1996 BMW 8 SERIES Drive Away Protection Syst

Page 17 of 30

BMW 8 SERIES 1996 E31 Drive Away Protection Syst 17
EWS
Lock and Unlock Requests
The  lock  and  unlock  information  arrives  at  the  GM  over  the  P-Bus  from  the  door  module
and is sent via the K-Bus to the EWS III (3.2) control module.  Thi

Page 18 of 30

BMW 8 SERIES 1996 E31 Drive Away Protection Syst 18
EWS
Clutch Switch
A Hall-Effect Switch is added to the clutch system to inform the EWS III (3.2) control mod-
ule of clutch status. Input from the switch replaces the signal from the Trans Range Se

Page 19 of 30

BMW 8 SERIES 1996 E31 Drive Away Protection Syst 19
EWS
EWS III (3.2) Control Module
Replacement  EWS III (3.2)  Control  Modules  must  be  ordered  VIN  specific.  The  EWS III
modules  contain  the  VIN  and  coding  from  the  factory  to  recog

Page 20 of 30

BMW 8 SERIES 1996 E31 Drive Away Protection Syst 20
EWS
EWS III (3.3)
EWS III (3.3) is installed in the 1998 E38 from 5/97 production, in the 1998 E39 from 9/97
production,  in  the E46beginning  of  production,  in  the E52and E53 beginning  of  pr

Page 21 of 30

BMW 8 SERIES 1996 E31 Drive Away Protection Syst 21
EWS
DME Control Module
The DME Control Module has changed in that it is not the source of the ISN but now only
stores the “Rolling Code”.  It compares the “Codes” to those sent to it by the

Page 22 of 30

BMW 8 SERIES 1996 E31 Drive Away Protection Syst 22
EWS
New to EWS III (3.3)
• While energizing the internal starter relay, the EWS III (3.3) module calculates a stored 
code from the “Rolling Code Table” and sends the calculated results to th

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BMW 8 SERIES 1996 E31 Drive Away Protection Syst 23
EWS
Replacement Procedures
Keys
Up  to  6  additional  keys  may  be  ordered  as  replacement  keys.  The  EWS  II  control  module
is codeable for only 10 keys (4 delivered with vehicle and 6 rep

Page 24 of 30

BMW 8 SERIES 1996 E31 Drive Away Protection Syst 24
EWS
EWS III D
EWS III  D  is  installed  on E36/7  beginning  of  production  99  Model  Year.  The  system
does not have a K-Bus input. 
Purpose of the System
The  purpose  of  the  EWS III  D  sy
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