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E T A C S
E T A C S
General Information
General Information
Actually, ETACS starts by the needs to control time and alarm
related electric device of the vehicle in one controller.
The controlled items can be more or less according to the
vehicle grades or trim levels but the basic concept is similar.
That is why a system of a vehicle is familiarized, easy
to understand other systems.
General Information
General Information
Seat Belt Warning
Tail Lamp Auto Cut
Central Door Lock
IGN. Key operated warning
IGN. Key Reminder
Crash Door Unlock
Anti - theft Function
Keyless Entry Function
ETACS Module Function
General Information
General Information
ETACS INPUT & OUTPUT Diagram
Inputs
Battery(Back-up Voltage)
Ignition 1 & 2(Power Voltage)
Alternator “ L “ Terminal
Seat Belt Switch
FRT. LH Door Switch
All Door Switch (each door S/W)
Hood Switch / Trunk Switch
Door Lock/Unlock Switch (in actuator)
Ignition Key Warning Switch
Tail Lamp Switch
Crash Sensor
etc
Seat Belt Warning Indicator
Hazard Relay
Central Door Lock Relay
Tail Lamp Relay
Start Inhibitor Relay
Chime Bell
E
T
A
C
S
C
M
Controller
Output
E T A C S
E T A C S
FUNCTION
FUNCTION
Detail
Detail
Seat Belt Warning Timer
Description
1. Seat belt warning lamp must blink for 6 seconds from IG. ON with 0.9 sec.
frequency, 50% duty, and chime bell should ring too.
2. If the IG. is turned OFF within 6 seconds, the warning lamp and chime bell
output should be OFF.
3. In case of the seat belt switch is ON, the chime bell sound must be stopped
immediately, but seat belt warning lamp output should be ON during 6 seconds.
4. If the seat belt is not fastened while IG. is ON, the warning lamp
and chime bell output should be repeated continuously until the seat belt is fastened.
* T1 : 6 ±1.0 sec. * T2 : 0.45 ±0.1 sec. *T3:0.3 ±0.1sec.
IGN. S/W
Seat Belt
S/W(N.C)
Seat Belt
Warning Lamp
On
Off
On
Off
On
Off
T1
T2
T1
Chime Bell
On
Off
T3
Seat Belt Warning Timer
ST
IG1
IG2
BATT 12V
5V
ETACSCM
Seat Belt S/W
Seat Belt Warning Lamp
IGN. Key
IGN. Key S/W
Key Operated Warning
Description
1. If the driver door is opened with the IG. key is inserted into key cylinder,
the chime bell should ring with 0.9 second frequency, 50% duty continuously.
2. When the key is removed from key cylinder or the driver door is closed,
door warning output is stopped immediately.
▶ Chime Bell Operating Order : Seat belt warning → Key operated warning
Door
Warning Switch
Driver’s DR S/W
Chime Bell
Key in
Key out
Open
Close
On
Off
* T1 & T2 : 0.45 ± 0.1 sec.
T1
T1
Key Operated Warning
Chime Bell
Key Operated Door Warning S/W
from BATT.
Driver’s DR S/W
to DR opening indicator
in cluster
E
T
A
C
S
C
M
Ignition Key Reminder Control
Description
This function is to prevent vehicle from Lock if IG. key is inserted into key cylinder.
1. IG. key is inserted into key cylinder.
2. The signal of IG. key insert condition is perception in ETACSCM.
3. At this time if pushed door lock knob of front LH or RH door, door unlock signal
output for 1 sec.
4. So, that during insert key into the key-cylinder to prevent door lock.
DR Warning
Switch
On
Off
FRT LH/RH
DR S/W
FRT LH/RH
DR Lock S/W
Door Lock
Actuator
Unlock Output
Open
Close
On(Unlock)
Off(Lock)
On
Off
T2
T1
T3
* T1 : 1 ± 0.1 sec. * T2 : 0.5 ±0.1 sec.
