(Headlamp Cleaning System, Function - GF82.15-P-3000GR)

Model 166 

up to Model year 2016 

with CODE 600 (Headlamp cleaning system) 

Function requirements, general 

• Low beam ON
• "Engine running" or "drive train operational" signal on

The SAM control unit (N10) generates the status "Low beams On" corresponding to the pending request.

The CDI control unit (N3/9) (diesel engine) or the ME-SFI [ME) control unit (N3/10) (gasoline engine) sends the "Engine running" or "Drivetrain operational" signal via chassis CAN 1 (CAN E1), electronic ignition lock control unit (N73) and interior CAN (CAN B) to the SAM control unit.

Headlamp cleaning system, general 

The headlamp cleaning system uses a high pressure water spray to clean the cover plates for the left front lamp unit (E1) and the right front lamp unit (E2).

Function sequence for headlamp cleaning system 

If the low beams are switched on and the windshield washer system is activated for the tenth time, then the cover plates for the front lamp units are cleaned by the headlamp cleaning system.

The steering column tube module control unit (N80) reads in the position of the combination switch (S4) directly and sends it over the chassis CAN 1, electronic ignition lock control unit and the interior CAN to the SAM control unit, which then actuates the headlamp cleaning system pump (M5/2). The telescopic nozzles are extended by the water pressure and the washer fluid cleans the cover plates on the front lamp units.

Following another ten wash requests, the headlamp cleaning system pump is actuated again.

The number of washing requests is recorded by a counter in the SAM control unit.

The counter is automatically reset when ten wash requests are reached or manually by switching off circuit 15. The circuit 15 status is sent by the electronic ignition lock control unit over the interior CAN to the SAM control unit.

	Electrical system function schematic for headlamp cleaning system (HCS)		PE82.15-P-2050-97NAA
	Overview of system components for windshield wiper system		GF82.30-P-9996GR