VVTi Signal 2010/03/17Posted by Michael in 2JZduino.
One of my readers asked that I datalog the VVTi signal in a similar way to the Cam and Crank Signals.
Apparently VVTi operates at the alternator voltage: ~14V. I built a 1:3 voltage divider using three 10k resistors to step the voltage down enough to be read by the Arduino analog input. I understand the VVTi signal is PWM. Below is a chart of the captured signal – positive waveform only.
Download VVTi Signal Datalog.pdf for a full 3 seconds of raw data captured at ~8000 Hz.