which model and built year? Drive Away Protection System (EWS) explained https://www.europeantransmissions.co...0EWS%20BMW.pdf
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 Protection system was to reduce vehicle theft as mandated by the European Insurance Commission to combat the high theft rate in European Countries.
This first version of the Drive Away Protection System added a circuit from the General Module to the DME. The added circuit was spliced into the existing code function from the Board Computer (BC) to the DME. The components of the Drive Away Protection System are:
• Door Lock Switch
• General Module
• Board Computer
• DME
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 European Insurance Commission required additional changes from the previous system. An additional component was added called the Starter Immobilization Relay. This relay module provides added theft prevention and safety features. At the time of introduction the system was referred to as Electronic Drive Away Protection which in German is Electronische Wegfahrsperre or EWS. The EWS I system consisted of the following components:
• Starter Immobilization Relay
• Door Lock Cylinders and Switch
• General Module
• Board Computer (if equipped)
• Transmission Range Switch
• DME Engine Speed Signal (Beginning 6/94 Production)
• DWA (E31)
Starter Immobilization Relay
The Starter Immobilization Relay was installed on E31, E34 and E36 vehicles.
It was in the following location:
E36 -In the relay carrier to the left of the steering column.
E31/E34 -In the “A” pillar above the footwell kick panel speaker.
The Starter Immobilization Relay functions as a “Smart Relay”, a relay which receives inputs from various sources looking at the proper combination of input signals before activating a component, in this case the starter.
The Starter Immobilization Relay receives input from:
• Ignition Switch • General Module • Board Computer • Trans Range Switch • DME (>6/94)
And processes output to: • Starter • DME
EWS II
Starting with 1/95 production, 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 the European Insurance Commission regulations.
EWS II was installed on E31, E34, E36, E38 and E39 vehicles. Major components of the EWS II system are:
• Key with Transponder
• Ring Antenna
• Transmitter/Receiver Module
• EWS II Control Module
• DME Control Module
EWS III (3.2)
The 1997 Model Year E38 is equipped with EWS III (3.2) drive away protection. E39 vehicles produced 3/97 and later are also equipped with EWS III (3.2).
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 E46 beginning of production, in the E52 and E53 beginning of production.
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.