immobilizer BMW X5 2002 E53 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.
General Module
The GM receives the High/Low signal from the door lock switch and outputs a High/Low
signal to the Starter Immobilization Relay. A High signal indicates the vehicle is in Double
Lock.
Board Computer
The Board Computer outputs a High/Low signal to the Starter Immobilization Relay. A High
signal indicates the Code function is active.
Transmission Range Switch
The Transmission Range Switch input with automatic transmission equipped vehicles
allows the Starter Immobilization Relay to provide a Neutral safety switch function. A High
signal from the Trans range switch indicates the transmission is in Park or Neutral. A Low
signal indicates the transmission is in a drive gear and will prevent starter operation.
DME
The DME is both an input device (after 6/94) and an output device of the Starter
Immobilization Relay.
Input
Starting with production 6/94, the DME “TD” (engine speed) signal was added to the inputs
of the Starter Immobilization Relay. This additional input allows the relay to provide a starter
protection feature. The internal relay contact (starter operation) opens if the TD signal
exceeds 60 Hz which equals the following engine speeds:
8510103
EWS I -
Starter
Immobilizer
Relay
After 6/94
Driveaway
Protection
Signal
Range
Switch
Code

26
EWS
System Introduced Model FeaturesOne
Touch
Starting
Drive Away
Protection9/93 - 12/93 AllInjection/Ignition
Disabled if car
In Double lockNo
EWS I 1/94 - 1/95 AllStarter
Immobilizer
Injection/Ignition
DisableNo
EWS IIE-36 To End of
Production
E36/7To MY
1998
E-34 To End of
Production
E-38 To M.Y
1997
E-38 To 3/97
Production
EWS III 9/96 E 38 MY 97
3.2
E38 MY 1998
From 5/97
Production
E39 From 9/97
ProductionE39 From 3/97
ProductionTransponder
Key
Starter
Interlock
DME - EWS
ISN CodeE38 Late MY
1997
Transponder Key
Starter Interlock
IDME-EWS
ISN Code
K-BusYe s
V-12 and V-8
Only
EWS III
3.35/97Transponder Key
Starter Interlock
K-Bus
DME-EWS
Rolling CodeYe s
V-12 and V-8
Only
EWS
EWS III D MY 1999 Z3 OnlyTransponder Key
Starter Interlock
DME-EWS
Rolling CodeNo 1/95
85101103aa