EWS II Control Module
The EWS II Control Module is linked to the BC, GM, DME, Trans Range switch and the starter for drive away protection operation. The module incorporates an integral starter relay and stores data and codes for communication with the transponder chip.
The function of the EWS II module is to provide improved drive away protection for the vehicle and it incorporates many features of previous systems:
- Lock out of the starter when the code function of the BC is set.
- Disable injection and ignition through the DME.
- Prevent starter engagement with engine running.
- Recognition of Park/Neutral position with automatic transmission.
New features that have been added:
- Disable injection, ignition and starter operation until a correct key is recognized.
- EWS and DME synchronization through the use of the ISN.
- Release of double lock when a correctly coded key is switched on.
The EWS II control module stores the following data for the key transponder inter-link:
- Key identification code- up to 10 keys.
- Key password.
- Changing code- up to 10 keys.
Workshop Hint:
On E31, E36, E38 and E39 models the EWS II control module is located behind the glove box in the electrical carrier.
On E34 models the module is located on the drivers side of the vehicle behind the knee bolster.
Typical component locations:
E36 shown