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

MODEL 216.3, 221.0 /1 up to Model Year 8

Fig 1: Locating EIS Control Unit

Courtesy of MERCEDES-BENZ USA

Location

The EIS control unit is located on the right, next to the steering column.

Task

The EIS control unit is the master control unit for the following functions:

Drive authorization stage 3 (DAS 3)
Central locking (CL [ZV])
Auxiliary door lock (only )

Task

Communication with transmitter key when transmitter (A8/1) is inserted, via infrared signals and inductive energy transmission.
Transmission of polling data to enable DAS 3 to:
- CDI control unit (N3/9) (on diesel engines) or ME control unit (N3/10) (on gasoline engines)
- Fully integrated transmission control (VGS) (Y3/8n4) control unit (with transmission 722.9) or ETC control unit (N15/3) (with transmission 722.6)
- Intelligent servo module for DIRECT SELECT (A80)
Rotation-angle-dependent activation of circuit 15R, 15, 50.
Output of circuit 15R, 15, 50 to interior CAN and chassis CAN.
Mechanically locking of transmitter key in turned position and mechanical return between start and driving position.
Request for selector lever position "P" via servo module for DIRECT SELECT when transmitter key is removed On vehicles with code (889) Keyless Go actuation is accomplished with driver door open.
Interface to Keyless go control unit (N69/5) via interior CAN for Keyless Go access and Keyless Go operation (with code (889) Keyless Go).
Mechanical sensing and read-in of Keyless Go start/stop button (S2/3) (with code (889) Keyless Go).

The limit switch for circuit 15R and 15 are not installed in the EIS control unit. The rear SAM control unit with fuse and relay module (N10/2) switches circuit 15R and the front SAM control unit with fuse and relay module (N10/1) switches circuit 15.

Discrete inputs

Circuit 30
Circuit 31
Circuit 30 and circuit 31 (redundant supply)

with code (889) Keyless Go:

Right rotary tumbler switch (A85/1s1) on model 216 or Right front rotary tumbler switch (A85/1s1) on model 221
Left rotary tumbler switch (A85s1) on model 216 or Left front rotary tumbler switch (A85s1) on model 221

Discrete outputs

Emergency path to servo module for DIRECT SELECT
Signal "Transmitter key removed" to vehicle power supply control unit (N82/1)

CAN signals

The EIS control unit is a subscriber on the interior CAN and chassis CAN. However, it is not a gateway.