4.8is Cranks over but engine won't start

[Junkycosmos]

hi Ghost

The codes that persisted after clearing was:
DSC - 5EB1 Steering - Angle Sensor, supply

DME - 27A4 EWS3.3 interface engine management immobilizer - no EWS telegram

Did some searching on DME / EWS
Here is an interesting link with details on EWS, the E53 4.8is does use as


(google found it from this link)
http://www.computersolutions.cn/blog...02/BMW_EWS.pdf

I have not gone through it all in detail but here is what caught my search

(top of page 21)

"If the “Codes” do NOT match, the DME “rolls forward” to the next code according
to the “Rolling Code Table” and makes the same calculations. The DME continues
this “forward roll” up to a maximum of 200 times or until a match is found. Failure
to find a match will result in the engine cranking but not starting."

also the Workshop hint on that page caught my attention too

"Workshop Hint:
If during diagnosis the key is switched on while the DME or EWS modules are “Disconnected”, the alignment procedure will need to be carried out.
The “Alignment” procedure may be carried out an unlimited number of times."



Maybe someone here knows how to re-align EWS to DME via INPA or GT1

[X5Ghost]

Originally Posted by Junkycosmos

hi Ghost

The codes that persisted after clearing was:
DSC - 5EB1 Steering - Angle Sensor, supply

DME - 27A4 EWS3.3 interface engine management immobilizer - no EWS telegram

Did some searching on DME / EWS
Here is an interesting link with details on EWS, the E53 4.8is does use as


(google found it from this link)
http://www.computersolutions.cn/blog...02/BMW_EWS.pdf

I have not gone through it all in detail but here is what caught my search

(top of page 21)

"If the “Codes” do NOT match, the DME “rolls forward” to the next code according
to the “Rolling Code Table” and makes the same calculations. The DME continues
this “forward roll” up to a maximum of 200 times or until a match is found. Failure
to find a match will result in the engine cranking but not starting."

also the Workshop hint on that page caught my attention too

"Workshop Hint:
If during diagnosis the key is switched on while the DME or EWS modules are “Disconnected”, the alignment procedure will need to be carried out.
The “Alignment” procedure may be carried out an unlimited number of times."



Maybe someone here knows how to re-align EWS to DME via INPA or GT1

Junkycosmos, thanks for your thoughts and follow up on this not to mention your visit to help me pull the codes. You are a true fellow X5er

To summarize, I have a crank and no start. The fuel and air are ok however, it appears there is no spark. The code pulled by GT1 is:
DME - 27A4 EWS3.3 interface engine management immobilizer - no EWS telegram

The communication between the DME and EWS appear to have been interrupted thus preventing subsequent steps to commence and initiate a spark for ignition.

Does anyone know how to re-establish or re-align the communication between the two modules (DME and EWS)?

Thoughts appreciated?