Ford Galaxy / Ford S-MAX. Manual — part 865

Fuel pump module (FPDM)

Heated windscreen

Heated rear window, heated exterior mirrors

Window washer pump

Headlamp washer pump

Electric booster heater

Instrument cluster

Remote control receiver module

Yaw rate sensor

Parking brake (electriic/mechanical)

Clutch travel sensor

Ignition lock

Stoplamp switch

Fuel level sensor

Accelerator pedal position (APP) sensor

Backup lamp switch

Multifunction switch

PATS transceiver

Speed control switch

Windscreen heater switch

Rear window heater switch

Evaporator temperature sensor

Hazard flasher switch

Brake fluid level switch

Light switch module

Light/rain sensor

Generic electronics module (GEM)

The generic electronic module is installed on the passenger's side underneath the dash
panel.

It replaces separate components such as the central locking module, the timer relay and the
fuse box in the passenger compartment.

It consists of a power distribution section (including fuses and relays) and an electronic
control module, which controls the operation of most of the electronic convenience systems.

New vehicles are supplied with different versions of the GEM (depending on the equipment
specification of the vehicle). Only one version is available for service repair work. When

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installing a replacement GEM it needs to be configured for the specific vehicle.

The following functions are controlled or executed by the GEM if the battery voltage is
between 9 and 16 V.

Battery saving function
Current distribution
Exterior lighting (except the adaptive front lighting function on vehicles with dynamic
cornering lights)
Interior lighting
Wiper system
Washer fluid level indicator
Window heating (heated windshield, heated rear window, heated exterior mirrors)
Speed control system (reads the speed control switches and transmits signals on the CAN
bus)
Locking / Unlocking
Anti-theft
Air conditioning controls (partial)
Handbrake (it monitors the switch and transmits the signal on the CAN bus)
Monitoring of the brake fluid level.
Fuel pump (vehicles with 2.0L engine)
Fuel level indicator
Battery charging (smart charge, partially)
Electric booster heater
Detection of the accelerator pedal position (APP) sensor
Detection of the clutch pedal switch
Detection of the clutch pedal position (CPP sensor)
Brake pedal position (BPP) switch.
Tire Pressure Monitoring System
Communications via the mid-speed CAN bus
Main module in the LIN bus system
PATS (interface for transceiver)
Clock control

The GEM can be diagnosed via the WDS. Furthermore, an integrated service mode enables
testing of the input and output signals without the need for further tools.
For additional information, refer to:

Generic Electronic Module (GEM)

(419-10 Multifunction

Electronic Modules, Diagnosis and Testing).

Emergency function

The GEM is equipped with restricted emergency running functions on vehicles with medium
or high levels of equipment.

A monitoring function within the GEM is sent a control signal at regular intervals by the
microcontroller. If for example the battery voltage drops below a voltage of approx. 7.5
Volt then the control signal is not sent and the GEM goes into emergency running mode
after a specified time.

In this case the dipped beam headlamps and the side lights are switched on permanently
depending on the position of the light switch.

In the event of a communication fault between the wiper switch and the GEM the wiper
system performs continuous wiping at normal wipe speed regardless of the wiper switch
position. The emergency running mode is switched off when the ignition switch is turned to
"0".

In the event of a communication fault between the GEM and the wiper motors the wiper
system runs through the following emergency running sequence regardless of the wiper
switch position:

Continuous wipe at speed setting 2 for 5 minutes

Continuous wipe at speed setting 1 for 5 minutes
Intermittent operation for 5 minutes

At the end of this 15-minute sequence the emergency running mode automatically switches
off. It cannot be started up again until the fault has been rectified. Emergency running
mode cannot be interrupted by switching off the ignition.

When the control signal is present again the GEM resumes normal functions.

Light switch

The light switch has been modified and now includes electronic controls. It is connected to
the GEM via the control module subnetwork (LIN) bus.

If the ignition lock is in position "0" for more than 30 minutes then the front fog lamps, rear
fog lamp and the main beam headlamps are deactivated if they were previously activated.

Combined rain sensor/light sensor

Description

Lens

Front light sensor

Ambient light sensor

The combined rain sensor/light sensor is attached to the windshield, near the interior rear
view mirror.

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.

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 GEM depending on the input signals of the combined rain
sensor/light sensor.

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

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instrument cluster is transmitted to the GEM.

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 calculation will not
result in the lights being switched on.

If the vehicle returns to brighter surroundings then the GEM gradually switches off the
dipped beam headlamps, side lights, license plate lamps and the instrument cluster and
dashboard lighting. Following a request from the light sensor, the GEM first switches off the
dipped beam headlamps. After waiting approx. 6 seconds, it then switches off the side
lights, the license plate lamps and the instrument cluster and dashboard lighting.

Headlamp switch-off delay

In vehicles with mid to high-end equipment, the headlamp switch-off delay uses the low
beams and the peripheral lights (if equipped) for illuminating the vehicle surroundings. The
function is activated by operating the high beam lever when the ignition switch is in the "0"
position.

After the last door has been closed, the function remains active for a further 30 seconds
and then switches off automatically.

When a door or the tailgate is open, the switch-off time is extended to 180 seconds. After
the last door has been closed, the switch-off time is reset to 30 seconds.

The headlamp switch-off delay can be deactivated prematurely by operating the high beam
lever again or by switching on the ignition.

The switch-off time is adjusted to set values at the factory and cannot be re-programmed
using WDS.

Interior lighting

Depending on the vehicle specification, the interior lighting which is controlled by the
GEM may include:

Left and right-hand footwell lamps
Front and rear dome lamps (in "door contact" switch position)

Depending upon vehicle specification, the interior lamps which can be switched by the
operator include:

Front and rear dome lamps (in "On" switch position)
Map lights
Mirror lights in sun visors
Glove compartment lamp
Luggage compartment lamp

The GEM-controlled interior lighting is switched on with dimmed brightness if one of
the following conditions is satisfied:

One of the vehicle's doors is opened.
The ignition key is in the "0" or "I" position and the vehicle is unlocked.
The ignition key is turned from the "II" to the "I" or "0" position.

The GEM-controlled interior lighting is switched off if all of the doors are closed and
one of the following conditions is satisfied:

25 seconds have elapsed since the last door was closed.
The ignition key is turned from the "0" or "I" to the "II" position.
The ignition key is in the "0" or "I" position while the vehicle is locked.

The duration of the dimmer function is 1.7 seconds in both the switch-on and switch-off