Spray Nozzle Hose Heater Function - GF82.35-P-3009FH

Model 238 

Up To Model Year 2021 

With Code 874 (MAGIC VISION CONTROL incl. heated windshield washer system) 

Function requirements, general 

• Engine running or drivetrain operational for t > 3 s:

  The CDI control unit (N3/9) (diesel engine) or the ME-SFI control unit (N3/10) (gasoline engine) sends the "engine running" or "drive train operational" signal via the drive train CAN (CAN C1), powertrain control unit (N127), chassis FlexRay (Flex E), electronic ignition lock control unit (N73) and interior CAN (CAN B) to the front SAM control unit (N10/6).

Spray nozzle hose heater, general 

The spray nozzle hose heater prevents the washer fluid in the spray nozzles and in the spray nozzle hose from freezing.

Function sequence for spray nozzle hose heater 

The front SAM control unit switches on the spray nozzle hose heater at an outside temperature of T < 5 °C.

To do so, the front SAM control unit actuates the spray nozzle hose heater (R2/11) directly.

The outside temperature is detected by the outside temperature sensor (B14). The front SAM control unit directly reads in the signals of the outside temperature sensor and calculates the outside temperature.

If the outside temperature rises to T > 8 °C, the spray nozzle hose heater is switched off.

If the windshield washer system pump (M5/1) is actuated, actuation of the spray nozzle hose heater is interrupted. When the windshield washer system pump is no longer actuated, the spray nozzle hose heater is actuated again after t = 5 s.

The energy management can switch off the spray nozzle hose heater.

	Electrical function schematic for spray nozzle hose heater		PE82.35-P-2054-97DCA
	Overview of system components for windshield wiper system		GF82.30-P-9996FH