Spray Nozzle Hose Heater Function - GF82.35-S-3009TRA
Model 447.6/7/8
with code F48 (Heated windshield washer system)
Model 448.7/8
with code F48 (Heated windshield washer system)
Function requirements, general
- "Engine running" longer than 3 s
- Outside temperature < 5 °C
The CDI control unit (N3/33) (with engine 651.9) or the ME-SFI [ME] control unit (N3/34) (with engine 274) or the CDI control unit (N3/36) (with engine 622) sends the "Engine running" signal via chassis CAN (CAN E), electronic ignition lock (EZS) control unit (N73) and interior CAN (CAN B) to the signal acquisition and actuation module (SAM) control unit (N10/1).
The outside temperature is detected by the outside temperature sensor (B14). The signal acquisition and actuation module (SAM) control unit directly reads in the signals from the outside temperature sensor and calculates the outside temperature.
Spray nozzle hose heater, general
The spray nozzle hose heater (R2/11) prevents the washer fluid in the spray nozzles and in the spray nozzle hose from freezing.
Function sequence for spray nozzle hose heater
At an outside temperature of less than 5 °C , the signal acquisition and actuation module (SAM) control unit directly actuates the spray nozzle hose heater.
If the outside temperature rises to more than 8 °C , the spray nozzle hose heater is switched off.
When the windshield washer system pump (M5/4) is actuated, the 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 5 s.
The energy management can switch off the spray nozzle hose heater. Detailed information can be found in the separate "Energy management, function" function description.
| Electrical function schematic for spray nozzle hose heater | Model 448.7/8 with code F48 (Heated windshield washer system) | PE82.35-S-2054-97VDA | |
| Model 447.6/7/8 with code F48 (Heated windshield washer system) | PE82.35-S-2054-97TRA | ||
| Overview of system components, wiper system (WSA) | GF82.30-S-9997TRA |