GF80.57-P-6003FA | Component description for the EZS control unit | 22.2.08 |
MODEL 203.7 as of model year 09/YoM 08 model refinement package
P80.57-2177-04
N73 EIS [EZS] control unit
Location
The EIS control unit is located on the right, next to the steering column.
Task
The EIS control unit has the following tasks:
Control of functions
Reading in of signals
Evaluation of input factors
Actuation of components
Power supply for transmitter key (A8/1)
Control of functions
The EIS control unit actuates the following functions:
- Central locking (CL [ZV])
- Convenience feature (CF)
- Drive authorization stage 3 (DAS 3)
- Shiftlock function (with transmission 722)
Encrypted data exchange according to hash method for key identification
- Activation of individual circuits (c. 15, c. 15R, c. 50, c. 15X and c. 15C) depending on rotation angle
Rotation lock of transmitter key by locking lift solenoid
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Reading in of signals
The input factors are read in with the following connections:
Direct line
Interior CAN
Engine compartment CAN
Direct line
The EIS control unit communicates with the electric steering lock control unit (N26/5) via a serial data line.
Interior CAN
The EIS control unit reads in information relevant for function via the interior CAN.
Engine compartment CAN
The EIS control unit reads in information relevant for function via the engine compartment CAN.
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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 actuation of the components takes place via the following connections:
Direct line
Interior CAN
Engine compartment CAN
Direct line
The EIS control unit communicates with the electric steering lock control unit via a serial data line.
Interior CAN
The EIS control unit transmits the request for function-relevant actuations via the interior CAN.
Engine compartment CAN
The EIS control unit transmits the request for function-relevant actuations via engine compartment CAN.
Power supply for transmitter key
When the transmitter key is inserted into the EIS control unit, it switches on the inductive power transmission for power supply to the transmitter key.