Mitsubishi Eclipse. Technical Information Manual (1994) — part 92

ETACS

SEAT BELT WARNING TIMER FUNCTION

Placing the ignition switch to the ON position

will apply the H signal of the ignition switch
and the H signal of constant voltage circuit to
AND. Then AND outputs the H signal to operate
the timer circuit.

(2) The timer output turns the transistor Trl ON

and OFF alternately four times in six seconds

(1) Placing the ignition switch in the ON position

will apply the L signal inverted by

to NOR.

If the seat belt is not worn at this time (seat

belt buckle switch OFF), the L signal inverted
by

is applied to NOR. As a result, NOR

outputs the H signal and operates the timer
circuit. The buzzer output turns on the transistor

Tr2 and sounds the buzzer intermittently for

Ignition switch

f

and seat belt warning lamp blinks to remind
the driver of wearing the seat belt.

(3) If the ignition switch is turned OFF while the

timer is in operation, the H signal of the ignition
switch mentioned in (1) above changes to the

L signal to stop the timer circuit operation and

to turn off the warning light.

six seconds to remind the driver of wearing
the seat belt.

(2) If, during timer operation, the seat belt is worn

(seat belt buckle switch ON) or the ignition switch
is placed in the OFF position, the L signal from
NOT changes to H signal and NOR outputs

the L signal. Then the timer circuit stops opera-
tion and the buzzer stops sounding.

link

Constant
voltage

AND

Timer circuit

(Buzzer)

I g n i t i o n O N

switch

O

F

F

Timer circuit
(Warning light)

L - - - - - -

Seat

belt

buckle

switch

Timer H

(ON)

(OFF)

S

ETACS-ECU

bell

EQUIPMENT ETACS

CENTRAL DOOR LOCK TIMER FUNCTION
(1) If the ignition key has already been removed

from the ignition switch (key reminder switch
ON), the L signal of the key reminder switch

is applied to NAND. Or if all doors have been
closed (door switches OFF), the H signal of

the door switch inverted to L by NOT is applied
to NAND.

(2) If the ignition key has been removed from the

ignition switch or all doors have been closed,
NAND outputs the H signal to be applied to

AND.

(3) At this time, pushing the inside lock knob of

the driver’s door forward (door lock actuator

LOCK) will apply the H signal to AND.

(4) As a result, AND outputs the H signal and is

input to the timer circuit through OR to operate

the timer circuit, turning on the transistor Trl
for 0.5 second to lock all doors.

Fusible link

I

NOTE

The door key cylinder and door lock actuator are
connected together by the rod through the door

latch. When, therefore, the driver’s door is locked
by means of the key, similar operation is accom-
plished.

(5) When the driver’s door is in the unlocked condi-

tion, the L signal of the door lock actuator is
applied to NOR.

(6) If, in this condition, the unlocking operation of

the driver’s door using the ignition switch is
done for the second time, the L signal of the
door lock key cylinder switch is applied to NOR.

(7) As a result, NOR outputs the H signal to NOR

and outputs it to the timer circuit through OR
to operate the timer circuit, turning on the transis-
tor Tr2 for 0.5 second to unlock all doors.

ETACS-ECU

Y

AN

NOT

OR

Timer circuit

Door lock

key cylinder

switch (LH)

0.5 sec.

Transistor

1

Door lock
power relay

EQUIPMENT ETACS

POWER WINDOW TIMER FUNCTION
(1) If the ignition switch is placed in the ON position,

the transistor Trl is turned ON and the power
window relay is also turned ON, allowing the

power window to be opened/closed by the power

window switch (main or sub switch).

(2) Turning the ignition switch from ON to OFF will

turn OFF the transistor Trl. At this time, the

ignition switch signal inverted by NOT to H is
applied to AND. In addition, when all doors and

are closed, the H signal from the door

switches and the luggage compartment light
switch is also applied to AND. Therefore, AND
outputs the H signal to operate the timer circuit

and turn on the transistor Tr2 for 30 seconds,
allowing the window to be opened and closed.

(3) If any door or the

is opened while the

timer is in operation, the L signal from the door
switch or luggage compartment light switch*

is applied to AND. Therefore, AND outputs the
L signal to stop operation of the timer circuit.

As a result, the transistor Tr2 is turned off, mak-

ing it impossible to open and close the window.

NOTE

On vehicles with theft-alarm system, the lug-

gage compartment light switch is the
switch.

Fusible

Ignition

link

switch

I

Constant

Transistor

voltage 5V

NOT

AND

Timer circuit

Ignition

switch
Door

ON (open)

switch

Timer

output

ETACS-ECU

Luggage compartment
light switch or

switch

Fusible
link

1

Power window
main switch

Power window motor

Door switch

PARTS AND FUNCTIONS RELATED

E T A C S

Functions

Door lock actuator*

Door lock power relay

NOTE

mark indicates a switch or sensor that can be used for input inspection with a scan tool or voltmeter.

(2)

x mark indicates a

relevant for each function.

INPUT CHECK FACILITY OF ETACS

The ETACS-ECU has an input check facility which
enables you to check all the circuits between the

individual switches and the ETACS-ECU on the ba-
sis of a change in voltage at the ETACS terminal
of the data link connector by use of a scan tool
or voltmeter.

NOTE
For the location and pin positions of the data link
connector, refer to

The input check facility of the ETACS includes the
following functions.

1.

Ignition switch

2.

Door switch

3.

Defogger switch

4.

Tail light

5.

Key reminder switch

6.

Door lock switch

7.

Seat belt buckle switch

8.

Door lock key cylinder switch (LH)

9.

switch