Mk6 2001 non strarter - immobilised or starting circuit

[Fubar]

Hello this is my first post! I've got a mk6 2001 with duratorq 2.4 diesel 90ps. It's been an ok starter but had the tell tale slight delay between turning ignition key to start and the engine turning over and starting. So suspect earth straps

Since last week the engine fails to start, not even turn over, it's dead. there are clicks underbonnet so solenoid could be ok. Battery is bang on, there's 12 v to the starter but .. this is the usual step by step fail finding, I've a push button horn switch for hot wiring if necessary to rule of ignition switch as I've read on similar posts.

But what is causing uncertainty is the led next to the clock used by pats to communicate status ... there no light. Whether key is in ignition or not at no times does it illuminate.. so I'm unsure if there's a PATS issue now ... there's two keys both fit the ignition barrel and turn to start. Maybe one has the chip and the other doesn't and possibly used wrong key to start on now it's immobilised but no warning from immo led!

Want to avoid replacing starter etc when a reset could work, if there is a reset procedure.. welcome any advice please best way to test starter/solenoid in situ ... and or reset pats?. (earth straps undone and wire wooled and replaced)

Thanks a lot
foob

[Altransit]

If you have no power to the PATS circuit, it could be as simple as a blown fuse Unfortunately it could also be a faulty pump EDC

[Fubar]

Hi haven't had the van long so thanks for replying
I guess that's the question, It must flash sometime .. would expect engine to turn over and not start though like an immobilised Galaxy I had instead of playing dead?

[ned]

Test starter by getting someone to turn the key while you bridge the two live terminals with a screwdriver you should hear the solenoid click and the starter spin, sounds like a knackered starter if its been good up to now.

As for the flashy light it could be a case of a lock change and the old key taped to the transponder under the dash, might be might not just a thought.

If your starter has gone to the grave yard don't buy cheap ebay ones as you'll be changing it again in two months

[Altransit]

would expect engine to turn over and not start though like an immobilised Galaxy I had instead of playing dead?

Erm, I don't think so, if the immobilser is operative, it won't turn over at all

[Fubar]

Thanks Nedforceone and altransit. Galaxy VW based turned over but wouldn't start and the hmi alerted immobilised. Not a huge expense to get a new starter to eliminate that part. the immo light is baffling though

[andz327]

Faulty Ignition switch

[Fubar]

Hi again, new starter fitted, all cable and straps wire brushed and refitted but not starting.

One significant change though is the red led (immo?) is now regularly flashing when there's no key in ignition.. but when key (either of the two lollipop keys with the blue square in corner) is in ignition and turned to light up the warning lights.. the immo light flashes rapidly for a minute then it stops with no further flashing... no flash codes .. just nothing

So any advice please on it being immobilised .. a reset sequence or method.. ?

Thanks

foob

[Fubar]

Reading that the ECU or EDC handle the immobilising.. so second appeal is what reader available to read the source of the problem?

Thanks a lot
N

[Frag]

Of the 2 keys you say you have,
Do you know which one was definitely coded and working before this issue ?

[Fubar]

Hi good,question, though have a key ring on the back door key, not convinced it's correct. Both keys turn ignition, I think only one unlocks drivers door and this key successfully started the engine previously (couple of weeks back), only one opens rear door. Using that logic .. can work out which one I used to start it originally .. both keys have the blue piece one has W1 imprinted

Got Haynes manual this morning from eBay and it mentions doors that need to be locked for pats to initialise.. like rear door and at least the drivers...

Trying to get my head round it as it's first PATS vehicle ..

[Frag]

Ok,this probably won't work but is worth a try for free.

Using info here:
viewtopic.php?f=40&t=71739

Turn ignition on,with the key u believe to have worked and be coded.
Then pull fuse 205 out,and refit it while watching PATS led.
See if you can get light to come on for 2 secs and go out without flashing.
If it does,it should start.
Keep trying,leave key in pos 2,pull and refit that fuse.

(P.S.I don't think a mk6 should have a W1 key,I think they were plain blue chip,too early for W1)

And,doors and locking have nothing to do with PATS operation on a mk6

[Fubar]

Morning all, all sorted and starting on the button like new, quick to spin and starts in half a turn
Needed a new part and some work but working perfectly well.
Thanks for replies even though didn't resolve the problem it helped get there
f

[ned]

What was the problem It may help others in the future.

[andz327]

At least mention what the fix was mate