System Operation
Interior Lighting
System Operation
System Diagram
Network Message Chart
BCM (Body Control Module) Network Input Messages
Battery Saver
NOTE: Time-out is 10 seconds if the vehicle is in Factory mode or 0 seconds if the vehicle is in Transport mode.
The BCM (Body Control Module) 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 (Body Control Module) starts when:
- the ignition changes to OFF,
- any door or liftgate/luggage compartment lid becomes ajar,
- an UNLOCK button of the RKE (Remote Keyless Entry) transmitter is pressed,
- a door is unlocked using a key, or
- the door lock switch is pressed.
When 10 minutes (30 minutes for demand lamps) have elapsed, the BCM (Body Control Module) automatically shuts off voltage to the lamps. The timer restarts (voltage is restored if the BCM (Body Control Module) is in battery saver mode) if:
- the ignition changes out of OFF,
- any door or liftgate/luggage compartment lid becomes ajar,
- the UNLOCK button of the RKE (Remote Keyless Entry) transmitter is pressed,
- a door is unlocked using a key, or
- the door lock switch is pressed.
Courtesy Lamps
The BCM (Body Control Module) controls the courtesy lighting functions and timing by monitoring inputs from the following:
- door ajar switches
- ignition state
- RKE (Remote Keyless Entry) system
For vehicles equipped with puddle lamps, the DDM (Driver Door Module) and the PDM (Passenger Door Module) provide voltage to the left and right puddle lamps based on messaged input from the BCM (Body Control Module) over the communication network.
The BCM (Body Control Module) sends a voltage signal to each door ajar switch. When all the doors are closed, all the voltage signals are pulled low, indicating closed doors.
On vehicles equipped with door modules, each door module provides ground for the door ajar switch.
The BCM (Body Control Module) monitors the ignition state and inputs from the RKE (Remote Keyless Entry) 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 (Body Control Module) controls the ground side of the courtesy lamps for the illuminated entry and exit features.
For keyless entry, the BCM (Body Control Module) monitors input from the RKE (Remote Keyless Entry) transmitter (directly from the IKTs (Integrated Keyhead Transmitters) on vehicles without IA (Intelligent Access)) or from the RFA (Remote Function Actuator) module (on vehicles with IA (Intelligent Access)) to determine when to activate/deactivate the illuminate entry and exit functions.
The interior courtesy lamps can also be activated from the courtesy lamp switch mounted on the front/driver interior lamp. The front interior lamp (vehicles without a roof opening panel) or the driver interior lamp (vehicles with a roof opening panel) controls the courtesy lamp function of the remaining interior lamp(s). When the courtesy lamp button is pressed on the front/driver interior lamp, the courtesy lamp function for all the lamps is turned on/off. If any door is open, the BCM (Body Control Module) command overrides the function of the front/driver courtesy lamp switch and activates 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 (Body Control Module) 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).
Demand Lamps
When the BCM (Body Control Module) is in not in battery saver mode, the interior light relay is energized to provide voltage to the demand lamps.
Ambient Lighting
The ambient lighting subsystem consists of the ambient lighting switch, dimmer control and the ambient lighting module (all integrated into the overhead console), and the LEDs (Light-emitting Diodes) located within the floor console, front door panels and under the instrument panel 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 ambient lighting switch cycles the LEDs (Light-emitting Diodes) through 7 different color combinations. The brightness is changed using the dimmer control which allows the LEDs (Light-emitting Diodes) to be turned off as well.
The right search mode control switch activates all ambient light areas and all dome lamps. The search mode control switch needs to be pressed again to deactivate the dome lamps and return to the previously selected ambient light color.
The ambient lighting control module controls the color and light intensity. The ambient lighting module receives information from the BCM (Body Control Module) through a LIN (Local Interconnect Network) circuit for illuminated entry/exit functions. The ambient lighting module provides voltage to all of the LEDs (Light-emitting Diodes). A secondary LIN (Local Interconnect Network) circuit is routed from the ambient lighting module to all of the LEDs (Light-emitting Diodes). Each LED (Light-emitting Diode) changes color and intensity based on the input from the ambient lighting module.
As an additional function, the ambient lighting illuminates red on any open door.