KEYLESS GO control unit, component description - GF80.61-P-4204CE

MODEL 204.0/2 with CODE (889) KEYLESS-GO as of model year 2009 /YoM 08

MODEL 204.3 with CODE (889) KEYLESS-GO.

MODEL 204.9 with CODE (889) KEYLESS-GO.

Shown on model 204.0

Fig 1: Identifying Keyless-Go Control Unit Components - Shown On Model 204.0

Courtesy of MERCEDES-BENZ USA

Location

The KEYLESS-GO control unit located behind the right paneling in the trunk on model 204.0/2/3. On model 204.9 the KEYLESS-GO control unit is located on the equipment carrier in the trunk.

Task

The KEYLESS-GO control unit has the following purposes:

Reading in of sensors, pickups and signals
Evaluation of input factors
Actuation of components

Reading in of sensors, pickups and signals

The input factors are read in via the following connections:

Direct line
Interior CAN (CAN B)

Direct line

The signals from the following components are read via direct lines:

Left front KEYLESS GO door handle (A17/1)
Right front KEYLESS GO door handle (A17/2)
Left rear KEYLESS-GO door handle (A17/3) (on model 204.0/2/9)
Right KEYLESS-GO door handle (A17/4) (on model 204.0/2/9)
Rear window antenna amplifier 1 (A2/71) (model 204.9)
TV 2 and KEYLESS-GO antenna amplifier (A94/2) (model 204.0/3)
KEYLESS-GO antenna amplifier (A94/4) (model 204.2)

Interior CAN

The signals are read in by the KEYLESS-GO control unit via the interior CAN. The functions that use these signals are described in the individual 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 relevant components are then actuated.

Actuation of components

The actuation of the components takes place via the following connections:

Direct line
Interior CAN

Direct line

The following components are actuated via direct lines:

trunk KEYLESS-GO antenna (A2/35)
Left door KEYLESS-GO antenna (A2/38) (model 204.3)
Left rear door KEYLESS-GO antenna (A2/39) (model 204.0/2/9)
Right door KEYLESS-GO antenna (A2/40) (model 204.3)
Right rear door KEYLESS-GO antenna (A2/41) (model 204.0/2/9)
interior KEYLESS-GO antenna (A2/61)
Additional on vehicles up to 2.12.09:
- Left front door opening assist motor (A85m2)
- Right front door opening assist motor (A85/1m2)
- Left rear door opening assist motor (A85/3m2)
- Right rear door opening assist motor (A85/4m2)

Interior CAN

The signals are transmitted by the KEYLESS-GO control unit via the interior CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Wiring diagram for Keyless Go control unit

PE80.61-P-2101-97FAA