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EWS2, EWS3, CAS emulator

  Emulator will work on ALL BMW cars up to MY’2006 100%, later cars with  EWS4 or CAS3+  will work only if ews4 mode is not active.   Most likely it will work on some LAND ROVER / RANGE ROVER cars with BMW engines, but we didn’t performed any tests here.


Target:

   Some special cases where EWS is not necessary:


Connection:

  4 wires (EWS line, K-line for diagnostics and configuration, “15” Ignition ON, GND. Original EWS must be removed. EWS line must be free - disconnected from CAS or EWS. Cut or pull out pin from ecu connector.


Configuration:

   Steps 2 and 3 are necessary only when EWS3 mode is used. In case of EWS2 car is ready to start immediately after writing correct ISN and EWS2 mode into emulator.


Some EWS3 specifics:


During alignment power supply must be uninterrupted. Otherwise procedure fails.

Wiring loom must match original specification - permanent “30”, must remain ON even after “15” is switched off. Main relay is mandatory.


Alignment in case of EWS can be done with INPA too. At first set emulator for alignment, then launch INPA, launch script for engine, perform EWS3 alignment. Must note that most INPA scripts try to communicate with EWS or CAS even if ECU script is launched. Error must occur, ignore it! Wait until procedure is finished, observe feedback. If alignment fails, turn off ignition, wait some seconds, turn ignition ON, repeat procedure.

Below is example how to connect emulator to MS42 engine ECU. In case of MS43 and DDE4 picture looks very similar because ECU connector and pinouts are the same.

Good luck!