Ford Workshop Service and Repair Manuals

Generic Electronic Module (GEM)

The GEM is an independent control module which controls a series of functions of the body electrics.

It replaces the Central Timer Module (CTM) and the central locking module.

Three different variants are available for vehicles with remote locking:

• A - vehicles with remote locking without heated windshield
• B - vehicles with remote locking with heated windshield
• C - vehicles with remote locking, anti-theft warning system and with or without heated windshield

Overview of operation

Turn signal lamps

The turn signal lamps are used for the following signals:

• Confirmation of locking and alarm activation (central locking/anti-theft alarm system)
• Alarm triggered (anti-theft alarm system)
• Confirmation of reprogramming (remote control)

As these signals could overlap in certain situations, a priority level has been assigned to each one:

• Priority 1: alarm triggered
• Priority 2: confirmation of locking/activation of alarm
• Priority 3: confirmation of reprogramming

Interior lighting

The interior lighting controlled by the GEM includes the overhead light at the front and rear and the luggage compartment light.

The overhead lights are only switched by the GEM if the corresponding light has been set to "Door operation" (not if the light is in the "Continuous" or "Off" settings).

The lights are switched on as soon as one of the following conditions is satisfied:

• A door or the liftgate/tailgate has been opened (switch in the door/liftgate/tailgate lock).
• The ignition lock is in position "0" or "I" and the vehicle is unlocked centrally.
• The ignition lock is turned from position "II" to position "I" or "0".

The lights are switched off when all of the doors and the liftgate/tailgate are closed and one of the following conditions is satisfied:

• 25 seconds after the lights are switched on.
• The ignition lock is turned from position "0" or "I" to position "II".
• Ignition lock in position "0" or "I" while the vehicle is being locked.

The interior lighting are dimmed on and off by the GEM.

When the lights are switched on, their operating voltage is brought from 0V to operating voltage within a period of 0.7 seconds.

When the lights are switched off, the operating voltage is continuously reduced to 0V within a period of 1.7 seconds.

The dimmer function is not utilised if the lights are switched off by the battery protection function.

Heated windshield

The heated windshield can only be switched on if the engine is running.

The GEM switches on the relay for the heated windshield in response to a request from the switch in the dash panel.

The LED in the corresponding switch lights up all the time the windshield is being heated.

The GEM switches the relay off if

• four minutes have passed since switching on.
• the switch in the dash panel is pressed again.
• the engine is switched off.

Rear window heating

The rear window heating can only be switched on with the ignition key in position "II".

The GEM relay is switched on for the rear window heating in response to a request from the switch in the dash panel (only vehicles without convertible top).

The LED in the switch lights up all the time the rear window is being heated.

NOTE:If the vehicle is equipped with heated exterior mirrors, then these are operated together with the rear window heating.

The relay switches off if

• the switch in the dash panel is pressed again.
• the ignition key is turned to position "I" or "0".

Windshield intermittent wipe functions

NOTE:All of the wash/wipe functions are only available if the ignition key is in position "II".

In the intermittent setting a wipe is performed every 7 seconds when the basic setting is selected.

The intermittent wipe delay time can be adjusted. To do this, the wiper switch is set to the intermittent wipe position and then switched back off after the first wipe. After the desired wipe interval has elapsed the switch is again moved to the intermittent wipe position. The intermittent wipe delay time is then stored in the GEM.

The time delay can be adjusted to between 1 and 25 seconds.

When the ignition is switched off the time delay is reset to the basic setting of 7 seconds.

Windshield wash/wipe function

If the washer switch is activated with the wiper switch in the "Off" position, then the washer pump is switched on first to protect the wiper blades, and then after a short delay the wipers. The wipers then perform 2 or 3 wipes.

The post wipe function on the windshield ensures that any water remaining on the windshield after washing is wiped away. It is only required if the wipers are switched off or set to intermittent mode.

If the wiper switch is in the "Off" position then a post wipe operation is performed 4 seconds after the washing process is finished.

When the wipers are in intermittent mode the post wipe is performed after 6 seconds, or according to the wiper delay time if set to more than 6 seconds. Afterwards the wipers continue in intermittent mode.

If the wipers are in operation at normal or high speed when the washer is activated then they continue to run at this speed.

Rear window wipe function (only vehicles without convertible top)

The rear window wiper changes the wiper delay interval according to the setting of the windshield wiper switch.

If the windshield wiper switch is set to Level 2 and the rear window wiper is switched on, then the wiper delay interval is 6 seconds.

If the windshield wiper switch is in the "Off" position, Intermittent or Level 1 setting and the rear window wiper is switched on, then the wiper delay interval is 10 seconds.

If reverse gear is engaged while the windshield wiper is switched on and the rear window wiper is switched off, then the GEM automatically switches on the rear wiper with the wiper delay interval as described above. This function remains activated until reverse gear is no longer engaged or the windshield wiper is switched off.

Rear window wash/wipe function (only vehicles without convertible top)

When the switch for the rear window washer is activated washer fluid is sprayed onto the rear window and the wiper performs wipe operations (while the switch is being activated).

When the switch is released the wiper performs 2-3 more wipes.

Information/warning functions

An audible signal is generated by the GEM if

• the system changes over to the learning mode for the remote control (once).
• conformation of entry into the service mode is shown by a single flash of the turn indicators. Each subsequent input test will be shown by a short GEM chime and one flash of the turn indicators. Conformation of exit from service mode is shown by two flashes of the turn indicators.
• the ignition lock is in position "I" or "0" and the light switch is in position "1" or "2" and the driver's door is opened (continuous "Lights on" warning sound).
• the convertible top stowage compartment lid lock is engaged and the compartment lid or the tailgate has been opened (only vehicles with convertible top).

