HIGH-MOUNT BRAKE LIGHT
id091800706400
Purpose
• The high-mount brake light signals vehicles to the rear that the vehicle is decelerated or stopping.
Function
• The high-mount brake light illuminates in conjunction with the operation of the brake switch.
Structure/Construction
• The high-mount brake light is positioned on the rear spoiler.
• The high-mount brake light has adopted a LED.
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Note
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• Fogging or condensation on the inside of the high-mount brake light may occur, however, it is a natural phenomenon occurring as a result of a temperature difference between the interior and exterior of the high-mount brake light and has no effect on the light performance. Fogging or condensation will dissipate when the temperature inside the high-mount brake light rises after the high-mount brake light is illuminated and a period of time has elapsed.
Operation
Operation due to brake pedal operation
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1. When the brake pedal is depressed, the brake switch (No.1 signal) turns on (1).
2. When the brake switch (No.1 signal) turns on, the electrical supply unit (ESU) detects (2) a brake switch (No.1 signal) on signal.
3. When the electrical supply unit (ESU) detects the brake switch (No.1 signal) on signal, it turns the high-mount brake light on (3).
Operation due to operation request signal from body control module (BCM)
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1. When the operation conditions are met, the body control module (BCM) sends (1) the brake control request signal to the electronically controlled brake unit via CAN communication.
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Note
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• For the operation conditions, refer to the followings:
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2. The electronically controlled brake unit sends (2) the brake control request signal to the electrical supply unit (ESU) via CAN communication as a brake light signal.
3. When the electrical supply unit (ESU) receives the brake light signal, it turns the high-mount brake light on (3).
