Component description for the EZS control unit - GF80.57-P-6003GM
MODEL 164.1 as of model year 09/YoM 08 model refinement package
MODEL 164.8, 251.0/1 as of model year 09/YoM 08
Illustrated on model 251.0
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)
- Interface to KEYLESS-GO control unit (N69/5) (with code (889) Keyless Go)
Control of functions
The EIS control unit actuates the following functions:
- Central locking (CL [ZV])
- Convenience feature (CF)
- Drive authorization stage 3 (DAS 3)
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
- Key-P function: When the transmitter key is removed, the request to shift to gear range "P" is transmitted by the EIS control unit to the intelligent servo module for DIRECT SELECT (A80) via the engine compartment CAN.
- Auto-N function: When the engine is running and the transmission is shifted to gear ranges "D" or "R", and the transmitter key is turned to position A (c. 15C), the transmission shifts automatically to gear range "N". The request to shift to gear range "N" is transmitted by the EIS control unit and is sent to the intelligent servo module for DIRECT SELECT via the engine compartment CAN.
- Supplemented AUTO P function: If, after expiration of the auto-N function, the driver door or passenger door is opened, the transmission shifts automatically to the rear range "P". The request to shift to gear range "P" is transmitted by the EIS control unit and is sent to the intelligent servo module for DIRECT SELECT via the engine compartment CAN.
Reading in of signals
The input factors are read in with the following connections:
- Direct line
- Interior CAN
- Engine compartment CAN
Direct line
The following signals are read in via a direct line:
- Circuit 30
- Circuit 31 (ground)
- C. 30b (backup battery supply)
- C. 31 emergency supply
- Left front door rotary tumbler microswitch (M14/6s1), status
Interior CAN
The signals are read in by the EIS control unit via the interior CAN. The functions resulting therefrom, are described in the corresponding function descriptions (see block diagram or function schematic).
Engine compartment CAN
The signals are read in by the EIS control unit via the engine compartment 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 affected components are then actuated.
Actuation of components
Components are actuated with the following lines:
- Direct line
- Interior CAN
- Engine compartment CAN
Direct line
The following components are actuated via a direct line:
- Emergency path to intelligent servo module for DIRECT SELECT
Interior CAN
The signals are transmitted by the EIS control unit via the interior CAN. The functions resulting therefrom, are described in the corresponding function descriptions (see block diagram or function schematic).
Engine compartment CAN
The signals transmitted by the EIS control unit via the engine compartment CAN. The functions resulting therefrom, are described in the corresponding function descriptions (see block diagram or function schematic).
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.
Interface KEYLESS GO control unit
- Interface to Keyless Go control module via interior CAN for Keyless Go access and Keyless-Go operation
- Mechanical sensing and read-in of KEYLESS-GO start/stop button (S2/3) for KEYLESS-GO operation
| Wiring diagram for electronic ignition switch (EIS) control unit | Model 164 | PE54.21-P-2104-99MAA | |
| Model 251 | PE54.21-P-2104-99RAA |