Funções controladas pelo módulo

419-10- Multifunction Electronic Modules 419-10- DESCRIPTION AND OPERATION Smart Charge system In addition to the familiar functions, the Smart Charge system also performs the following functions: ‡ Automatic deactivation of non-critical high power electrical consumers when the battery voltage is low in order to reduce the level of current drawn. ‡ Automatic activation of non-critical high power electrical consumers when the battery voltage is excessively high in order to protect components which are sensitive to increased voltages. When the Smart Charge system is active, a slight variation in blower fan speed may be noticed. The battery charging current is optimized through continuous calculation of the battery temperature and monitoring of the alternator output voltage. By receiving the forwarded alternator load signal, the PCM is given early warning whenever an electric consumer is switched on or off. This means that the PCM receives information about imminent changes in the torque drawn by the alternator. By evaluating this information the PCM can provide a higher level of idling stability. The two remaining functions of the Smart Charge System are controlled by the BCM. Electrical consumers are switched off due to low voltage when the BCM determines (on the basis of the message received from the PCM on the CAN bus via the instrument cluster) that the battery voltage has dropped below the threshold. When the threshold for low battery voltage is reached the BCM automatically deactivates the following consumers - in this order and with a gap of 5 seconds between each: ‡ Electric booster heater (vehicles with diesel engines) ‡ Heated exterior mirrors and heated windscreen ‡ Heated rear window If the battery voltage rises back above the lower threshold then the BCM re-enables all of the electrical consumers which were previously disabled. They then have switched off status and must be switched back on by the driver. Electrical consumers are switched on due to excessively high voltage if the BCM determines that the battery voltage is above the threshold for overvoltage and the charge control lamp has been switched on. When the threshold is reached the BCM automatically activates the following consumers - in this order and with a gap of 5 seconds between each: ‡ Heated rear window ‡ Heated exterior mirrors and heated windscreen ‡ Electric booster heater (vehicles with diesel engines) If the battery voltage drops back below the threshold then the BCM automatically deactivates any consumers that were switched on. However, if they were switched on by the driver before the automatic activation, they will then be switched on again in turn with a 5-second time interval. Ignition overload protection The ignition overload protection intermittently disconnects certain circuits in order to restrict the current being drawn from the battery while the starter motor is operating. The position of the ignition switch is transmitted by the BCM on the MS CAN/HS CAN bus. The ignition overload protection relay is located in the battery junction box, and is activated by the BCM when the ignition switch is in position III. The activated ignition overload protection then switches off the following electrical consumers: ‡ Exterior lighting ‡ Windscreen/rear window wash/wipe systems ‡ Backup lamps Electric window regulators The ignition key must be in position "II" before the electric window regulators can be operated. The electric window regulator open or close the door windows when the switch is moved to the corresponding position. The movement of the window glass stops when the window regulator button is released or when the ignition key is moved from position "II" to position "I", "III" or "0". The driver door window can only be operated via the driver door switch; the other windows can be opened and closed via the driver door switch panel or the relevant door switch. If the window on the front passenger's door is operated via the switch on the switch panel in the driver's door, then the driver's door module