Mazda CX-5 Service & Repair Manual: Panel Light

Purpose

• The panel light adjusts the instrument cluster and steering switch illumination brightness.

Function

• The instrument cluster adjusts the brightness of the following illumination lights when a TNS illumination signal sent via CAN transmission from the front body control module (FBCM) is received.

• Instrument cluster

• Climate control unit

• Steering switch

• Cluster switch

• Hazard warning switch

• Selector illumination

• Audio unit

• Clock (with manual A/C)

• The instrument cluster changes the brightness of the illumination lights according to the rotation signal of the panel light control switch.

Construction

• The panel light control switch is set in the instrument cluster.

  

  
  

Operation

• When the ignition is switched ON (engine off or on), the instrument cluster receives (1) the TNS illumination signal from the front body control module (FBCM).

• The instrument cluster performs the following controls when it receives the TNS illumination signal.

• Changes the brightness of the instrument panel illumination.

• Outputs a panel light signal via CAN signal to the climate control unit (with auto A/C)/clock (with manual A/C).

• Turns on the panel light circuit transistor.

• When the transistor turns on, a ground circuit with the panel light is established and the panel light illuminates.

  

  
  

Panel light control switch operation

• When the ignition is switched ON (engine off or on), the instrument cluster receives (1) the TNS illumination signal from the front body control module (FBCM).

• The instrument cluster changes the brightness of the panel light according to the rotation angle when it receives a panel light control switch rotation signal while receiving the TNS illumination signal.

• The instrument cluster outputs a panel light signal to related units.

  

  
  

Fail-safe

• Function not equipped.