Stop lamp actuation, function - GF82.10-P-3010GZ
MODEL 164.1 /8
General brake light actuation function sequence
The brake light actuation is comprised of several subfunctions.
These are:
- Static brake light actuation
- Flashing brake light actuation (adaptive brake lights)
Static brake light actuation
Function requirements:
- Circuit 15 On
Static brake light actuation function sequence
The operation of the service brake is recognized by the BAS release switch (A7/7s1) at the BAS brake booster and transmitted to the ESP control unit.
The ESP control unit transmits this message via CAN-C to the central gateway control unit, which routes the signal to CAN-B and forwards it to the rear SAM control unit.
The rear SAM control unit receives this signal redundantly via circuit 54 directly from the ESP control unit.
Depending on the equipment fitted, the rear SAM control unit actuates the following components:
- Stop lamp
- Taillights, side-marker lamp, parking lights
- Center high-mounted stop lamp
- Brake lights and taillights
- Left and right brake lights on the trailer
(for code (550) Trailer hitch)
Flashing brake light actuation (adaptive brake lights)
Function requirements
- Circuit 15 On
- Brake applied
- Hazard warning flashing not active
- Vehicle speed v > 50 km/h and
- Vehicle deceleration a > 7.5 m/s
Function sequence for flashing brake light actuation (adaptive brake lights)
The vehicle deceleration and the speed are determined by the ESP control unit. In the event of an emergency stop, the ESP control unit sends a corresponding signal to CAN-C.
This is routed to CAN-B via the central gateway control unit and received by the rear SAM control unit.
For the duration of the signal (t > 1 s), the rear SAM control unit actuates the following components at a frequency of f = 5 Hz, depending on the equipment fitted.
Without code (849) Spare tire holder/spare tire:
- Stop lamp
- Taillights, side-marker lamp, parking lights
- Center high-mounted stop lamp
- update service. Brake lights and taillights
The emergency stop signal is reset if one of the following preconditions is fulfilled:
- Brake released
- C. 15 OFF
- Vehicle speed v < 5 km/h
- Brake Assist not active
and vehicle deceleration a < 6.5 m/s2
| BAS brake booster, component description | A7/7 | GF42.31-P-4004GZ |
| Wheel RPM sensor, component description | L6/1, L6/2, L6/3, L6/4 | GF42.45-P-5134GZ |
| Rear SAM control unit, component description | N10/8 | GF54.21-P-7030GZ |
| ESP control unit, component description | N47-5 | GF42.45-P-5118GZ |
| Electronic ignition/starter switch control unit (EIS), component description | N73 | GF80.57-P-6000GZ |
| Central gateway control unit, component description | N93 | GF54.21-P-4170GZ |