Supra L6-2997cc 3.0L DOHC MFI (1998)
Theft Deterrent Horn: Description and Operation
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, contact "a" and contact "b" in the ECU close alternately in cycles of approximately 0.2 sec., causing
the theft deterrent horn to blow.
In this condition, if any of the following operations is done, the contact "a" in the ECU opens, thus stopping the theft deterrent horn from blowing:
(1) The front LH or RH door is unlocked with a key.
(2) The ignition switch is turned to the ACC or ON position.
(3) Approximately 1 minute elapses.
