I have a Discovery 2 that started it's life as a V8, but a previous owner retrofitted a 300tdi engine (mechanical throttle control). It runs fine, but the rev counter and temperature gauge don't work, presumably because the signal for those was coming via the ECU.
The question I have is - does anybody know what kind of a signal does the V8 rev counter gauge on the dashboard expect? Is it just an analogue voltage (essentially like a volt meter), does it work as a pulse counter, or something else?
Similarly, the temperature gauge on the dashboard - what kind of a signal does it expect? Does it also operate as an analogue voltage gauge, or a potential divider (i.e. expects a thermistor sensor on the other side of it) or something else?
I am not afraid of splicing into the wiring loom and getting something like an Arduino wired up to generate whatever signals are required to produce meaningful readings on the rev counter and the temperature gauge, but I can find no detailed data sheet spec on what kind of input those two gauges expect.
TIA
The question I have is - does anybody know what kind of a signal does the V8 rev counter gauge on the dashboard expect? Is it just an analogue voltage (essentially like a volt meter), does it work as a pulse counter, or something else?
Similarly, the temperature gauge on the dashboard - what kind of a signal does it expect? Does it also operate as an analogue voltage gauge, or a potential divider (i.e. expects a thermistor sensor on the other side of it) or something else?
I am not afraid of splicing into the wiring loom and getting something like an Arduino wired up to generate whatever signals are required to produce meaningful readings on the rev counter and the temperature gauge, but I can find no detailed data sheet spec on what kind of input those two gauges expect.
TIA