Arduino, + ZCD , zero crossing detector is a must for VR coil sensors (most) as the signal are tiny for sure low speed. of car. (a HALL sensor would be cake walk )
here is one example of the first part of the job, measuring frequency.
the next stop is scale up this new Freq. by 113% just using math.
freq-out = freq x 1.13 (now 13% more)
the set timer to freq-out
google how to use Arudio to output a timer clock you control. (using freq-out)
and send it to a pin and connect that pin to VSS pin on TCM.
now the bad news, no spec on TCM
if lucky at least one pin might be ground and 2nd is input to TCM, vss1.
at the worse Ive done this and used transformer to emulate the VR sensor into TCM.
a 1:1 turns ratio transformer very very tiny one, 600ohms rated, for audio work;.
I did the once to fool a FORD ECM to like my fake CRANK CKP sensor.
the VSS1 pins on the TCM
are not documented. pin # and color are, but not how TCM processes those pins, but in most cases is a ZCD in the TCM, .
here is one example of the first part of the job, measuring frequency.
the next stop is scale up this new Freq. by 113% just using math.
freq-out = freq x 1.13 (now 13% more)
the set timer to freq-out
google how to use Arudio to output a timer clock you control. (using freq-out)
and send it to a pin and connect that pin to VSS pin on TCM.
now the bad news, no spec on TCM
if lucky at least one pin might be ground and 2nd is input to TCM, vss1.
at the worse Ive done this and used transformer to emulate the VR sensor into TCM.
a 1:1 turns ratio transformer very very tiny one, 600ohms rated, for audio work;.
I did the once to fool a FORD ECM to like my fake CRANK CKP sensor.
the VSS1 pins on the TCM
are not documented. pin # and color are, but not how TCM processes those pins, but in most cases is a ZCD in the TCM, .
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