Headlamp cleaning system, function With code (600) Headlamp cleaning system - GF82.15-P-3000RC

MODEL 171.4 as of Model Year 09 /YoM 08 model refinement package with CODE (600) Headlamp cleaning system 

Function requirements, general  Low beam switched on

Headlamp cleaning system, general  The headlamp cleaning system cleans the headlamps automatically.

Function sequence for headlamp cleaning system  Following the fifth wash request by the combination switch (S4), which is read in by the steering column tube module (N80), the request is sent over the interior CAN to the driver SAM control unit with fuse and relay module (N10/1). In response, this actuates the HCS [SRA] pump (M5/2).

The HCS [SRA] pump is activated again after five washing requests from the combination switch. The number of wash requests is determined by a counter in the driver SAM control unit. An automatic counter reset occurs when the five wash requests have been reached or manually by switching circuit 15 off. The rotary light switch (S1), which is read in by the driver SAM control unit, is used by the driver SAM control unit to recognize that the low beams are switched on.