Funções controladas pelo módulo

419-10-4 Multifunction Electronic Modules 419-10-4 DESCRIPTION AND OPERATION microcontroller. If this control signal is not sent, the BCM goes into emergency running mode after a specified time. In this case, vehicle electrical functions will be restricted to the following: ‡ Stop light will function normally. ‡ Horn will function normally. ‡ Dipped beam and position lamps will be switched on permanently, irrespective of light switch position. ‡ Windscreen wipers will perform continuous wiping at normal wipe speed, irrespective of wiper switch position. The emergency running mode is switched off when the ignition is switched to "0". When the ignition is switched on again, the BCM will try to recover. If recovery fails, the vehicle cannot be started. Light switch If the ignition lock is in position "0" for more than 3 minutes then the front fog lamps, rear fog lamp and the main beam headlamps are deactivated when the ignition is next switched on (if they were previously activated). Combined rain sensor/light sensor The combined rain sensor/light sensor is attached to the windshield, near the interior rear view mirror. 1 2 3 E40968 Item Description 1 Lens 2 Front light sensor 3 Ambient light sensor The ambient light sensor determines the general light intensity. For this purpose, it detects the light over as wide an angle as possible, without taking the direction of incidence into account. The front light sensor determines the light intensity directly in front of the vehicle. Sunload Sensor E140027 The sunload sensor is positioned centrally on the dashboard. The sunload sensor measures the intensity of the sunlight reaching the vehicle. Automatic headlamps The low beams, side lamps, license plate lamps as well as the instrument cluster and instrument panel illumination are switched on automatically if all the following conditions are met: ‡ Ignition switch in the "II" or "III" position ‡ Light switch in the "AUTO" position ‡ Detected ambient light conditions below a stored threshold value They are switched on or off by the BCM depending on the input signals of the combined rain sensor/light sensor(s). If both the ambient light sensor and the front light sensor simultaneously detect a sudden reduction in light intensity then algorithm-based calculations are performed to determine that the vehicle has entered a tunnel, multi-storey car park or a long underpass. In this type of case a request to switch on the exterior lights and the display lamps in the instrument cluster is transmitted to the BCM. If the vehicle is suddenly thrown into the shade by a large truck, the two sensors will register different light intensities. In this case, the algorithm-based