Interior Lighting: Overview — Ford Fusion I рестайлинг (2005-2012)

Note. The smart junction box (SJB) is also known as the generic electronic module (GEM).

The interior lighting system consists of the following components

SJB
Instrument panel dimmer switch
Interior/map lamps
Luggage compartment lamp
Vanity mirror lamps
Puddle lamps (if equipped)
Door ajar switches
Luggage compartment lid ajar switch
Ambient lighting module (if equipped)
Ambient lighting switch (if equipped)

The interior lighting system consists of up to 3 subsystems

Courtesy lamps
Demand lamps
Ambient lighting (if equipped)

The courtesy lamp subsystem consists of the interior dome lamps, luggage compartment lamp, and the puddle lamps (if equipped). The courtesy lamps illuminate as a system when requested by the SJB during such conditions as an open vehicle door.

The demand lamps subsystem consists of the front map lamps and the left and right vanity mirror lamps. The demand lamps illuminate individually when the vehicle occupant activates them.

Both the courtesy and the demand lamps are controlled by the SJB. The SJB sets DTCs if certain circuit failures exist with the interior lighting system.

The ambient lighting feature allows the vehicle occupant to lightly illuminate the interior of the vehicle in a variety of colors. The ambient lighting system consists of the following

Ambient lighting switch (located in the center console)
Ambient lighting module (located in the center console)
LEDs (hardwired in the ambient lighting electrical harness) Located on the center console cupholder, the storage bin, and the front and rear footwells

The ambient lighting system is powered through the accessory delay relay.

Special Tools Illustration Tool Name Tool Number 73III Automotive Meter 105-R0057 or equivalent Vehicle Communications Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool Flex Probe Kit 105-R025C or equivalent

Scheme 1

Scheme 1: Interior Lighting

Scheme 2

Principles of Operation

Note. The smart junction box (SJB) is also known as the generic electronic module (GEM).

The SJB supplies voltage to the interior lighting system. The interior lighting system illuminates the courtesy lamps to enhance visibility of the interior while a vehicle door is open or ajar, and the vehicle speed is less than 15 km/h (9 mph). The SJB controls all interior lighting functions and timing by monitoring inputs from the door ajar switches and vehicle speed.

The interior lighting delay feature provides temporary illumination of the courtesy lamps after the doors are opened and then closed. The interior lighting delay feature will keep the courtesy lamps on for a period of 25 seconds. If during the 25 second delay time the SJB detects that the ignition has been turned ON, or if the vehicle is locked using the remote keyless entry (RKE) transmitter or the keyless entry keypad, the courtesy lamp illumination will be discontinued.

Normal Operation

Power is supplied to the courtesy lamps through the smart junction box (SJB) fuse 3 (15A), which supplies voltage to the courtesy lamps relay, the demand lamps relay (Fusion, Milan only), and the demand lamps field-effect transistor (FET) (MKZ only). When any door is opened, the ajar switch opens, signaling the SJB to activate the courtesy lamps. The SJB monitors the ajar circuits, and based on the ajar status, the SJB will supply voltage to the courtesy lamps on circuit CLN26 (BU). Ground for the courtesy lamps is supplied through circuit GD139 (BK/YE) or GD126 (BK/WH).

DTC B2499 (Courtesy Lamp Output Failure) - sets when the FET output has been disabled due to an over-current fault on circuit CLN26 (BU). This continuous DTC applies to MKZ only, and it can only be cleared once the fault has been repaired and the on-demand self-test is re-run.