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2016 – MX-5 – Body and Accessories

PANEL LIGHT

Purpose

• The panel light adjusts the brightness of illumination lights such as the instrument cluster and steering switch illumination.

Functions

• The instrument cluster adjusts the brightness of the following illumination lights when it receives a TNS (parking lights) signal sent via CAN communication from the BCM.

• Instrument cluster

• Climate control unit

• Steering switch

• Cluster switch

• Hazard warning switch

• Shift panel (indicator) (AT)

• Drive selection switch (With drive selection system)

• Indicator unit

• Audio unit (Without center display)

• CD player

• Commander switch (With center display)

• Trunk lid opener switch

• Cruise control switch

• 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 positioned in the instrument cluster.

  

Operation

Panel light on operation

• When the instrument cluster receives (1) a TNS (parking lights) signal from the BCM via CAN communication while the ignition is switched ON (engine off or on), it performs the following controls.

• Changes (2) the brightness of illumination lights in the instrument cluster.

• Sends (2) a panel light on request signal to the climate control unit via CAN communication.

• Sends (2) a panel light on request signal to the indicator unit via serial communication.

• Turns (2) the panel light-related parts circuit transistor on.

• When the transistor turns on, a ground circuit with the panel light-related parts is established, and the illumination lights for the panel light-related parts turn on (3).

  

Panel light control switch operation

• When the instrument cluster detects (2) a panel light control switch rotation signal while a panel light illumination request signal is being output (1), it performs the following controls.

• Changes (3) the brightness of illumination lights in the instrument cluster and panel-light related module.

• Changes (3) the panel light on request signal brightness being sent to the climate control unit via CAN communication.

• Changes (3) the panel light on request signal brightness being sent to the indicator unit via serial communication.

• If the instrument cluster detects (4) that the panel light control switch is in the maximum right rotation position, it maximizes (5) the brightness of the illumination lights and panel-light related module, and sends (6) a dimmer cancel signal to the climate control unit and indicator unit.

  

Fail-safe

• Not applicable

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