Suppose that the system of Figure 4-80 is functioning so that the alarm is activated as soon as the driver and/or passenger are seated and the car is started, regardless of the status of the seatbelts. What are the possible faults? What procedure would you follow to find the actual fault?

Data from Figure 4-80

Transcribed Image Text:

IGN DRIV BELTD PASS BELTP 3 +5 V 14 4 2 4 2 5 Z2 Z2 6 6 9 10 Z2 8 12 13 +5V 14 Z2 ||| Z1: 74LS04 Z2: 74LS00 11 ALARM