Our Three outputs as previously stated were
1) Seat Belt warning light - Seat Belt warning light must blink for 6 seconds from Ignition with 0.6 second frequency, with a 50% duty and a chime bell. If the IG. is turned off within 6 seconds, the warning light and chime bell must be 'off'. Below is the Seat belt warning light control circuit.
2) Buzzer System - If Seat Belt has not been fastened “After 15 second of ignition on status”. The buzzer will play the audio 3 times along with LED. If the seat belt is still not fastened, the audio and LED will flash after every 20 seconds.
3) Drive By Wire Throttle - Drive by wire throttle has no mechanical linkages, it saves weight, is more accurate and has better response times however the cost to make it is higher than a regular cable throttle. How it works is the driver presses gas pedal, there is a sensor attached to the pedal which measures how much it is pressed which then sends signal to ECU to turn the motor accordingly which in turn opens or closes the butterfly valve to allow for air to come in. There is another sensor after that which sends signal back to ECU to measure how much the butterfly valve is open or closed to ensure everything is working as it should.
Below is an image of a gas pedal from a drive by wire throttle system with a accelerator position sensor.
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