Stop light actuation function - GF82.10-P-3010A

MODELS 215.###, 220.02# /06# /07# /12# /16# /17# 1# 

Fig 1: Stop Light Actuation Function Diagram

Operating procedure 

1. Basic requirements:
   • The electronic key in the ignition and starter switch is set to position "2" (terminal 15) and the service brake is actuated.
2. The stop lamp switch's (S9/1) switching contact feeds voltage to the traction systems control module (N47) and the EIS control module (N73).
3. The EIS control module (N73) transforms the voltage signal and sends a "Stop lamp ON"  signal over the databus (1) to the rear SAM control module (N10/8). Simultaneously, the traction systems control module (N47) feeds the stop lamp switch's voltage signal direct to the rear SAM control module.

   The direct actuation of the rear SAM control module by the traction systems control module is intended to prevent any time delay in forwarding the stop lamp signal from the EIS control module over the databus.

4. The rear SAM control module actuates the stop lamp in the left and right-hand tail lamps (E3e4 and E4e4) and the center high mounted stop lamp (E21).
5. For trailer couplings the "Stop lamp ON"  signal from the rear SAM control module is also sent to the trailer recognition control module (N28/1) and current for the trailer's stop lamps switched to the trailer hitch socket, 13-pin (X58).

   The "Stop lamp ON" message to the trailer recognition control module ensues over the databus (1) and simultaneously also by way of a direct voltage signal.

   Next to its actual specified task, the actuation of the stop lamps, the stop lamp signal is also of significance for other functional areas in the vehicle. Thus the stop lamp signal from the EIS control module and the traction systems control module is sent over the databus (1 and 2)

   • from the (ME-SFI) control module (N3/10),
   • from the electronic selector lever control module (N15/5),
   • from the DTR control module (N63/1),
   • from the Keyless Go control module (N69/5),
   • from the headlamp range adjustment control module (N71),
   • from brake Assist (BAS)

     and

   • from the electronic transmission control (ETC)

   where it is received, analyzed and used for the actuation of system-specific functions.