Electronic ignition/starter switch control unit (EIS), component description - GF80.57-P-6000GZ

MODEL 164

Fig 1: Identifying EIS [EZS] Control Unit

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location

The EIS control unit is located in the cockpit on the right next the steering column below the instrument cluster (A1).

Task

Drive authorization functions according to drive authorization system stage 3 (FBS 3)
Control of central locking (CL)
Infrared (IR) communication with transmitter key (A8/1) in inserted state and inductive energy transmission onto transmitter key
Transmission of request data (key identification) for releasing the ME-SFI control unit (N3/10) and the intelligent servo module for DIRECT SELECT (A80) according to DAS 3
Rotation-angle dependent activation of circuits 15R, 15, 50
Output of terminals to controller area network bus class C (engine compartment) (CAN-C) and controller area network bus class B (interior compartment) (CAN-B)
Locking transmitter key in turned position
Transmitter key returns from start to drive position
Prevention of turning an invalid transmitter (rotary lock) (up to 31.5.07)
Assignment of transmitter key to memory functions
Key-P-function: When the transmitter key is removed, the EIS control module requests the intelligent servo module for DIRECT SELECT to shift to drive stage "P" via the CAN-C

On vehicles with code (889) Keyless Go:

Key-P-function:

When the driver door is open, the EIS control module requests the intelligent servo module for DIRECT SELECT to shift to drive stage "P" via the CAN-C.

Interface to keyless go control unit (N69/5) via CAN-B for keyless go access and keyless go operation
Holding and reading in start/stop button for keyless go operation

General information:

The limit switch for c. 15R and c. 15 are not installed in the EIS control unit. The rear SAM control unit (N10/8) switches c. 15R and the front SAM control unit (N10) switches c. 15.
The "Keyless lock function" is replaced with "key-P function".
The "Remote door unlock" function is enabled in the EIS control unit by variant coding
The EIS control unit is not a gateway.

As of 1.6.07 the rotary lock in the EIS control module is eliminated. It is not possible to active any terminals with an incorrect transmitter key or a transmitter key which is not functioning properly. The note "Key does not belong to vehicle" appears in the instrument cluster.