MrT Posted January 31, 2004 Report Posted January 31, 2004 What is special about multifunction fuses and why must they be changed by a main dealer? How do you get to these level3 fuses to check them? There seems to be a hinge mechanism on the fuse box but I cannot see how to release it. (2001 model) Quote
seatkid Posted January 31, 2004 Report Posted January 31, 2004 Although the module hinges down, access to the printed circuit board requires you to remove the plastic cover through which the connectors pass. There not really fuses - its an electronic "brain" in the galaxy and can turn functions on/off electronically. So you can't check it in the way you check a fuse. It can be tested on Fords WDS diagnostic system. Module Controlled Functions Generic Electronic Module (GEM) The third level of the central junction box consists of the generic electronic module (GEM) and also functions as fuse panel. General The GEM is the electronic control centre of the Galaxy. Depending upon model version, it is responsible for the function of all standard timer controls (wiper interval, heated rear window etc.) and its function is similar to that of the central timer module. With the introduction of the GEM, special timer relays are no longer fitted and only the simple power relays are used. In addition, the GEM is responsible for the central locking function, the electrically-operated window regulators, the central unlocking / locking function of the remote control, the anti-theft warning system with ultrasonic monitoring and the bulb check system. Furthermore, in conjunction with the relay panel, almost all fuses are housed in the GEM. Timer control of wiper interval and washer system The GEM controls the wiper interval and the windscreen washer function. In case of failure of the GEM, operation of the windscreen wiper in stages I and II is still possible. Control of heated windscreen and heated rear window The GEM is responsible for timer control of the heated windscreen (heating time approx. 10 min.) and of the heated rear window (heating time approx. 20 min.). The voltage-monitoring function of the GEM is maintained. This is responsible for switching off the windscreen heating and, if activated, the fourth stage of the fan motor, if the vehicle electrical system voltage falls below 10.9 V +/- 0.3 V. The heated rear window and the heated door mirrors are switched intermittently (10 sec. ON, 10 sec. OFF). This prevents overloading of the battery. Control of turn signals The turn signal relay and the relay for the hazard warning system are integral components of the GEM. Furthermore, the GEM controls the turn signals when the vehicle is unlocked / locked. This is indicated by a single flash, for single locking of the vehicle and by two flashes, for unlocking of the vehicle. In addition, the turn signals are activated if an alarm is triggered. For installation of a tow bar after the vehicle was sold, the standard trailer telltale in the instrument cluster must be activated in the GEM, using the WDS tester. Control of the main beam The standard main beam relay is an integral component of the GEM. Control of the warning buzzer The buzzer for generating the warning signal is an integral component of the GEM. Control of the interior illumination The GEM is responsible for controlling the interior illumination and the luggage compartment illumination. Both illumination systems are connected in parallel. The interior illumination is switched off approx. 20 seconds after all doors are closed. If the vehicle is unlocked using the remote control, the interior illumination is automatically activated. Control of battery protection function The GEM controls the battery protection function. This function ensures that the various interior illumination functions (door / footwell etc.) are switched off after approx 30 minutes, in order to prevent battery discharge, if the doors are open. Control of central locking / double locking system The central locking / double locking module is an integral component of the GEM. The central locking system can be deactivated using the WDS tester, according to customer preference. Remote control The remote control module is an integral component of the GEM. The radio antenna for reception of the radio signal is also an integral component of the GEM. Through the use of radio remote control, an exact targeting of the antenna with the transmitter is not necessary. The normal range between transmitter and GEM is approx. 5-10 metres. For safety reasons, the global closing function is not available via remote control (due to its considerable range). Coding It is possible that the coding of the transmitter in the key and that of the GEM, no longer match. This can occur, if the transmitter buttons are often actuated outside the effective range of the transmitter. In order to re-synchronise the transmitter and receiver, the following steps must be followed:For additional information, refer to Quote
MrT Posted February 1, 2004 Author Report Posted February 1, 2004 Interesting, I asked because the handbook referred to fuses and was going to look as my front heated windscreen had failed and was listed as having a 50A multifunction fuse on level3. This was not the problem in the end. Where did you get the above quote from, more of this sort of information would be interesting? Quote
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