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My apologies if this has been done before, but I had to hunt around various threads to find what voltages each sensor needs to be, so I made up this list. This is from the R34 Workshop manual.

All voltages are for the NEO RB25DET engine. Earlier engines may be the same, but need to be confirmed. If you haven't used a multimeter before, you can get a cheapy from Dick Smiths or similar for about $15. There are heaps of vids on YT showing how to use them.

http://www.youtube.com/results?search_quer...tal+multimeter+

TPS - (With IGN on, engine off) 0.4-0.5V. 4.0-4.2V @ WOT ------- With engine on: 0.6-0.7V @ 2000rpm

Oxygen Sensor - 'Fluctuates between 0.1-0.4V and 0.7-0.9V'

Air Flow Meter (Mass Air Flow) - (IGN on, engine off) 0.2V -------With engine on: 1.1V @ idle. 1.6-1.7V @2000RPM

Coolant Temperature Sensor - ~3.5V (and 3000 OHM) when cold, ~1.2V (and 300 OHM) when hot

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