GF30.30-P-3002FL Permanent Speed Limiter, Function

GF30.30-P-3002FL Permanent Speed Limiter, Function
- with CODE (440) Cruise control



Function requirements of Permanent Speed Limiter in general
^ Circuit 15 ON (ignition ON)
^ Cruise control coded in the front SAM control unit with fuse and relay module (N10/1)

Permanent Speed Limiter, general
The permanent speed limiter (also called the LIMITER or SPEEDTRONIC) is an additional function of the cruise control, and is integrated in the Electronic Stability Program control unit (N30/4).

The Permanent Speed Limiter allows the driver to limit the maximum speed of the vehicle (e.g. for winter tires with a lower permissible maximum speed).

The specified maximum speed is transmitted by the Electronic Stability Program control unit via the chassis CAN (CAN E) to the instrument cluster.A1

The ESP control unit sends the request to decelerate the vehicle via the chassis CAN to the CDI control unit (N3/9) (for diesel engines) or to the ME-SFI [ME] control unit (N3/10) (for gasoline engines).

A switching request at the automatic transmission is transmitted from the Electronic Stability Program control unit via the chassis CAN and drive train CAN (CAN C) to the electronic transmission control control unit (N15/3) (for transmission 722.6) or to the fully integrated transmission control controller unit (Y3/8) (for transmission 722.9).

Function sequence for Permanent Speed Limiter
The engine performance is reduced if the vehicle approaches the set maximum speed.
If this is inadequate, the service brake is actuated proportionately and if necessary, the automatic transmission shifts to a lower gear so that the set maximum speed is not exceeded (e.g. in case of steep declivity).

The Permanent Speed Limiter is switched on/off using the LH multifunction steering wheel button group (S110) over the "Settings" menu, sub-menu "Vehicle",menu item "Speed limiting (winter tires)" in the instrument cluster.

The maximum speed can be set in 10 km/h increments from 160 to 240 km/h.

If the Permanent Speed Limiter is switched on, it is activated at the same time and can be switched off or deactivated again only through the menu in the instrument cluster.

A warning message is displayed in the multifunction display (A1p13) at about 10 km/h under the set maximum speed.

While the Permanent Speed Limiter is active, the cruise control or Variable Speed Limiter (except code (494) USA version) can be use independently of the set maximum speed, up to a maximum of 200 km/h.