Lincoln Navigator: Interior Lighting / Interior Lighting - System Operation and Component Description. Description and Operation

System Operation

Overview

The interior lighting system consists of:

• Courtesy lamps
• Demand lamps
• Ambient lighting

The courtesy lamps subsystem consists of:

• Interior lamps
• Puddle lamps
• Door ajar switches (integrated into the door latches)
• Courtesy lamp switch (integrated into the front interior lamp)
• Cargo lamp
• Cargo space lamp
• Exterior door release handles
• Scuff plate lamps
• Running Board LED s
• RGTM
• DDM
• PDM
• BCM
• RBM

The courtesy lamps provide illumination to the vehicle interior, below the exterior mirrors and on the power running boards when entering or exiting the vehicle or when requested using the courtesy lamp switch located on the front interior lamp assembly.

The demand lamps subsystem consists of:

• Interior lamps (map lamps)
• Vanity mirror lamps
• Glove compartment lamp
• BCM

The demand lamps provide illumination to specific areas within the vehicle when needed.

The BCM energizes the demand lamp relay to supply voltage to the demand lamps when the battery saver feature is not active.

The ambient lighting subsystem consists of:

• Ambient lighting Light Emitting Diodes (LEDs)
• FDIM (touchscreen)
• BCM

The ambient lighting provides illumination to the following locations for illuminated entry or when the ignition is in RUN with the parking lamps on:

• Interior door release handles
• Front footwells
• Rear footwells (under front seats)
• Passenger side instrument panel
• Seatbelt buckles
• Seatbelt inflators
• Floor console
• Second row cup holder
• Second row console

System Diagram

*.sttxt { visibility: hidden; } *.stcallout { visibility: visible; } E365099 1 BCM 2 Headlamp Switch 3 APIM 4 GWM 5 Door Ajar Switches 6 Interior Door Handle Ambient Lighting LEDs 7 LH Puddle Lamp 8 RH Puddle Lamp 9 DDM 10 PDM 11 FDIM 12 RGTM 13 Demand Lamps 14 Footwell Lamps 15 Running Board LEDs 16 RBM 17 Overhead Console 18 Cargo Lamps 19 Scuff Plate Lamps 20 Seatbelt Buckle Lighting LEDs 21 Seatbelt Inflator Lighting LEDs 22 Front Console Ambient Lighting LEDs 23 Passenger Side Instrument Panel Ambient Lighting LEDs 24 Second Row Cup Holder Ambient Lighting LEDs 25 Exterior Door Handle Lamps 26 Second Row Console Ambient Lighting LEDs 27 Rear Dome Lamp 28 without vista roof 29 Rear Interior Lamps 30 with vista roof 31 Rear footwells Lamps

Item	Description
1	BCM
2	Headlamp Switch
3	APIM
4	GWM
5	Door Ajar Switches
6	Interior Door Handle Ambient Lighting LEDs
7	LH Puddle Lamp
8	RH Puddle Lamp
9	DDM
10	PDM
11	FDIM
12	RGTM
13	Demand Lamps
14	Footwell Lamps
15	Running Board LEDs
16	RBM
17	Overhead Console
18	Cargo Lamps
19	Scuff Plate Lamps
20	Seatbelt Buckle Lighting LEDs
21	Seatbelt Inflator Lighting LEDs
22	Front Console Ambient Lighting LEDs
23	Passenger Side Instrument Panel Ambient Lighting LEDs
24	Second Row Cup Holder Ambient Lighting LEDs
25	Exterior Door Handle Lamps
26	Second Row Console Ambient Lighting LEDs
27	Rear Dome Lamp
28	without vista roof
29	Rear Interior Lamps
30	with vista roof
31	Rear footwells Lamps

Network Message Chart

  DDM And PDM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Puddle lamp activation	GWM	Provides puddle lamp request from the GWM to activate the exterior mirror welcome mat lamps.

  RBM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Running board lamp activation	GWM	Provides running board lamp request from the GWM to activate the running board lamps.

  GWM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Ambient light color/intensity request	APIM	Indicates the color and brightness setting selected from the display interface. This commands the ambient color and brightness setting as requested by the operator.
Puddle lamp activation	BCM	Provides welcome mat lamp request from the BCM to activate the exterior mirror welcome mat lamps.
Running board lamp activation	BCM	Provides running board lamp request from the BCM to activate the running board lamps.

  BCM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Ambient light color/intensity request	GWM	Indicates the color and brightness setting selected from the display interface. This commands the ambient color and brightness setting as requested by the operator.

Battery Saver

NOTE: Time-out is 10 seconds if the vehicle is in factory mode or 1 minute if the vehicle is in transport mode.

The BCM provides automatic shut-off of the courtesy and demand lamps after a time-out period when the ignition is OFF. A timer in the BCM starts when:

• the ignition transitions to OFF.
• the front or rear interior lamp was switched ON.
• any door becomes ajar.
• any button of a RKE transmitter is pressed.
• a door is unlocked using the passive entry feature.
• a valid code was entered on the keyless entry keypad.

When 10 minutes (30 minutes for demand lamps) have elapsed, the BCM automatically shuts off voltage to the lamps. The timer restarts (voltage is restored if the BCM is in battery saver mode) when:

• the ignition transitions out of OFF.
• the front or rear interior lamp was switched ON.
• any door becomes ajar.
• any button of a RKE transmitter is pressed.
• a door is unlocked using the passive entry feature.
• a valid code was entered on the keyless entry keypad.

