Lighting and Horns: Description and Operation

LIGHTING: LIGHTING SYSTEM: SYSTEM DIAGRAM

SYSTEM DIAGRAM





LIGHTING: LIGHTING SYSTEM: SYSTEM DESCRIPTION

SYSTEM DESCRIPTION

1. MANUAL LIGHT CONTROL SYSTEM
This system functions if the lights such as the headlights and taillights come on by manual operation of the light control switch.
(a) The main body ECU controls this system based on the signals listed below.






2. AUTOMATIC LIGHT CONTROL SYSTEM
When the light control switch is in the AUTO position, the automatic light control sensor detects ambient light, converts it into an electrical signal, and outputs it to the main body ECU. The main body ECU automatically turns the headlights and taillights on or off according to the signal.
(a) The main body ECU controls this system based on the signals listed below.






3. LIGHT AUTO TURN OFF SYSTEM
When the headlights and taillights are on through the operation of the automatic light control system or through the light control switch, if the power switch is turned off and all doors are closed, this system continues to illuminate the headlights and taillights for approximately 30 seconds, and then turns off the headlights and taillights.
However, if the power switch is turned off and all doors are locked, this system turns off the headlights and taillights immediately.
(a) The main body ECU controls this system based on the signals listed below.






4. DAYTIME RUNNING LIGHT SYSTEM
This function is designed to automatically illuminate the headlights (dimmed HI beams), during the daytime to make the car more visible to other vehicles.
- The main body ECU and power distributor control this system. The main body ECU transmits a turn ON signal to the power distributor and the power distributor illuminates the HI beams using a duty control.
- This system is enabled when the conditions given below are met:

- Power switch is on (IG).
- READY condition signal is received.
- Light control switch is in OFF*, TAIL or AUTO position (if headlight-on control is not being performed by the automatic light control).
HINT: *: only for Canadian package models.

- Parking brake switch is OFF.

5. ILLUMINATED ENTRY SYSTEM
When a door is unlocked through a key or transmitter operation, or if a door is opened, the illuminated entry system turns on the interior light and the power switch illumination.
(a) The main body ECU controls this system. The operation and condition of the illuminated entry system are described below.






6. POWER DISTRIBUTOR
(a) General
- The power distributor is built into the engine room relay block, and uses a small mechanical relay and semiconductor relay for a compact and lightweight design.
- The power distributor has a headlight control function. This function dims the high beam headlights in accordance with operation signals from the main body ECU while the daytime running light system is operating.
- The power distributor dims the high beam headlights using a duty control.
- When a short circuit occurs between the power distributor and high beam headlight bulb, a fail-safe function operates to stop the DRL relay operation.





(b) The components of the power distributor are shown below.