AUTO LIGHT SYSTEM

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Outline

•  The auto light system automatically turns the TNS, headlight, and panel light on/off according to the illumination level above and in front of the vehicle.
•  The auto light system is controlled by the front body control module (FBCM).

Function

•  The auto light system receives a TNS and headlight illumination/off request signal from the auto light sensor and the front body control module (FBCM) turns the TNS, panel light and headlights on and off.
•  If the upward and forward illumination sensors detect the illumination level at which the TNS, panel light and headlights should be illuminated/turned off, the auto light sensor sends a TNS and headlight illumination/off request signal.

Structural View

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System Wiring Diagram

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Operation

Note
•  When the ignition is switched ON (engine on or off), the auto light sensor detects the illumination level above and in front of the vehicle regardless of the light switch position.
•  The auto light system operates when the ignition is switched ON (engine on or off) and the light switch is in the AUTO position.
•  The following illumination level is a reference. The illumination level varies depending on the surrounding conditions (weather, reflection off buildings).
•  The illumination level sensitivity of the auto light sensor can be changed. The illumination level in the explanation for the following operations is the value when setting to [Medium]. (See LIGHTING SYSTEM PERSONALIZATION.)

Panel light on operation

1.  When the light switch is operated to the AUTO position, a light switch AUTO signal is input to the start stop unit.

2.  The start stop unit sends the light switch AUTO signal to the front body control module (FBCM) via CAN communication.

3.  When the ignition switched ON (engine off or on), the auto light sensor detects the illumination level above the vehicle.

4.  When the auto light sensor detects the average 700 lux or less per 1 min, it sends a TNS on signal to the front body control module (FBCM) via LIN communication.

5.  When the front body control module (FBCM) receives the TNS on signal, it turns the panel light on.

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Panel light off operation

1.  When the light switch is operated to the AUTO position, a light switch AUTO signal is input to the start stop unit.

2.  The start stop unit sends the light switch AUTO signal to the front body control module (FBCM) via CAN communication.

3.  When the ignition switched ON (engine off or on), the auto light sensor detects the illumination level above and in front of the vehicle.

4.  When the auto light sensor detects the average 1,400 lux or more per 1 min, it sends a TNS off signal to the front body control module (FBCM) via LIN communication.

5.  When the front body control module (FBCM) receives the TNS off signal, it turns the panel light off.

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Headlight and TNS on operation

1.  When the light switch is operated to the AUTO position, a light switch AUTO signal is input to the start stop unit.

2.  The start stop unit sends the light switch AUTO signal to the front body control module (FBCM) via CAN communication.

3.  When the ignition switched ON (engine off or on), the auto light sensor detects the illumination level above the vehicle.

4.  When the auto light sensor detects the average 2,000 lux or less per 1 min, it sends a TNS and headlight on signal to the front body control module (FBCM) via LIN communication.

5.  When the front body control module (FBCM) receives the TNS and headlight on request signal with the dimmer switch in the LO position, it turns the transistor, TNS relay, and headlight LO relay on and illuminates the TNS, parking lights, and headlight LO. With the dimmer switch in the HI position, it turns the transistor, TNS relay, and headlight HI relay on and illuminates the TNS, parking lights, and headlight HI.

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Headlight and TNS off operation

1.  When the light switch is operated to the AUTO position, a light switch AUTO signal is input to the start stop unit.

2.  The start stop unit sends the light switch AUTO signal to the front body control module (FBCM) via CAN communication.

3.  When the ignition switched ON (engine off or on), the auto light sensor detects the illumination level above and in front of the vehicle.

4.  When the auto light sensor detects the average 4,000 lux or more per 1 min, it sends a TNS and headlight off signal to the front body control module (FBCM) via LIN communication.

5.  When the front body control module (FBCM) receives the TNS and headlight off request signal with the dimmer switch in the LO position, it turns the transistor, TNS relay, and headlight LO relay off and turns the TNS, parking lights, and headlight LO off. With the dimmer switch in the HI position, it turns the transistor, TNS relay, and headlight HI relay off and turns the TNS, parking lights, and headlight HI off.

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