GF82.95-P-2018RCU Vehicle Remote Door Unlock, Function

GF82.95-P-2018RCU Vehicle Remote Door Unlock, Function
- with CODE (359) TELE AID emergency call system

Function requirements
^ Circuit 30
^ No undervoltage or overvoltage
^ Emergency call system authorized and operating properly
^ The vehicle-related vehicle remote door unlock service is separately authorized
^ An emergency call system control unit (N123/4) communication module authorized for the corresponding vehicle-related service is configured ex-factory with the telephone number of the corresponding service provider
^ The customer is registered and authorized at the service center
^ One mobile phone network is available in sufficient strength and quality
^ Telephone call by customer to service center and request for vehicle remote door unlock as well as identification (authorization) at service center
^ Actuation of the trunk lid external operation switch (S88/8) for at least t = 15 s at a time agreed upon with the service center
^ A higher-priority vehicle-related service is not active
^ Vehicle-related service Vehicle remote door unlock activated in EIS control unit (N73)

General
The vehicle remote door unlock function allows customers to have the vehicle unlocked remotely when the have locked the transmitter key (A8/1), for example, and a 2nd transmitter key is not available.

Function sequence
Actuation of the trunk lid external operation switch is received by the emergency call system control unit in the following way:
- Direct line
- Rear SAM control unit with fuse and relay module (N10/2)
- Interior CAN
- Central gateway control unit (N93)
- Diagnostic CAN

The emergency call system control unit then automatically transmits an SMS with the following data to the service center, via the communication module integrated into emergency call system control unit:
- Vehicle identification number (FIN)
- Vehicle model

The communication module integrated into the emergency call system control unit transmits the mobile phone signals or data in the following way:
- Direct line
- Left antenna amplifier module (A2/64)
- Direct line
- Rod antenna (A28)

The service center compares the data sent with the request and customer legitimization and if the data matches a "vehicle remote door unlock request" is sent to the vehicle.

the communication module integrated into the emergency call system control unit receives the "Vehicle remote door unlock request" and the mobile phone signals or data over the following path:
- Rod antenna
- Direct line
- Left antenna amplifier module
- Direct line

After receiving the "Vehicle remote door unlock request", the emergency call system control unit transfers the request to the EIS control unit over the following path:
- Diagnostic CAN
- Central gateway control unit
- Interior CAN

The EIS [EZS] control unit then initiates the unlocking of all vehicle doors and the unlocking of the trunk lid.

If the "Vehicle remote door unlock request" is refused by the service center because, for example, the trunk lid external operation switch was not actuated at the time agreed on or legitimation was incorrect, the vehicle remote door unlock function is disabled for t = 15 min.

The execution of the vehicle remote door unlock is displayed by a message in the instrument cluster (A1). Moreover, the red light-emitting diode (LED) in the SOS pushbutton switch (S93/3) flashes.

In the event of vehicle remote door unlock, other vehicle- related services (e.g. MB-Info call) are interrupted.

In the event of a failure of the rod antenna (defective e.g. due to rollover), the emergency call system control unit for transferring the mobile phone signals and data transmits and receives the mobile phone signals and data in the following way:
- Direct line
- Emergency call system antenna splitter (A2/25)
- Direct line
- Emergency call system left backup antenna (A2/54)
- Emergency call system right backup antenna (A2/55)

The maximum period of time between actuation of the trunk lid external operation switch and unlocking of all vehicle doors and trunk lid is t = 5 min (normally t = 1 min).