Ford Fiesta (2011 year). Manual — part 182

Generic Electronic Module (GEM)

General Equipment

Ford diagnostic equipment

Principles of Operation

A diagnosis of the generic electronic module (GEM)
can be performed with the Ford diagnostic
equipment. Furthermore, an integrated service
mode enables testing of the input and output
signals without the need for further tools. To enable
activation of service mode:

• Switch off the ignition,

• Switch off all other electrical consumers,

• Apply the handbrake,

• Shift to neutral

• Close the doors.

Activating the service mode

Proceed as follows to activate the service mode:

• OPERATE the switch of the heated rear window

and HOLD IT THERE

• Turn on the ignition.

• RELEASE the switch of the heated rear window

• PRESS the heated rear window switch 8 times

within 6 seconds

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

Input signals

SWITCH the wiper switch to the "Off" position to
test the input signals. The following is a list of the
signals to be tested, in no particular order:

• Turn signals (right, left, hazard warning lights)

• "Lights on" warning (terminal 58)

• Windshield wiper (intermittent wipe)

• Windshield washer system

• Rear window wiper

• Rear window washer system

• Doors/tailgate open/closed

• Central locking

• Hood open/closed (in vehicles equipped with

an anti-theft alarm system)

• Front fog switch (if fitted)

• Rear fog switch

• Heated rear window

• Heated windscreen (if fitted)

An acoustic signal sounds and the turn signal
lamps flash to indicate receipt of each input signal
by the generic electronic module.

Output signals

SWITCH the wiper switch to the "Intermittent"
position to test the output signals. PRESS the
heated rear window switch activates or deactivates
the output signals in the following order:

a. Windshield wipers (a signal sounds and the

direction indicator lamps flash when the "Park"
position is reached)

b. Heated rear window

c. Interior light(s) (the interior light switch must be

in the "ON" position)

d. Rear window wiper

e. heated windshield (if fitted, is only activated

when engine is running)

If the heated rear window switch is operated again,
the sequence restarts with point 'a' and the
functions are activated again in this order.

Ending the service mode

The GEM automatically ends service mode 20
seconds after the last input. However, service
mode can be manually ended at any time by
proceeding as follows:

• OPERATE the switch of the heated rear window

and HOLD IT THERE

• SWITCH OFF the ignition

• RELEASE the switch of the heated rear window

3 signals sound and the turn signal lamps illuminate
to indicate that service mode has ended.

Inspection and Verification

1. VERIFY customer concern.

2. Visually CHECK for any obvious mechanical or

electrical damage.

NOTE: Make sure that the wiring harness electrical
connector is correctly and securely connected.

Visual Inspection

Electrical

Fuses

G509494en

Multifunction Electronic Modules

DIAGNOSIS AND TESTING

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