Keyless Entry: Description and Operation

GF80.61-P-4204RD Component Description For KEYLESS-GO Control Unit
MODEL 172.4
- with CODE (889) Keyless-Go.





N69/5 KEYLESS-GO control unit

Location
The KEYLESS-GO control unit is located behind the right paneling in the trunk.

Task
The KEYLESS-GO control unit has the following purposes:
^ Reading in of sensors
^ Evaluation of input factors
^ Actuation of components

Reading in of sensors
The input factors are read in via the following connections:
^ Direct line
^ Interior CAN (CAN B)

Direct line
The signals from the following components are read via a direct line:
- Left KEYLESS-GO door handle (A17/1)
- Right KEYLESS-GO door handle (A17/2)
- Rear Keyless Go antenna (A97)

Interior CAN
The signals are read in by the KEYLESS-GO control unit via the interior CAN.
The functions resulting therefrom are described in the corresponding function descriptions (see block diagram or function schematic).

Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components
The following components are actuated via a direct line:
- trunk KEYLESS-GO antenna (A2/35)
- Left door Keyless Go antenna (A2/38)
- Right door Keyless Go antenna (A2/40)
- interior KEYLESS-GO antenna (A2/61)