E53 4.4i Replaced Alternator Bracket Gasket now the engine spins but wont start
 

Hey all, I have changed out the bad oil seal on my X5 alternator bracket. Now I go to start the car and it spins over but wont start. I think its the immobilizer because I had the battery disconnected for a few days while I was working on it.

Can anyone point me in the right direction to correct this issue?

Thanks in advance

Check your alternator connections.

Attachment 79004

Am few xo member have had same problem recently. EWS sync was the problem.

Yes basically there are 2 connections at the alternator and one is the main lug and one electric wire connection and I know I got those correct. I have ISTA+ is there a way to resync using that software?

Scan it with ISTA+ and see if it gives you an error on the EWS module.

How are people losing their sync on the EWS anyway?

I ask because there was a member who did not plug in the harness all the way and had the same issue you are.

Three in 2020 on xoutpost lost ews sync that I'm aware of


Sent from my iPhone using Tapatalk Pro

Make that four.
It turns out that receiving your brand new Foxwell scanner and running directly out to the garage to plug it into your X eager to test EVERYTHING, without first hooking up your battery charger/supply, is a really bad idea if that same X has a more or less depleted battery from the previous days of messing around with installing a couple of oldschool amplifiers. :rolleyes:



It's bad enough having your battery voltage drop below the critical point of getting communication errors between the various modules. But when it happens while your shiny new Foxwell is busy accessing those same modules, all hell breaks loose.
And amidst the multitude of resulting faults and error codes i also had:
2737 - DME: EWS 3.3 anti-tampering protection
27A4 - DME: EWS3.3 interface management engine-immobilizer


It took me half a night -and a couple of INPA sessions to get the car running again. :(

I was wondering if voltage was an issue in these situations. Why I purchased a power supply for ncsexpert sessions.

Side note, what old school amps you put in Freestyler?

I have no doubt that low voltage in one form or another is the root cause in most of these "my-car-has-gone-batsh!t-crazy"-situations.

It would have been a neat design feature if this, for it's time, very sophisticated control & error reporting network had a automatic voltage check added to all error registrations, so the error log would read something like:
Error code XXXX - Transmission is FUBAR -But wait.. Simultaneously a low voltage condition was also registered. So maybe fix whatever dodgy connection you might have or try charging your battery before replacing the transmission. :D



Two matching Denon DCA-800's.
Most who were part of the high-end car stereo craze that went down during the 80's & 90's, will know what those are. :bow:

When you do a full scan you will see half a dozen modules reporting insert voltage error so it's pretty easy to guess it's the actual cause. That said the ews thing is a suck-o-rama situation