G'day all. I have been researching senders and signals used to drive the speedo, tacho and ECM, so that I can (maybe) learn how to calibrate the newer gauge clusters.
I see that the ZD uses a unified meter control unit. The only signal I have found which drives the tacho comes from the ECM. The manual mentions that the crank angle sensor signal is used for injector timing and fuel injector control but is it used for the tacho signal too?
EDIT: I see the TD uses an Engine Revolution Sensor which produces an AC voltage signal, where as the TB45 and RD produce a DC signal.
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