Lighting Systems
INTERIOR LIGHTING
NOTE: The smart junction box (SJB) is also known as the generic electronic module (GEM).
The SJB controls all of the interior lighting functions. The interior lighting system consists of the following components:
- SJB
- Dimmer control switch
- Interior lamps
- Vanity mirror lamps
- Door ajar switches (integrated into the door latch)
- Liftgate/liftgate glass ajar switches
The interior lighting system consists of 2 subsystems:
- Courtesy lamps
- Demand lamps
Courtesy Lamps
The courtesy lamps are controlled by the SJB. The courtesy lamp subsystem consists of the ajar switches, the interior dome lamps, the instrument panel dimmer switch and the overhead console lamps (if equipped). The SJB supplies voltage to the courtesy lamps when the SJB receives the required input.
Interior Mode
The interior courtesy lamps turn on when the instrument panel dimmer switch is rotated to the DOME LAMP position. When the instrument panel dimmer switch is not in the DOME LAMP position, the interior courtesy lamps are activated by other interior lighting features.
The cargo lamp does not illuminate when the cargo lamp switch is in the OFF position when the courtesy lamps are activated. For the cargo lamp to illuminate in conjunction with the courtesy lamps, the cargo lamp switch must be in the DOOR position.
Dome Defeat
When the instrument panel dimmer switch is in the DOME DEFEAT position, the illuminated entry and exit features do not turn the courtesy lamps on, however the timer for each feature is still active. If the instrument panel dimmer switch is moved out of the DOME DEFEAT position before the 25-second timer expires, the courtesy lamps are illuminated until the 25-second timer has elapsed.
Interior Lighting Delay
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 keeps the courtesy lamps on for a period of 25 seconds after all the doors are closed. If during the 25-second delay time the SJB detects that the ignition has been switched out of OFF, or if the vehicle is locked using the remote keyless entry (RKE) transmitter, the courtesy lamp illumination is discontinued.
Illuminated Entry
The illuminated entry requests the courtesy lamps to illuminate when the ignition is OFF and the RKE transmitter UNLOCK button is pressed. The illuminated entry requests the courtesy lamps off:
- after 25 seconds have elapsed.
- the ignition is switched out of OFF.
- the RKE transmitter LOCK button is pressed.
Illuminated Exit
The illuminated exit requests the courtesy lamps to illuminate for 25 seconds when all doors are closed and the ignition key is removed from the ignition lock cylinder. The illuminated exit deactivates:
- when the ignition key is inserted into the ignition lock cylinder.
- a door becomes ajar.
- 25 seconds have elapsed.
Theater Lighting
The theater lighting feature ramps-up the courtesy lamps over 0.7 second when courtesy lamp activation is requested. The theater lighting feature ramps-down the courtesy lamps over 1.7 seconds when interior lighting deactivation is requested by any feature other than the panic alarm or battery saver.
Demand Lamps
The demand lamps are provided voltage from the battery saver relay (integrated into the SJB). The demand lamps subsystem consists of the map/reading lamps, cargo lamp and the LH and RH vanity mirror lamps. The SJB energizes the battery saver relay to supply voltage to the demand lamps.