KEY INSERT
KEY REMOVED
CASE 1
T2
Ignition Key Reminder Control
KEY INSERT
CASE 2
DR Warning
Switch
On
Off
FRT LH/RH
DR S/W
FRT LH/TH
DR Lock S/W
Door Lock
Actuator
Unlock Output
Open
Close
On(Unlock)
Off(Lock)
On
Off
T1
* T1 : 1 ± 0.1 sec. * T2 : 0.5 sec.(MAX)
KEY REMOVED
T1
T2
T1
T2
Ignition Key Reminder Control
AM Acc IG1 IG2 ST
Acc
ON
ST
Ignition Switch
BATT.
Fusible Link
ETACS
Control
Module
Each Door Lock
Actuator
A A
A
143Ω
143Ω
Battery
Battery
Battery
Central Door Lock
Relay
Dash
Fuse
Box
Unlock RLY
Lock RLY.
Lock
Unlock
A
Driver side
DR. Actuator
Lock/Unlock
S/W operated
by Key or
Knob
Door Lock Knob
Door Warning
Switch
Tail Lamp Auto Cut(off)
Description
1. In case of the tail lamp switch is turned ON after IG. SW ON or the driver door
is opened after IG. SW OFF, the tail lamp is extinguished automatically.
2. In addition, the IG. SW is turned OFF after driver door is opened with
IG. SW is ON condition, the tail lamp will be extinguished automatically too.
3 After automatic extinguish, if the tail lamp switch is turned ON again,
then, the tail lamp will be ON (illuminating) and the auto cut function will be released.
IG. KEY
Switch
On
Off
On
Off
Open
Close
Tail Lamp
Switch
Driver’s Door
Switch
Lamp Auto Off
Tail Lamp
(Relay)
On
Off
Tail Lamp Auto Cut(off)
ACC
IG2
IG1
ST
B1 B2
ACC
IG2 IG1 ST
IGN SW
L
R
Alternator
100A
ETACSCM
Tail Lamp Relay
Driver’s
DR S/W
Door Warning S/W
A9
B11
A17
B13
Tail Lamp
Fusible Link
BATT.
Central Door Lock Control
Description
The ETACS module receives “Lock/Unlock” signal from the front LH or RLH door switch, door “Lock” or
“Unlock” relay is executed 0.5second later.
◆ In case of front LH or RH door switch is on less than 60ms, door actuator should be off.
Driver Door
Lock Switch
Door Lock
Relay
* T1 : 0.5 ± 0.1 sec.
Assist Door
Lock Switch
Lock
Unlock
Lock
Unlock
On
Off
On
Off
T1
Door Unlock
Relay
T1
T1 T1
Central Door Lock Control
AM Acc IG1 IG2 ST
Acc
ON
ST
Ignition Switch
BATT.
Fusible
Link
ETACS
Control
Module
Each Door Lock
Actuator
A A
A
143Ω
143Ω
Battery
Battery
Battery
Dash
Fuse
Box
Unlock RLY
Lock RLY.
Lock
Unlock
A
Driver side
DR. Actuator
Lock/Unlock
S/W operated
by Key or
Knob
Crash Door Unlock
Description
1. If the airbag signal is inputted to the ETACS when the door is locked, the unlock signal is executed
immediately for safety.
2. At this time, all door should be unlocked for operating above “unlock execution”.
3. “Door unlock” is activated only one time while IGN 1 switch is on.
T1
T1 : 200 ms. T2 : 40 m sec. T3 : 5 sec. ± 0.5 sec.
Air Bag Module
Crash Signal
Door Unlock
Relay
Low
High
Unlock
Lock
T3
Door unlock signal output
from A/BAG control module
IGN 1 Switch
On
Off
T2
Crash Door Unlock
A/BAG
Module
A/BAGCM
CRASH
SIGNAL
Lock
Unlock
Each Door Lock
Actuator
A A
A A
A : Door Lock Actuator
AM Acc IG1 IG2 ST
Acc
ON
ST
Ignition Switch
BATT.
Fusible
Link
ETACS
Control
Module
Central Door Lock
Relay in J/BOX.
Dash
Fuse
Box
143Ω
Battery
143Ω
Unlock RLY
Lock RLY.
BatteryBattery
ANTI-THEFT
FUNCTION
