For VR sensor
- VR input is needed'''
- or [VR => HALL adapter] and HALL input
For HALL sensor, HALL input is needed
VR input will normally not work (or worse: might work unreliably)
VR input expects the signal to go negative (as a VR sensor...) and
HALL sensor signal is positive between 0V (or rather +0.2V in practice) and +4..5V (because of 2k7 pullup resistor to +5V ; this resistor is usually inside the ECU when it has HALL input, otherwise it must be right at the HALL sensor; )
Some trick/hack might be possible (not difficult, but not supported; it might work reliably or not depending on if the installer knows what he is doing ; measuring, scoping, etc... again: not supported) with 470 Ohm and 18k resistor divider to get negative signal from mainboard (eg. 18k .. 20k from RS232 -9V available inside on LCD pinheader) but