Funções controladas pelo módulo

419-10-7 Multifunction Electronic Modules 419-10-7 DESCRIPTION AND OPERATION 1 E139967 The rain sensor (1) consists of an opto-electronic measuring and evaluation circuit. The sensor can calculate the amount of precipitation falling on the windshield and request that the windshield wipers are switched on. On the basis of the information provided by the rain sensor, the windshield wipers are then set to the required wipe speed by the generic electronic module (BCM). Mode of operation of the rain sensor 1 2 4 3 E40970 Item Description 1 Raindrop 2 LED 3 Lens 4 Photodiode The rain sensor consists of three optical components: ‡ an LED ‡ D SKRWRGLRGH ‡ a lens The photodiode emits an infrared light beam of known intensity; the emitted light exits through the lens and is reflected by the windshield. The reflected light beam enters back through the lens and then reaches the photodiode. The corresponding value taken without moisture on the windshield is used as the reference value for the automatic calibration process. Subsequent deviations from this value cause the windshield wipers to be switched on. If rain lands on the windshield then the light reflected by the windshield has a lower intensity. This loss of intensity is registered by the photodiode and, proportionally to the loss of intensity, the module switches on the windshield wipers with the required wipe speed (in intermittent or continuous mode). When the automatic wipe function is switched on (wiper lever to intermittent position) the wipers are only activated automatically if the rain sensor registers water on the windshield. It is not necessary to calibrate the rain sensor, as this has already been done at the factory. The sensitivity of the rain sensor can be changed by adjusting the control resistor for the intermittent mode of the windshield wipers. ‡ Adjusting ring position - wide symbol: High sensitivity œ The wipers wipe even if only a small amount of water has been measured on the windshield. ‡ Adjusting ring position - narrow symbol: Low sensitivity œ The wipers only wipe if a large amount of water has been measured on the windshield. Central door locking Locking/unlocking œ central locking The central locking system locks all doors, so that none of these can be opened from the outside of the vehicle. The door lock motors are directly activated by the BCM.