Audible Warning Device Control Module: Description and Operation

OPERATION:
- When the ignition switch is turned ON, the decision circuit operates and the seat belt warning light inside of the combination meter flashes four times for 6 seconds.
- The decision circuit output makes the seat belt warning buzzer sound intermittently for 6 seconds to indicate unfastening of the seat belt.
- When the seat belt is buckled (seat belt switch is turned ON), the seat belt warning buzzer stops sounding.
When the ignition switch is turned OFF, both seat belt warning light and buzzer do not operate.
- When, with the tail light illuminated (lighting switch-tail), the ignition switch is turned off and the driver's door is opened (door switch is switched ON), the ECU detective circuit will function.
- With the detective circuit activated, buzzer output makes the buzzer sound continuously to remind that the tail light is illuminated.
- The key reminder buzzer has a function priority to the lighting monitor buzzer. With the key inserted in the key cylinder, buzzer sounds intermittently.
- Battery voltage is always applied to the dome light. When the dome switch is turned to "ON", the dome light will remain lit After either door is opened if the dome light switch is at "DOOR" position, the dome light will come on.
- In this case, the timer circuit in the ETACS unit will be activate to gradually vary the voltage for approx. 6 seconds owing to the duty control, and the voltage will be output to power transistor. Since the voltage applied to the dome light gradually decreases, the dome light will be dimmed.
- If the ignition switch is turned to "ON" while the dome light is lit (while the timer is activated), the timer circuit will be opened to turn "OFF" power transistor. This will immediately turn off the dome light without dimming.