Explorer 2WD V6-245 4.0L SOHC VIN E EFI (1997)
coil through C283-12, and is deactivated by removing the ground.
Panel Dimmer Switch
The panel dimmer switch controls the interior lamps by supplying power to the interior lights. The battery saver relay supplies power to the panel
dimmer switch. When the battery saver function is active, power will not be supplied to the dimmer switch circuit and the panel dimmer switch
will not turn on the interior lighting.
Remote Anti-Theft Personality Module
The RAP module sends a signal to the GEM on the illuminated entry request circuit to indicate a request to turn the illuminated entry feature ON
or OFF. Circuit 101 3(BR/LG) is normally sent to 12 volts by the GEM. The RAP module shorts this circuit to ground with a pulse of either of the
lengths:
^
200 ms pulse from RAP receiver assembly request illuminated entry ON.
^
300ms pulse from RAP receiver assembly request illuminated entry OFF.
Illuminated Entry
The illuminated entry feature is another feature which activates the interior lamps. This feature works as follows:
The GEM illuminates the interior lamps when either front door handle is lifted or an unlock signal is received from the RAP module. The
illuminated entry feature will be canceled when any of the these conditions are met:
^
25 seconds have elapsed since the illuminated entry feature was activated and the interior lamp control is not activated.
^
The GEM receives a request from the RAP module (remote transmitter lock button pressed) and the courtesy lamp control is not activated.
^
The ignition is in the RUN or START position and the interior lamp control is not activated.
The illuminated entry inputs are:
^
Door Open warning switch (grounded when the handle is lifted; an open circuit when the handle is released).
^
Ignition switch in the key-in, ACC and RUN position.
^
RAP illuminated entry request.
The GEM sleep mode outputs are:
^
NONE. (All circuits are deactivated during sleep mode).
If a change in any of the inputs occurs while the GEM is asleep, the GEM will wake up and monitor all of its inputs and have the ability to activate
any of its outputs.GENERIC ELECTRONIC MODULE CONTROLLED FUNCTIONS
The Generic Electronic Module (GEM) is equipped on these vehicles with power windows. The Central Timing Modules (CTMs) are equipped
only on the two-wheel drive vehicles without power windows.
NOTE: GEM diagnostics are compatible with the New Generation STAR (NGS) Tester. 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 Tester through the communication link.
The NGS is a menu-driven tester, allowing the user to run specific tests. The NGS 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 "asleep" when
the diagnostic connector is plugged in, the GEM must be "awakened". If the communication link cannot be established, it is advised 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 ACC.
^
Door handles (driver or passenger).
^
Two-step unlock switch (unarm switch).
^
Neutral safety switch.
^
Illuminated entry request (remote anti-theft personality [RAP] module).
If a change of status occurs at one of these inputs while the GEM is asleep, the GEM will "wake up." When the GEM awakens, it performs an
internal self-test, and begins normal operation. At this point, the GEM will have all of its functions operational.
The GEM will go into the sleep mode immediately after both of the conditions have been met:
^
Key in OFF or key not in ignition.
^
After 45 minutes with no change in any wake-up input.
