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E39 immobiliser issue?

BMW forum 5 series car: E12, E28, E34, E39, E60, E61, F07, F10, F11

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E39 immobiliser issue?

Postby dave0280 » Mon, 26 Apr 2010 19:14:27 UTC

Hi all - having a bit of a nightmare with my E39 at the moment. Its a 1998 523iSE and the battery was dead the other day so i tried to jump start but to no avail. It tried to restart with a 'cough' and then went dead. Called RAC out and even with max juice to the battery it is won't click over. Everything works fine - all key open and lock the car, dash lights etc... but no start. RAC man bypassed the immobiliser thinking it was the starter stuck but thats fine as it tries to start. He thinks the immobiliser is stuck on as all my spare keys won't start the car? Anyone else had this issue and is it a dealer only fix? I've treid the reprogramming keys option again no joy but all the keys work fine..... HELP!!!!
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Postby eddiec » Mon, 26 Apr 2010 22:30:10 UTC

Sounds like the jump start might have caused a problem with the EWS (immobiliser).

When you tried with a jump start the first time, did you connect booster cables directly to the battery or to the +ve terminal and suspension tower ground under the bonnet?


I would start by checking the easy things first. There is a fuse link box located near the battery +ve terminal in the boot (see below). It's worth having a check on the fusible links to make sure they are all intact - a sudden surge current surge could cause them to fail.

Image

These fuse links feed DME relays (F109) amongst other things - for more information on the wiring side of things you may want to check this site (best viewed with opera browser)

BMW Planet

If the fuses check out the next step would be to locate (or obtain) BMW specific diagnostic kit (GT1, INPA etc). Check for and fault codes and do a re-align on the EWS (imobilser) and DME (engine ECU). This resets the rolling code between the two units. See description below for more detail on this.


[web]http://www.bmw-planet.com/diagrams/release/en/zinfo/FOI0996FB-001613501.htm[/web]


Hope this helps
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Postby Clavurion » Tue, 27 Apr 2010 10:27:51 UTC

Is there voltage on starter solenoid when you try to start?
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Postby dave0280 » Wed, 28 Apr 2010 18:59:48 UTC

There is voltage to the solenoid and all fuses are intact so a quick call to my friendly independent and he is coming out to have a look - must be the EWS being frozen out. When jump starting i used the under bonnet tecnique.
Hope it hasn't fried the EWS system.......
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Postby dave0280 » Wed, 28 Apr 2010 19:04:16 UTC

By the way - would my ECU have been wiped in the process or if the EWS is re-aligned to the keys as i have had a live re-map done a while back and wouldn't want to lose the map.....
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Postby Clavurion » Wed, 28 Apr 2010 19:46:55 UTC

So is it cranking but not starting or not cranking despite voltage on starter solenoid? If it's not cranking, it's most likely stuck solenoid, which might free up with hammering. If it's cranking but not starting it could be anything and you'd need to check trouble codes to get further. EWS-DME alignment has nothing to do with software mapping.
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Postby dave0280 » Wed, 28 Apr 2010 20:38:17 UTC

Not cranking but there is voltage to the solenoid. Glad to hear the ECU will be ok.
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Postby machinehead525 » Wed, 28 Apr 2010 21:31:29 UTC

might be the ignition switch - sound simular to my recent experience:

http://www.bmwland.co.uk/talker/viewtop ... ion+switch
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Postby dave0280 » Wed, 12 May 2010 16:11:11 UTC

Just heard from my Indy that its the EWS that has fried itself so a new one is on order from the stealers. Do they need coding to my keys or it is a simple replcement job for my Indy to swap them over?
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Postby Clavurion » Wed, 12 May 2010 19:06:59 UTC

dave0280 wrote:Just heard from my Indy that its the EWS that has fried itself so a new one is on order from the stealers. Do they need coding to my keys or it is a simple replcement job for my Indy to swap them over?


If there is activation voltage on starter solenoid, not cranking can't be an EWS problem. :roll:

EWS module is ordered readily coded from factory according to VIN. EWS-DME sync is still needed after installation.
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Postby dave0280 » Fri, 14 May 2010 08:47:34 UTC

Well - it was the EWS and all is well and the car is running once again. Total cost including the EWS from BMW came in at £170 so can't complain at all. (i also splashed out on a new battery as well - couldn't believe how much they are now!! Halfrauds wanted £130 for a heavy duty one but i got the same one - a Type 017 i think, big bugger!! for £70 in the end)
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