Crank sensors are usually permanent magnet generators and actually make a small voltage signal when they turn, so to answer your question no there shouldn't be any voltage coming from computer to the crank sensor.
SOURCE: hilux d4d it starts and
there are only four possible causes for this, and you have made provisions for two-the ECU and the crank sensor-You will need to check the connector and the wiring going back to the ecu, use a ohm meter to look for a damaged or broken wire. another possible reason for this is a damaged reluctor inside the engine, turn the engine over by hand and inspect the teeth of the reluctor with the sensor removed and inspect for a damaged tooth-
Not sure what a diode test light is, but I would check with a DC voltmeter for a 12 volt pulse. The pulse is very short in duration, so you might not see it. Check for spark at the spark plugs. If fuel pump is bad, you won't have fuel pressure. There are numerous reasons for an engine not starting.
SOURCE: GWM Steed 2.8td not starting
Hi , this may sound funny but i found on other pickups that would not start the battery was ok the alt was ok it ended up the coolant sensor was duff replaced it and the car started ok.
Testimonial: "I will replace thnx"
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