HTG GCU pinout.

  Inputs: AN_in: Measures voltage input. Switchable range 0-5v and 0-12v for maximum resolution and precision. FREQ_in: Senses pulse (frequency) signal. Used mainly to measure shaft speed sensors in the transmission. Can be also used as tacho RPM input if other methods are unavailable (CAN bus). Can measure Time, duty and speed. DIG_in: Senses switching [...]