Chrysler laser 1990 Technical Information Manual page 84

THEFT-ALARM SYSTEM
When the theft-alarm system has been armed by a
fixed sequence for locking the doors with the key or
without the key, if thereafter a door, the rear hatch
or the hood is opened in an unauthorized way. the
horn will sound intermittently for period of approx-
imately three minutes, and. at the same time, the
headlights will flash on and off, thus providing
audible and visual warning. signals.
OPERATION
* .
ELECTRICAL - Theft-alarm System
Key-reminder
switch
Starter
Security lig
ECU
A door rear hatch or hood is broken
Headlights
flicker
SYSTEM DISARMED
Furthermore, the starter circuit is interrupted in SI
a way that the engine cannot be started, if ' L
ignition key is not used. Note that this system is
controlled by the electronic control unit (ECU).
This ECU includes an independent microcomputer
for the exclusive use of the theft-alarm system. This
microcomputer arms, disarms, activates and deacti-
vate the alarm system.
The system is composed of the components de-
scribed below.
daytime running light relay
About 20 seconds after all doors are closed
and locked. the rear hatch is closed. and the
hood is closed + SYSTEM ARMED
l .
Driver unlocks a door
or rear hatch with the
(SYSTEM DISARMED)
Door key cylinder