EWS3 - No start / no crank - AK90 write fails

[Z4OnABudget]

Hi,

I’ve recently had my battery disconnected for a few weeks and have now got a no start / no crank issue (all other electrics work fine), I’ve bought an ak90 and can read key and ews data fine but the write process fails.

Any ideas?

I’ve tried cleaning the connection but all seems fine as it reads both ok, at a bit of a loss as to what to do now.

Thanks in advance.

 

[bigwinn]

Which engine?

I would delete the ews

 

[Z4OnABudget]

M54 2.5i. If I delete ews how will I rewrite it?

 

[bigwinn]

You don’t need to

If you unlink the ews software then the key/car start is not dependent on security protocols

 

[Z4OnABudget]

Thanks, might give that a go.

One thing though, I tried bypassing ews using a 30 amp fuse but the car still wouldn’t crank

 

[bigwinn]

No you need to do it with software

I use bimmertools m54 ews delete

 

[Z4OnABudget]

Ahh I see, if I erase the ews will I still need the software?

If so, where can I get it and what cable will I need? Thanks

 

[bigwinn]

Dcan cable is fine (same as you would use with inpa)

https://www.bimmertuningtools.com/product/mss5x-quickflash/