Courtesy Lamps

The BCM controls the courtesy lighting functions and timing by monitoring inputs from the following:

• Ignition state
• Courtesy lamp switch (integrated into the front interior lamp assembly)
• Door ajar switches
• RGTM
• RKE system

The BCM sends a voltage signal to each door ajar switch. When the doors are closed, the circuit is switched to ground and the voltage is pulled low, indicating closed doors.

The BCM monitors the ignition state and inputs from the RKE system to determine when to energize the interior light relay. When the interior light relay is energized, voltage is provided to the interior lamps. The BCM controls the voltage side of the courtesy lamps for the illuminated entry and exit features.

For keyless entry, the BCM monitors input from the RFA module to determine when to activate/deactivate the illuminated entry and exit functions.

When the welcome mat lamps (puddle lamps) are requested, the BCM sends a message over the HS-CAN1 to the GWM then the GWM sends the message to the DDM and the PDM over the MS-CAN .

The DDM and the PDM provide voltage to the left and right welcome mat lamps based on messaged input from the BCM .

The RBM provides voltage to the left and right power running board lamps based on messaged input from the BCM .

The interior courtesy lamps can also be activated from the global ON/OFF switch(es) integrated into the overhead console. The overhead console controls the courtesy lamp function of the rear interior lamps. When the global ON/OFF switch is pressed on the front interior lamp, the courtesy lamp function for all the lamps is turned on/off. If any door is open, the BCM command overrides the function of the global ON/OFF switch and activates the courtesy lamps.

There are three control switches on the overhead console:

• Global On
• Global Off
• Door Defeat

The global on and off buttons activate or de-activate the courtesy lamps while the doors are closed.

The door defeat button deactivates the courtesy lamps so when the doors are opened the courtesy lamps remain off. When the door defeat function is activated, the door defeat button illuminates amber in color and when de-activated, the button illuminates blue and the courtesy lamps return to normal operation.

If any door is open and the door defeat function is activated, the global on and off buttons continue to function and activate or de-activate the courtesy lamps.

Illuminated Entry and Exit

The illuminated entry and exit features provide temporary illumination of the parking lamps, the dimmable backlighting, the ambient backlighting and the courtesy lamps. Refer to the table for additional information.

NOTE: An arbitrator (software programming) within the BCM determines which actions take precedence over others (for example, an open door keeps the courtesy lamps on even when a command to lock the doors is received).

Action	Parking Lamps	Courtesy Lamps	Dimmable Backlighting	Ambient Lighting
RKE transmitter or mechanical unlocking of the doors	On for 25 seconds	On for 25 seconds	On for 25 seconds	Off
RKE transmitter or mechanical locking of the doors	Off	Off	Off	Off 3 seconds after courtesy lamps turned off
Open a closed door after previously unlocking (no ignition state change since unlock)	Off (on for remaining time if unlocked from transmitter or mechanical unlocking of the doors)	On	Off	On
Close all doors	Off	On for 25 seconds	On for 25 seconds	On for 25 seconds
Ignition changed to ON	Off	On for 25 seconds	Off	On
Ignition changed out of ON	Off	On for 25 seconds	On for 25 seconds	On for 25 seconds
Open a door after the ignition is changed to OFF	Off	On	Off	On
Ignition is OFF and doors are unlocked from the door lock switch	Off	On for 25 seconds	Off	Off
Ignition is OFF and doors are locked from the door lock switch	Off	Off	Off	Off

Demand Lamps

When the BCM is in not in battery saver mode, the interior light output is energized to provide voltage to the demand lamps. The demand lamp relay is integrated into the BCM and is not serviced separately.

Ambient Lighting

The ambient lighting subsystem consists of the BCM and the Light Emitting Diodes (LEDs) located within the floor console, front and rear door panels and front and rear footwell areas. The ambient lighting is operational when the ignition is in any state other than OFF (the exception is when it is used in conjunction with the illuminated entry/exit features), the headlamps are on and the outside ambient light level is low. The BCM provides the voltage to the ambient lighting system, while the touchscreen ( FDIM ) is used to cycle through the different color variations or turn the ambient lighting feature on or off. A LIN circuit is routed from the BCM to all of the Light Emitting Diodes (LEDs). There are 3 Light Emitting Diodes (LEDs) (red, blue and green) housed within each LED assembly. By illuminating various color combinations, the Light Emitting Diodes (LEDs) are able to produce different colors of ambient light.

The APIM uses software to monitor the user interface from the touchscreen. Based on the ambient lighting system selections made using the touchscreen, the APIM sends ambient light color request and ambient light intensity request messages over the communication network for color and brightness settings. The BCM retains the last color and brightness setting between uses.

Component Description

Door Ajar Switches

The door ajar switches (ground switches) each receive a voltage signal from the BCM on independent circuits. When the door is closed, the door ajar switch is closed, routing the signal to ground. When the door is opened, the door ajar switch opens.

Interior Lamp

All of the interior demand lamps receive voltage from the demand lamp relay (integrated into the BCM ) when the battery saver feature is not active. This is used by each interior lamp to power the demand LED within it.

All of the interior courtesy lamps receive voltage from the interior lighting output of the BCM . This is used by each interior lamp to power the courtesy LED within it.

For vehicles with an overhead console, the front interior lamp sends a message to the rear lamps to activate/deactivate them through a LIN circuit.