Disco 4 tdv6 2.7 year 2011 looking for crankshaft sensor location

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Originally Posted by Graeme

I've not read of anyone needing to do anything after replacing a faulty or failed TDV6 or TDV8 crankshaft position sensor, but that's not to say that the ecu has got itself into a knot about the DTC that would be cleared with a reflash. I'm reminded of my TD5 D2's ecu that had to be replaced because the dealer couldn't clear a DTC stored for a disconnected coolant temperature sensor.

Is anyone nearby with an IIDtool to try clearing all faults?

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I'm seriously thinking of editing the post I did above as it's all theory based on a couple of random facts and could just mislead people, and that's not my caper!

Most available OBD2 scan tools should be able to clear the fault, I'm only guessing but I'd imagine that has already been done.

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Originally Posted by loanrangie

Aren't codes meant to clear after a certain number of shutdown/restart cycles ?
Or maybe after a hard rest.

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Not really, but it depends on the code and the ECU.

On newer stuff there will be current faults and archived faults from a previous drive cycle, usually the old stuff stays there until cleared.

On the Bosch TCU I've done work with, faults will get cleared after a certain amount of starts or if it runs out of room to store them and a more critical fault gets logged, but that's pretty ol_skool now.

Quote:

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Originally Posted by loanrangie

Aren't codes meant to clear after a certain number of shutdown/restart cycles ?
Or maybe after a hard rest.

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Quote:

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Originally Posted by shack

Not really, but it depends on the code and the ECU.

On newer stuff there will be current faults and archived faults from a previous drive cycle, usually the old stuff stays there until cleared.

On the Bosch TCU I've done faults will get cleared after a certain amount of starts or if it runs out of room to store then and a more critical fault gets logged, but that's pretty ol_skool now.

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My only experience was a couple of years ago where I used the Nanocom to clear some fault codes and they were not shown again vi a check with the Nanocom. When I asked the Indy about something he gave me the printouts from his Autologic and it showed the one I had cleared as an historic fault.

What that means - :spudnikwhat:

My D4 had to have an ECU reflash to get it going after being worked on. I can’t remember what it was, but the bugger wouldn’t start without a reflash.
Another ex-member had the same issue. Did some work on it and it refused to go again. Last straw reflash and up it started.

Weird. Makes no sense to me but I can only assume it resets some aspect that it’s unhappy with. Still makes no sense.