Electronic ignition/starter switch control unit (EIS), component description

P80.57-2090-04

N73 EIS [EZS] control unit

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

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 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

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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.