Dimmable Backlighting

When the parking lamps are on, the SJB provides a pulse-width modulated (PWM) voltage to the dimmable instrument panel switches and components. The instrument panel dimmer switch allows the brightness level of the dimmable backlights and displays to be adjusted.

The SJB communicates with the instrument cluster (IC) and audio control module (ACM) through the controller area network (CAN). The IC and ACM then increase or decrease the intensity of the backlighting according to the instrument panel dimmer switch position.

The dimmable components consist of the:

• IC
• ACM
• Instrument panel dimmer switch
• Message center switch
• Hazard flasher switch
• Climate control assembly
• Transmission range (TR) indicator
• Convertible top switch (part of the overhead console) (if equipped)
• Steering wheel switches
• Headlamp switch