Headlamp cleaning system (HCS), function - GF82.15-P-0002SX
MODEL 221.0/1 up to 31.5.07 with CODE (600) Headlamp cleaning system
Function requirements:
- C. 15R On
Manual actuation
Actuation of the HCS [SRA] switch is read in by the upper control panel control unit via the upper control panel LIN and forwarded via the interior CAN to the front SAM control unit.
The front SAM control unit then actuates the HCS [SRA] pump for approx. 1 sec. The water pressure generated in the process then acts against the return springs in both telescopic nozzles. The telescopic nozzles are extended, and in doing so they open the flaps in the bumper and spray washer fluid onto the headlamp lenses.
After the duty cycle has elapsed, the pressure in the washer fluid line drops again and the spring force acts on the nozzles moving them back into their starting position. The flaps in the bumper are closed by the spring action.
Pressing the HCS [SRA] switch again when a headlamp cleaning cycle is being performed has no effect. A further headlamp cleaning cycle can only be initiated after the previous one has ended.
Automatic actuation
The HCS [SRA] pump is automatically actuated after 15 operations of the windshield washer system and with the low beam or the standing lamps switched on. This is performed by the front SAM control unit.
Every time the windshield washer system is requested, the internal counter in the front SAM control unit is incremented by one until it reaches a value of "15", then the HCS [SRA] pump is actuated and the counter is reset to "0".
The internal counter is always reset to "0" with circuit 15 Off.
| Headlamp cleaning system (HCS), location of components | GF82.15-P-0002-03SX | ||
| Headlight cleaning system (HCS) component network | GF82.15-P-0002-04SX | ||
| Telescopic nozzle component description | GF82.15-P-2150SX | ||
| Windshield washer fluid pump, component description | M5/1 | GF82.35-P-5000SX | |
| Headlamp cleaning system (HCS [SRA]) pump - Component description | M5/2 | GF82.15-P-2160SX | |
| Driver-side SAM control unit with fuse and relay module, component description | N10/1 | GF54.21-P-6010SX | |
| Upper control panel control unit, component description | N72/1 | GF54.21-P-6040SX | |
| Electronic ignition/starter switch control unit (EIS), component description | N73 | GF80.57-P-6000SX | |
| Steering column module component description | N80 | GF54.21-P-6050SX | |
| Central gateway control unit, component description | N93 | GF54.21-P-4170SX | |
| Rotary light switch, component description | S1 | GF82.10-P-4106SX | |
| Combination switch, component description | S4 | GF82.30-P-5000SX |