Explorer 2WD V6-245 4.0L SOHC VIN E EFI (1997)
Multifunction Electronic Control Module: Description and Operation
With Power Windows
GEM Controlled Functions
The Generic Electronic Module (GEM) is equipped on four wheel drive vehicles with power windows. The Central Timing Module (CTM) is equipped
only on the two wheel drive vehicles without power windows.
NOTE: GEM diagnostics are compatible with the New Generation STAR (NGS) Tester while CTM diagnostics are not.
The GEM incorporates the functions of several different modules into one and offers diagnostics to easily locate and repair concerns affecting the
subsystems that it controls.
The GEM constantly monitors the systems under its control and reports a concern in the form of Diagnostic Trouble Code (DTC). A DTC can be
retrieved with the NGS or equivalent through the communication link.
The NGS is a menu-driven tester, allowing the user to run specific diagnostic tests. It can isolate faults in the GEM subsystems through a
symptom-driven diagnostic procedure. Connecting the tester to the GEM communication link will not alert the GEM. If the GEM is in sleep mode when
the diagnostic connector is plugged in, the GEM must be activated. If the communication link cannot be established, it will advise to turn the ignition to
RUN.
NOTE: The GEM has a sleep function to minimize battery consumption. During the sleep mode, the GEM turns OFF all outputs and monitors only the
following:
^
Door ajar (driver door, passenger door, lift gate, left rear, and right rear doors).
^
Key in ignition.
^
Key in RUN or ACCY.
^
Door handles (driver or passenger).
^
Two-step unlock switch (disarm switch).
^
Neutral safety switch.
^
Illuminated entry request (RAP module).
