Interior Lamps Dimming
The second group includes lamps which may be dimmed. This group may use a combination of light emitting diodes (LED), incandescent lamps, and pulse width modulation illumination.
- Accent lamp - center console cupholder
- Accent lamp - driver door handle
- Accent lamp - passenger door handle
- Accent lamp - right instrument panel
- Dome lamp switch
- Door lock switch - driver
- Door lock switch - passenger
- Drive mode select switch
- Flood lamp - driver door handle
- Flood lamp - passenger door handle
- Garage door opener
- Hazard warning switch
- Headlamp switch
- Ignition mode switch
- Liftgate control switch - interior
- Multifunction switch - center console
- Parking assist on/off switch
- Park brake switch
- Seat memory switch - driver
- Steering wheel controls switch - left
- Steering wheel controls switch - right
With the headlamp switch in the PARK or HEAD position, the park lamp switch signal circuit provides an input to the body control module (BCM). The BCM responds by applying voltage to the park lamps as well as the backlight dimming control circuits illuminating all components with interior backlighting. All interior backlighting turns ON at the dimming level indicated by the instrument panel dimmer switch. The instrument panel dimmer switch is a momentary type switch and utilizes a resistor ladder to increase and decrease the brightness of the interior backlighting components. The instrument panel dimmer switch provides a voltage signal to the BCM that will increase as the brightness of the lights are increased and decrease as the brightness of the lights are decreased. The BCM provides a low reference signal and a B+ circuit to the instrument panel dimmer switch. When the instrument panel dimmer switch is held in the desired position, the dimmed voltage setting is applied from the instrument panel dimmer switch through the instrument panel dimmer switch signal circuit to the BCM. The BCM interprets the signal and applies a pulse width modulated voltage through the backlighting control circuits illuminating the interior backlighting to the requested level of brightness.
The backlighting for the instrument cluster, infotainment controls, window switches, and steering wheel control switches are controlled by the BCM via serial data. When the instrument panel dimmer switch is operated to the desired backlighting setting, the BCM sends a serial data message to the instrument cluster, infotainment controls, window switches, and steering wheel control switches requesting the backlighting be adjusted to the desired level.