Honda HR-V: Exterior Lights System Description - Components

Headlights

The headlight assembly consists of the headlights (low/high beam lights), the front side marker lights, and the front turn signal lights/front parking light.

Front Fog Lights

The front fog lights are installed on the front bumper.

Rear Combination Lights

The taillights consists of the taillights, the brake lights, the rear turn signal lights, and the rear side marker lights on the outside of the vehicle. The back-up lights are built into the inner taillights.

High Mount Brake Light

The high mount brake light is located at the top of the rear window, and it is equipped with the LED.

Side Turn Signal Lights (With side turn signal light)

The side turn signal lights built into the power mirror and it is equipped with the LED.

EXTERIOR LIGHTS SYSTEM DESCRIPTION - CONTROL/FUNCTION

Headlight Function

The headlights are controlled by the MICU, based on combination switch input signals.

Headlight Auto-OFF Function

During the vehicle ignition OFF mode or the driver's door switch OFF (door closed), the input of driver's door lock knob switch (LOCK) will turn the headlights off regardless of the lighting switch position of the MICU.

Turn Signal/Hazard Warning Light Function

The turn signal/hazard warning lights are controlled by the MICU, based on the combination switch or the hazard warning switch signal. Wire break detection of the turn signal lights is monitoring current value by the MICU. In case of an abnormal value, it is registered as a wire break, which leads to an increased turn signal lighting frequency. 130 ms after ON/OFF change of the turn signal output, the current values are sampled three times every 10 ms. When the sampling of the current value shows a discrepancy at all three times, this is registered as a wire break. When all three signals coincide twice in a row, it is considered to be the normal condition. When the sampling of the current value is outside the threshold value range at all three times, this is registered as a wire break. When all three values are within the threshold value range, it is considered to be the normal condition.

Automatic Lighting ON/OFF Control (With automatic lighting)

When the light ON delay time elapses after automatic lighting control unit-sensor output voltage drops to the light ON luminance, the parking lights, the side marker lights, the taillights, the license plate lights, and the headlights turn on. When the light OFF delay time elapses after automatic lighting control unit-sensor output voltage rises to the light OFF luminance, and the parking lights, and the headlights turn off.

One-Push Turn Signal Light

With the vehicle ON mode, when there is a brief input from the turn signal switch (from 40 ms to 1 second), the MICU flashes the left or right turn signal three times in succession.

Daytime Running Light Function

To control the daytime running lights, the MICU can provide power to the high beam based on inputs from the combination light switch signal, parking brake signal, and auto light signal. When on, the MICU provides reduced power to the high beam using duty control. With the ignition ON, the parking brake switch OFF, and the combination light switch in the OFF or PARKING position, the MICU turns on the daytime running lights.

With the ignition ON, the parking brake switch OFF, and the combination light switch in the AUTO position, the MICU turns on the daytime running lights when the automatic lighting control system does NOT command the headlights ON. With the ignition ON, the parking brake switch OFF, and the combination light switch in any position, the MICU will not turn on the daytime running lights. Once the parking brake is turned OFF (automatic lighting control system OFF), the MICU commands the daytime running lights ON. The daytime running lights will then remain ON regardless of the parking brake switch position, until the next key cycle.

Fog Light Function

The front fog lights are controlled by the MICU, based on the combination switch signal.

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