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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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HBC INDICATOR LIGHT (GREEN)/HBC WARNING LIGHT (AMBER)

Purpose

HBC indicator light (green)

  • The HBC indicator light (green) notifies the driver that the high beam control (HBC) system is operating.

HBC warning light (amber)

  • The HBC warning light (amber) warns the driver that a malfunction is occurring in the high beam control (HBC) system.

Functions

HBC indicator light (green)

  • The instrument cluster turns the HBC indicator light (green) on based on the system conditions display request signal sent from the forward sensing camera (FSC) as a CAN signal.

HBC warning light (amber)

  • The instrument cluster turns the HBC warning light (amber) on based on the system conditions display request signal sent from the forward sensing camera (FSC) as a CAN signal.

  • The instrument cluster flashes the HBC warning light (amber) based on the system malfunction display request signal sent from the forward sensing camera (FSC) as a CAN signal.

  • The flash pattern of the HBC warning light (amber) is as indicated in the table.

Construction

  • The HBC indicator light (green) and HBC warning light (amber) are built into the instrument cluster.

  • A warning message is indicated in the center display when the HBC warning light (amber) is turned on. (With center display) For the message content and verification method, refer to the [CENTER DISPLAY]. (See CENTER DISPLAY [WITH CENTER DISPLAY].)

Operation

HBC indicator light (green)

  • When the high beam control (HBC) system operates, the forward sensing camera (FSC) sends (1) a system condition display request signal to the instrument cluster via CAN communication.

  • The instrument cluster turns the transistor on (2) based on the system condition display request signal.

  • When the transistor turns on, a ground circuit with the HBC indicator light (green) is established, and the HBC indicator light (green) turns on (3).

HBC warning light (amber)

  • If there is a malfunction in the high beam control (HBC) system, the forward sensing camera (FSC) sends (1) a system malfunction display request signal or system condition display request signal to the instrument cluster via CAN communication.

  • The instrument cluster turns the transistor on (2) intermittently for a system malfunction indication request signal and continuously for a system conditions display request signal.

  • When the transistor is turned on intermittently, the HBC warning light (amber) flashes, and when it is turned on continuously, the HBC warning light (amber) turns on (3).

Fail-safe

  • Not applicable

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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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