2003 BMW 3 SERIES Drive Away Protection Syst

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BMW 3 SERIES 2003 E46 Drive Away Protection Syst Initial Print Date: 5/01Revision Date:
Subject Page
Drive  Away  Protection..................................................................................3
EWS I....................................

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BMW 3 SERIES 2003 E46 Drive Away Protection Syst 2
EWS
Drive Away Protection System (EWS)
Model:  EWS I/EWS II/EWS III/EWS III D
E31/E34/E36/E38/E39/E46/E52/E53
Production Date:  All since 1/94
Objectives
After completion of this module you should b

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BMW 3 SERIES 2003 E46 Drive Away Protection Syst 3
EWS
Drive Away Protection 
The  first  version  of  Drive  Away  Protection  was  installed  on  production  vehicles 9/93
through 12/93.
Purpose of The System
The purpose of the Drive Away Protecti

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BMW 3 SERIES 2003 E46 Drive Away Protection Syst 4
EWS
Principle of Operation
When the vehicle is locked from the outside, a High signal is sent to the GM from the door
lock  switch.  The  GM  receives  this  High  signal  and  outputs  a  High  sig

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BMW 3 SERIES 2003 E46 Drive Away Protection Syst 5
EWS
EWS I
EWS  I  was    installed  on  vehicles  beginning  production 1/94,  replacing  the  original  Drive
Away Protection System.
Purpose of the System
The next level of compliancy with the Eur

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BMW 3 SERIES 2003 E46 Drive Away Protection Syst 6
EWS
Door Lock Cylinders and Switch
The door lock cylinders and switch input a High/Low signal into the GM informing the GM
of lock status.  The signal is High when the system is in Double Lock. 
Gen

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BMW 3 SERIES 2003 E46 Drive Away Protection Syst 7
EWS
• 4 cylinder =1800 RPM
• 6 or 12 cylinder =1200 RPM
• 8 cylinder      =900 RPM
The  relay  contacts  will  close  when  the  exceeded  Hz  value  drops  to  5Hz  below  the  maxi-
mum valu

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BMW 3 SERIES 2003 E46 Drive Away Protection Syst 8
EWS
EWS II
Starting with 1/95production, all vehicles were equipped with a new EWS system, EWS II.
This  change  was  once  again  brought  about  to  meet  the  next  level  of  compliancy  with  t
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