Je bent mijn pagina's lange EWS hoofdstuk niet vergeten he?
Ik werd toen helemaal gek van het sporadisch niet starten, verkeerde diagnoses en het strooien van geld. Probeer zoveel mogelijk zelf uit te sluiten of onderzoeken. Ik heb aardig wat links nog in mijn geschiedenis m.b.t. het EWS systeem en screenshots in de bovenstaande hyperlink. Uiteindelijk was het Aaron die het probleem gelijk had gevonden bij mij: EWS module was stuk. Module zit volgens mij op 80,- EUR ex. BTW en 1,5 a 2 uurtjes arbeid om te programmeren.
EWS (3.3)
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
System Components
Door Lock Switch
The door lock switch provides a 12V (High) signal to the GM when the vehicle is locked from the outside. The switch also provides a Low signal to the GM when the vehicle is unlocked.
General Module
The GM receives the lock and unlock signals from the door lock switch and signals the DME with a 12V High signal when the vehicle is double locked or with a Low signal when this vehicle is unlocked.
Board Computer
The Board Computer (BC) through its’ code function provides a High signal to the DME to disallow vehicle operation or a Low signal to allow vehicle operation.
DME
The DME looks for a High/Low signal from the BC or GM and dependent on the signal, it will either allow or prevent vehicle operation.
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” match the drive away protection is released and injection and igni- tion are enabled and the engine starts.
If the “Codes” do NOT match, 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.
Source:
http://www.computersolutions.cn/blog/wp ... MW_EWS.pdf