1999 BMW 3 SERIES ignition

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 recognize the key codes. Use of
EWS III modules from other vehicles will result in the keys not being recognized.
The EWS III (3.2) control module stores the ZCS coding and must be coded at time of
installation. The module must be aligned with the DME so that it stores the correct ISN.
There is no limit to the number of times the ISN may be changed in the EWS III module.
DME Control Module
DME Control Modules are “off the shelf” parts requiring programming during installation.
The ISN of the DME is not changeable and must be transferred to the EWS III (3.2) mod-
ule.
Key Activation
Keys that are lost or stolen may be deactivated or made to not operate the starter func-
tions. The SERVICE FUNCTIONS of the DISplus or MoDic for EWS III (3.2) contains a
“Bar/Release Code” function that activates and deactivates keys of the EWS III (3.2). Any
key may be “Barred” except the key in the ignition at the time of deactivation. The lost or
stolen key can be identified by the identification of the remaining keys.
There is no limit to the number of times a key can be activated/deactivated.
Notes

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 the DME.
• On receipt of the “Rolling Code” from the EWS III (3.3) the DME calculates it’s own
stored code and compares its results with the code it received from the EWS III (3.3).
If the “Codes” matchthe drive away protection is released and injection and igni-
tion are enabled and the engine starts.
If the “Codes” do NOTmatch, the DME “rolls forward” to the next code according
to the “Rolling Code Table” and makes the same calculations. The DME continues
this “forward roll” up to a maximum of 200 times or until a match is found. Failure
to find a match will result in the engine cranking but not starting.
• When the ignition is switched off and no engine RPM is present in both the DME and
the EWS III (3.3) control module each module will automatically “roll forward” to the next
predetermined code based on the “Rolling Code Table”. This new code is used for the
next starting sequence.
85101318510135
Workshop Hint:
If during diagnosis the key is switched on while the
DME or EWS modules are “Disconnected”, the align-
ment procedure will need to be carried out.
The“Alignment”procedure may be carried out an
umlimited number of times.

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 replacement).
EWS III (3.3) Control Module
Replacement EWS III (3.3) Control Modules are ordered VIN specific. The module is
received with the same “Rolling Code Table” as the original module. Once ZCS coded, the
DISplus software “resets” the current rolling code in the DME back to “Rolling Code” #1,
providing synchronization of both modules.
DME Control Modules
Replacement DME Control Modules are “off the shelf” and must be programmed for the
specific vehicle. After programming the DISplus software informs the EWS III (3.3) control
module that a new DME has been installed. The next time the ignition is switched on, the
EWS III (3.3) module will send the entire “Rolling Code Table” to the DME and reset it to
“Rolling Code” #1.
The DME will automatically burn the “Rolling Code Table” into its memory.
Once the table
has been burned into the DME memory it can NOT
be changed. For this reason once a
DME is “Married” to the vehicle it will not work in any other vehicle.
Under certain condition “Alignment” of the DME and EWS III (3.3) modules may still be nec-
essary. The alignment procedure only resets the code table to code #1 it does not change
the “Rolling Code Table”.
Key Activation
Keys that are lost or stolen may be deactivated or made to not operate the starter func-
tions. The SERVICE FUNCTIONS of the DISplus or MoDic for EWS III (3.3) contains a
“bar/release code” function that activates and deactivates keys of the EWS III (3.3). Any
key may be “Barred” except the key in the ignition at the time of deactivation. The lost or
stolen key can be identified by the identification of the remaining keys.
There is no limit to the number of times a key can be activated/deactivated.
Workshop Hint:
While checking key operation, don’t forget to
wait 10 seconds before inserting the next key.
You can not BARthe key in the ignition.Workshop Hint:
A dead key battery does not affect vehicle start-
ing.
Keys without replaceable batteries are not
charged if the ignition is in the KLO (Off) posi-
tion.

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 system is to provide the highest level of drive away protec-
tion available to vehicles without a K-Bus. The input side of the control module functions
the same as an EWS II (no bus inputs) system with the exception of an integrated EWS
module and transmitter/receiver module. The output side functions similar to an EWS III
(3.3) system with “Rolling codes”. The EWS III D control module is on the D-Bus for diag-
nostics.
Individual component inputs and system operation is the same as the mentioned previous
systems.
Replacement Procedures
Keys
Up to 6 additional keys may be ordered as replacement keys. The EWS III D control mod-
ule is codeable for only 10 keys (4 delivered with vehicle and 6 replacement).
EWS III D Control Module
Replacement EWS III D Control Modules are ordered VIN specific. The module is received
with the same “Rolling Code Table” as the original module. Once ZCS codes, the DISplus
software “resets” the current rolling code in the DME back to “Rolling Code” #1, providing
synchronization of both modules.
DME Control Modules
Replacement DME Control Modules are “off the shelf” and must be programmed for the
specific vehicle. After programming the DISplus software informs the EWS III D control
module that a new DME has been installed. The next time the ignition is switched on, the
EWS III D module will send the entire “Rolling Code Table” to the DME and reset it to
“Rolling Code” #1.
The DME will automatically burn the “Rolling Code Table” into its memory.
Once the table
has been burned into the DME memory it can NOT
be changed. For this reason once a
DME is “Married” to the vehicle it will not work in any other vehicle.

25
EWS
Under certain condition “Alignment” of the DME and EWS III D modules may still be nec-
essary. The alignment procedure only resets the code table to code #1 it does not change
the “Rolling Code Table”.
Key Activation
Keys that are lost or stolen may be deactivated or made to not operate the starter func-
tions. The SERVICE FUNCTIONS of the DISplus or MoDic for EWS III D contains a
“bar/release code” function that activates and deactivates keys of the EWS III D. Any key
may be “Barred” except the key in the ignition at the time of deactivation. The lost or stolen
key can be identified by the identification of the remaining keys.
There is no limit to the number of times a key can be activated/deactivated.
8510130
Pin Assignments
EWS III D
Workshop Hint:
With E46 Style diagnostics, check the following status’ in Diagnosis, Control Unit Functions, EWS:
• Starter Status:
Park/Neutral, BC Code active, Engine Speed, Double lock status, Starter Enabled
• Key Status:
Transmits, Changing code, Key I.D., Key number, Key Password, Key disabled
• DME Wire Status
• Selector lever/Clutch Status • Central Locking Status • Input Power •BC Code via K-Bus

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