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