16F0384
7-
ELECTRICAL - ETACS
DEFOGGER TIMER
(1) When the ignition switch is ON, if the defogger
switch is turned ON, the signal input to the NOT
becomes an L signal, and the converted H signal
makes the timer circuit operate. Next, an H signal o
the power circuit and an H signal of the timer circuit
are input to the AND and the output H signal turns
transistor Tr1 ON. This causes the defogger relay to
operate, and current flows to the defogger.
After 11 minutes, the signal output by the timer
circuit becomes an L signal, and the defogger op-
eration is stopped.
(2) Even if the defogger is operating, if the defogger
switch is turned once more to ON, the defogger
relay turns OFF and the defogger operation is
stopped.
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