Explorer 2WD V6-245 4.0L SOHC VIN E EFI (1997)
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Door ajar (driver door, passenger door, lift gate, left rear, and right rear doors).
Key-in-ignition.
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Key in RUN or ACC.
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Door handles (driver or passenger).
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Two-step unlock switch (unarm switch).
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Neutral safety switch.
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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 following conditions have been met:
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Key in OFF or key not in ignition.
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After 45 minutes with no change in any wake-up input.
The GEM control system has two modes of operation, the normal operating mode and the tester-dependent diagnostics mode.
The normal operation of the GEM can detect errors. An integral part of the normal GEM operation is the continuous diagnostic capability.
Continuous diagnostics detects errors and changes the GEM control strategy. There is no warning light for the GEM; therefore, a DTC concern
will direct you to the GEM. Examples of faults that may be detected during normal operation include:
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GEM continuous self-test (RAM, ROM, EEPROM, A/D checking).
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Output driver monitoring (open circuit/short to ground [GRD], short to power).
NOTE: The GEM can only detect open circuit/short to GRD faults when the GEM in not energizing a load, and short to battery faults when
the GEM is attempting to energize a load.
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Illogical combinations of input signals.
Battery Saver
NOTE: The exterior lamps are not part of the battery saver protection, and will remain on even if the GEM turns the interior lamps off.
The GEM will keep power available for all interior lights including: dome lamp, map lamp, glove box lamp, ash tray lamp, key ring lights and
cargo lamp circuits for 45 minutes after the ignition switch is turned off. The battery saver time is reset by lifting a door handle (receiving an
illuminated entry request), activating a door ajar switch, changing the ignition to START, or moving the key to the RUN or ACC position.
The battery saver feature removes extended interior lamp power drains to the battery. The GEM keep power to these loads for 45 minutes after the
ignition switch is moved to OFF. After the ignition switch is moved to OFF and 45 minutes have elapsed with no change of state on any wake-up
inputs, the GEM will enter a "sleep mode." During the sleep mode, the GEM maintains all of its outputs in a deactivated state until a
wake-up-command is received.
A wake-up-command is sent when:
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Any door becomes ajar or is opened or closed.
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The front door handle is lifted (if equipped with illuminated entry).
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The key is inserted or removed.
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The ignition switch is turned from OFF to RUN.
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The ignition switch is turned from OFF to ACC.
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A wake up request is received from the RAP module.
Courtesy Lamps
The GEM illuminates the interior courtesy lamps when any door is set ajar or is opened. These are the inputs used for controlling the courtesy
lamps:
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All door ajar switches (including liftgate).
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Door handle switches.
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Illuminated entry request with RAP module.
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Two-step unlock door disarm switches.
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Vehicle speed sensor input.
All interior courtesy lamps are turned off when any of the following occurs:
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All the doors are closed and the illuminated entry feature is not active.
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The ignition switch is turned to RUN.
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Vehicle speed is over 8 km/h (5 mph).
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A power door lock command is received before the five seconds have elapsed for two-step unlock.
Interior Lamp Relay
The GEM controls the interior lamps illuminated entry function with the interior lamp relay. The relay is activated by applying ground to the relay
