A diagnosis of the generic electronic module (GEM) can be performed with the Ford approved diagnostic tool. 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:
Activating the service mode
Proceed as follows to activate the service mode:
A signal sounds and the turn signal lamps come on to indicate that service mode has been successfully activated.
NOTE: If the alarm is activated (in vehicles fitted with an anti-theft alarm system), service mode cannot be activated.
Inputs
SWITCH the windshield wiper switch to the "Off" position to test the input signals. The following is a list of the switch signals to be tested, in no particular order:
Turn signals (right, left, hazard warning lights)
An acoustic signal sounds and the turn signal lamps flash to indicate receipt of each input signal by the generic electronic module.
Test the windshield wiper "intermittent mode" stage input signal (only vehicles with adjustable intermittent mode)
The windshield wiper switch must be switched to "intermittent mode" in order to test the input signal.
The delay times of the input signals can then be tested by operating the rotary switch. Each change of the rotary switch position is indicated by an acoustic signal and illumination of the turn signals.
Output signals
SWITCH the wiper switch to the "intermittent"" position to test the output signals. PRESSING the heated rear window switch activates the output signals in the following order:
a. Turn Indicator Left Hand
b. Turn Indicator Right Hand
c. main beam
d. dipped beam
e. Windshield wiper stage I
f. Windshield wiper stage II
g. Heated rear window
h. Heater blower motor
i. Headlamp washer system (vehicles with gas discharge headlamps)
j. Electric booster heater (if fitted)
k. Autolamps (if fitted)
l. Alarm horn (vehicles with alarm system)
m. Rear window wiper
n. Rear heated window relay
When the heated rear window switch is pressed again, the test of the relevant signal is terminated.
When the heated rear window switch is pressed once more, the test for the next signal in the list is started.
Ending the service mode
The GEM automatically ends service mode 20 seconds after the last input or at a driving speed of over 7 km/h. However, service mode can be manually ended at any time by proceeding as follows:
3 signals sound and the turn signal lamps illuminate to indicate that service mode has ended.
Reset service mode
If, after completion of service mode, some functions do not operate or do not operate properly, check the following functions:
Instrument cluster illumination, side lamps and license plate lamp in autolamps mode
If one or more of the listed functions is not OK, it's possible that the cause of the fault is due to not exiting service mode properly. To reactivate the functions correctly, perform the following steps:
1. SWITCH OFF the ignition
2. SWITCH OFF the switch for the windscreen wash/wipe system
3. OPERATE the switch of the heated rear window and HOLD IT THERE
4. Turn on the ignition.
5. RELEASE the heated rear window switch (an acoustic signal will sound if activation has been performed correctly)
6. SWITCH the windscreen wash/wipe switch to the "Intermittent wipe" position
7. OPERATE the heated rear window switch 6 times (the main beam headlamps switch on and off automatically)
8. SWITCH OFF the switch for the windscreen wash/wipe system
9. OPERATE the switch of the heated rear window and HOLD IT THERE
10. SWITCH OFF the ignition
11. RELEASE the heated rear window switch (three acoustic signals will sound if activation has been performed correctly)
After completion of the work, check all the functions.