Locking/unlocking - central unlocking

The vehicle is centrally unlocked if

• the unlocking button on the remote control is pressed.
• the internal door openers are pulled to the unlocking position.

Locking/unlocking - automatic central locking

The vehicle is centrally locked again automatically after unlocking with the remote control if within 45 seconds neither a door or the liftgate/tailgate are opened or the remote control is operated.

Learning of remote control transmitters

NOTE:Up to a maximum of four remote control transmitters can be learned per vehicle.

During the learning process the memory for the known remote control transmitters in the GEM is deleted and the existing and new transmitters are relearned.

To enter the learning mode for remote control transmitters, turn the ignition lock four times in the space of 6 seconds from the position "0" to the position "II".

The learning mode is confirmed with an acoustic signal. Afterwards the corresponding remote control transmitters can be learned within 10 seconds.

To start the learning process, press one of the buttons on the remote control.

The GEM confirms each learning process with a signal tone.

Anti-theft alarm system

The anti-theft alarm system provides a visual and acoustic signal that an unauthorised person is attempting to gain access to the vehicle or that an attempt is being made to turn the ignition key while the anti-theft alarm system is activated.

The system monitors:

• Hood
• Doors
• Liftgate/tailgate
• Ignition lock
• Microwave sensor (only vehicles with anti-theft alarm system with alarm horn with integral battery)

In the event of an alarm, the system actuates a separate signal horn (audible alarm) for 30 seconds and the hazard warning lights (visual alarm) for 5 minutes (only vehicles with anti-theft alarm system with alarm horn with integral battery with C-variant).

The anti-theft alarm system is activated with a delay of 20 seconds by centrally locking the vehicle. To do this the ignition lock must be in the position "0".

After the time delay of 20 seconds the hood, all doors and the liftgate/tailgate are alarmed, provided they are fully closed.

If the hood, one of the doors or the liftgate/tailgate are not fully closed then they can be opened without triggering an alarm. If they are then closed, the same time delay of 20 seconds applies before they are alarmed.

The anti-theft alarm system can be switched off with the remote control or by inserting the ignition key into the ignition lock (C-variant).

If the liftgate/tailgate is opened with the remote control then only the anti-theft alarm for the liftgate/tailgate is deactivated.

If the liftgate/tailgate is then closed again the anti-theft alarm is reactivated for the liftgate/tailgate after 20 seconds.

The current status of the anti-theft alarm system is stored if the power supply to the GEM is interrupted. This means that as soon as the power supply to the GEM is restored it reverts to the stored status (if for example the vehicle was alarmed beforehand, it is then re-alarmed).

Liftgate/tailgate release

The liftgate/tailgate can be unlocked manually

• with the key.
• with the remote release button in the passenger compartment.
• with the remote control.

The remote release button will not unlock the liftgate/tailgate if the vehicle is centrally locked or if the vehicle is travelling in excess of 7 km/h.

The remote control can be used to unlock the liftgate/tailgate by pressing the corresponding button twice within 3 seconds.

Battery protection function

The battery protection function prevents the battery from discharging as a result of the interior lighting or the warning sound generator when the engine is switched off.

As soon as the ignition lock is turned to position "I" or "0", a time counter is started in the GEM.

If a door is open the interior lights are switched off after 10 minutes.

If the doors are closed the interior lights, reading lights, luggage compartment lights and the warning sound generator are switched off after 30 minutes.

The battery protection function and the time counter are stopped after the following actions and then if necessary restarted:

• Ignition lock in position "II".
• Opening of a door or the liftgate/tailgate.
• Unlocking of a door or the liftgate/tailgate (with remote control).

The battery protection function is also in operation if the GEM is in service mode or diagnostic mode.

GEM - Diagnosis and Configuration

Diagnosis

The GEM can be diagnosed with the aid of WDS.

There is also an additional service mode.

This service mode allows testing of various input signals.

The service mode is activated by pressing the driver door ajar switch five times within eight seconds. The ignition lock must be in the "0" position and the anti-theft alarm system must be switched off.

A signal sounds and the turn signal lamps flash to indicate that service mode has been successfully activated.

NOTE:If the alarm has been triggered (in vehicles equipped with an anti-theft alarm system), service mode cannot be activated.

The wiper switch must be in the "Off" position for testing of the input signals.

The relevant input signals are indicated with an acoustic signal and by the flashing of the turn signal lamps.

The following signals can be tested in any order:

• "Lights on" warning signal
• Windshield wipe function park mode
• Windshield wash function park mode
• Liftgate/tailgate release switch
• Doors/liftgate/tailgate ajar switches
• Hood ajar switch (only on vehicles with an anti-theft alarm system)
• Ignition "On"
• Convertible top stowage compartment lid release switch (only vehicles with convertible top)

The GEM automatically exits the service mode 20 seconds after the last input.

Two flashes of the turn signal lamps confirm that the service mode has been exited.

Configuration

In order to minimize module variations, different equipment levels and functionalities are incorporated in the same module. For this reason, modules must be programmed following replacement. For this purpose, the vehicle-specific data is read out of the module to be replaced using WDS and is transferred to the new module.

If, before replacing a module, it was not possible to read out the vehicle-specific data using WDS (the module to be replaced does not respond) then, during programming of the new module, the vehicle-specific data must be entered manually via a selection list in WDS.

Following configuration of the GEM, module-resetting of the GEM using WDS must be performed. For this purpose, select the "Programmable parameters" submenu in the "Module programming" menu tool box and then follow the instructions under the "GEM reset" menu item.