Alfa 147 2.0TS crank sensor failure? (log inside)

[ZoLtaR]

Hi guys.

The car is Alfa 147 2.0TS. Doesn't start at all. Engine completely died. No spark on plugs. Looks like crank sensor is dead but I have to be pretty sure before replacing it. I took off spark plugs and cranked engine for about 20s. Live data from rpm sensor looks pretty weird. Sensor is seeing rpm's for a moment and then reports 0, than again about 200rpms and then again 0. It might be a dead sensor? I assume it's not normal situation.



and log file
http://ital-performance.pl/temp/alfa_14 ... ailure.csv

Thanks for your help.

[yani]

If this is with a VAGCOM interface then the 0 could be caused by communication error (due to low power supply during cranking). So, don't blame the sensor yet.
Any stored errors?

[ZoLtaR]

Interface ELM327-USB , no stored errors.

[ZoLtaR]

Dead crank sensor. Fitted new one and everything is ok.