Door unlock relay

output

LOCK

UNLOCK

LOCK

UNLOCK

Driver's door

lock actuator

t

t

All door

lock actuator

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-190

KEYLESS ENTRY HAZARD ANSWERBACK AND
HORN ANSWERBACK FUNCTION

.

KEYLESS ENTRY HAZARD ANSWERBACK

FUNCTION*

1

If the keyless entry transmitter is used to send a lock signal to
the ETACS-ECU, all doors are locked and the hazard warning
lamps flash once. If an unlock signal is sent, the driver's door is

unlocked first,*

2

and if a second signal is sent, all doors are

unlocked. Each time the unlock signal is sent, the hazard warn-
ing lamps flash twice.

NOTE: *

1

: The hazard answerback function can be customized

using the keyless entry transmitter (Refer to Group 42

P.42-72

,

Keyless Entry System) or by using the multi center display
(middle grade type). Refer to

P.54B-486

.

NOTE: *

2

: Vehicles with a multi center display (middle grade

type) can be customized so that a single unlock operation will
unlock all doors. Refer to

P.54B-486

.

.

KEYLESS ENTRY HORN ANSWERBACK
FUNCTION

If the keyless entry transmitter is used to send a lock signal to
the ETACS-ECU, the first signal locks all doors while the sec-
ond signal sounds the horn once.

NOTE: : The horn answerback function can be customized by
using the keyless entry transmitter (Refer to Group 42

P.42-72

,

Keyless Entry System) or by using the multi center display
(middle grade type). Refer to

P.54B-486

.

TIMED LOCKING MECHANISM

.

After unlocking the doors with the keyless entry transmitter, if
no doors are opened, if the ignition key is not inserted or if the
locking function is not operated, the ETACS-ECU automatically
locks the doors in 30 seconds.

NOTE: The timed locking function can be customized on vehi-
cles equipped with a multi center display (middle grade type).
Refer to

P.54B-486

.

AC209072AC

ON

OFF

OFF

ON

OFF

LOCK

UNLOCK

Illuminated
Not

illuminated

Keyless entry

transmitter switch

Lock relay output

Unlock relay output

Hazard

warning light

flashing state

AC209073AC

LOCK

OFF

LOCK

UNLOCK

ON

OFF

Keyless entry

transmitter switch

All door

lock actuator

Lock relay output

Horn relay output

ON

OFF

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-191

INSPECTION PROCEDURE E-1: Keyless Entry System: Keyless entry system does not operate.

.

CIRCUIT OPERATION

A receiver is incorporated in the ETACS-ECU. This
receiver receives a lock or unlock signal from the
transmitter.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The RKE transmitter may be defective

• The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: diagnostic tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

STEP 1. Verify the central door locking system.

Q: Does the central door locking system work normally?

YES : Go to Step 2.
NO : Refer to Inspection Procedure C-1 "The central door

locking system does not work at all

P.54B-122

."

ETACS-

ECU

RECEIVER

· TRANSMITTER"LOCK"SWITCH

· TRANSMITTER"UNLOCK"SWITCH

Transmitter ("LOCK"/"UNLOCK") Input Signal

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-192

STEP 2. Check the input signal (by using the pulse check
mode of the monitor).
Check input signals from the transmitter.

CAUTION

To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958.Refer to "How to

connect SWS monitor

P.54B-13

."

(2) Operate diagnostic tool MB991958 according to the

procedure below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."

(3) Push the transmitter "LOCK" or "UNLOCK" button.
(4) Check that diagnostic tool MB991958 sounds

Q: When the transmitter "LOCK" or "UNLOCK" button is

turned ON, does diagnostic tool MB991958 sound?
YES :
Replace the ETACS-ECU. All the doors can be locked

or unlocked by means of the transmitter.

NO : Refer to Inspection Procedure N-8 "ETACS-ECU

does not receive any signal from the lock, unlock,
trunk or panic switch

P.54B-472

."

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

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