Keyless Entry Transmitter: Description and Operation

Remote Controls (Keys)




The Remote Control is comprised of a radio frequency transponder (transmitter+receiver), an EWS transponder and an electronic evaluation unit.

The voltage supply of the Remote Control is provided by an integrated rechargeable battery which is charged during vehicle operation via a 125 kHz interface in the ignition switch (ZAS receptacle) as from terminal R.

The rechargeable battery voltage is monitored independently by the Remote Control and signaled to the CAS.

Up to four Remote Controls may be assigned to the vehicle for remote services (not EWS which may have up to 10). There is no procedure necessary for initialization, once the EWS transponder of the Remote Control is identified by the CAS, the radio frequency transponder is also logged in as valid.

The range of the Remote Control can vary to a great extent. This is dependent on the location of the Remote Control in relation to vehicle and other physical conditions.







Remote Control Functions

- Double lock/unlock: Press the desired button once.
- Convenience open: Press and hold the unlock button. The operation of opening the windows and sunroof will stop when the button is released.
- Open trunk: Press the trunk open button.
- DWA arming/disarming: Automatically performed when locking or unlocking as long as the criteria for arming is fulfilled.
- Disarm interior protection and tilt sensor: Press lock button again within 10s of locking/arming.
- Interior lights on (search mode): Press lock button with a locked vehicle.
- Panic: Press panic button regardless of vehicle lock status.