Lighting System System Description

The illuminated entry system has the control functions listed in the table below.

The battery saving control system has the following control functions:

This system functions when lights such as the headlight, taillight and front fog light are illuminated by manual operation of the light control switch.

1. The main body ECU receives the following signals (D).
   

   1. Light control switch signal
      
   2. Headlight dimmer switch signal
      
   3. Front fog light switch signal*1
      
   4. Rear fog light switch signal*2
      

2. The main body ECU controls the following signals based on the signals listed in D (E).
   

   1. Headlight relay operation signal
      
   2. Taillight relay operation signal
      
   3. Front fog light relay operation signal*1
      
   4. Rear fog light relay operation signal*2
      

3. The main body ECU controls the on/off operation of the following parts based on the signal listed in E.
   

   1. Headlight (Low)
      
   2. Headlight (High)
      
   3. Front fog light*1
      
   4. Rear fog light*2
      

When the headlight and taillight are both illuminated by the operation of the light control switch, if the ignition switch is turned off, this system turns the headlights and fog lights off immediately. However, when all the doors are locked using the door control switch, emergency key or transmitter lock switch, this system turns the headlight and taillight off immediately. Also, when only the taillight is illuminated by the operation of the light control switch, if the ignition switch is turned off and the driver door is opened, this system turns the headlight, taillights, and fog lights off immediately.

1. The main body ECU receives the following signals (F).
   

   1. Door courtesy light switch signal
      
   2. Ignition switch signal
      

2. The main body ECU controls the following signals based on the signals listed in F (G).
   

   1. Headlight relay operation signal
      
   2. Taillight relay operation signal
      
   3. Fog light relay operation signal
      

3. The main body ECU controls the on/off operation of the following parts based on the signal listed in G.
   

   1. Headlight (Low)
      
   2. Headlight (High)
      
   3. Taillight
      
   4. Front fog light*1
      
   5. Rear fog light*2
      
   1. *1: w/ Front Fog Light
      
   2. *2: w/ Rear Fog Light
      

General

1. This system adjusts the headlight low beams when the vehicle is stopped to maintain a constant level.
   
2. This system is controlled by the headlight leveling ECU. This ECU detects the vehicle posture via the rear height control sensor LH, and detects the vehicle speed via the combination meter. The ECU then controls the headlight leveling motor based on these pieces of information in order to change the headlight reflector angle.
   

NOTICE:

1. Initialize the height control sensor signal after the vehicle height changes due to replacement of the suspension or after performing such operations as removal and reinstallation or replacement of the rear height control sensor LH.
   
2. Initialization is also necessary when the headlight leveling ECU is replaced.
   

Function and construction of components

Fail-safe
The headlight leveling ECU operates in fail-safe mode if an abnormal condition has been detected, and illuminates the automatic headlight beam level control system warning light in the combination meter when a malfunction is detected in the headlight beam level control system.

General
When the low beam headlights are on, the automatic headlight beam level control system operates the headlight leveling motor in accordance with the movement of the vehicle. The headlight swivel ECU controls the system.

Function of Main Components

1. *1: w/o Active Height Control Suspension
   
2. *2: w/ Active Height Control Suspension
   

Initial Set Control
When the engine is started, the headlight swivel ECU drives the headlight leveling motor, moving the headlight reflector to the lower limit position and returning it to the proper position. The headlight swivel ECU thus assesses the position of the headlight for reference control.

NOTICE:

1. Initialize the headlight swivel ECU after the headlight swivel ECU is replaced.
   
2. Initialize the headlight swivel ECU (set the zero point of the height control sensor in the headlight swivel ECU) after the vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor LH*.
   

1. *: w/o Active Height Control Suspension
   

The daytime running light system is designed to automatically illuminate the headlights (high intensity parking lights), during the daytime to make the car more visible to other vehicles.

1. The main body ECU controls this system.
   
2. This system is enabled when the conditions below are met:
   - The ignition switch ON.
   - An engine speed signal is input (the engine is running).
   - The light control switch is in the off, tail or AUTO position.
   - Parking brake is released.
   

The automatic high beam system enhances the illumination of the area to the front of the vehicle to improve visibility for the driver. It works by detecting light from the front using the camera built into the inner rear view mirror assembly and switching between the high beams and low beams automatically.

Function of Main Components

Basic Function

1. When all of the following conditions are met, the automatic high beam system is activated and the automatic high beam indicator light turns on:
   

   1. The ignition switch ON.
      
   2. The light control switch is in the AUTO position and the low beam headlights are on.
      
   3. The dimmer switch is in the high position.
      

When all of the following conditions are met, the low beams automatically change to the high beam after a short delay:

1. The vehicle speed is more than approximately 34 km/h (21 mph).
   
2. The area in front of the vehicle is dark.
   
3. There are no oncoming vehicles with headlights on.
   
4. There are no preceding vehicles with taillights on.
   

When any of the following conditions are met, the high beams automatically change to the low beams after a short delay:

1. The vehicle speed is less than 27 km/h (17 mph).
   
2. The level of ambient light is higher than a specified threshold.
   
3. There are oncoming vehicles with headlights on.
   
4. There are preceding vehicles with taillights on.
   
5. There are several streetlights along the street ahead.
   

When any of the following conditions are met, the automatic high beam system will be canceled and the indicator light will turn off.

1. The ignition switch off.
   
2. The light control switch is turned to any position except the AUTO position.
   
3. The low beam headlights are turned off.
   
4. The dimmer switch is moved to the low position.
   

   HINT:

   1. It is possible to manually switch between the high beams and low beams using either of the following operations:
      - Turn the light control switch from the AUTO position to the high position. In this case, the high beams turn on according to the dimmer switch high position. To change to the low beams, move the dimmer switch to the low position.
      - Move the dimmer switch from the high position to the low position. In this case, the low beams turn on according to the dimmer switch position.
      
   2. The automatic high beam system monitors the area in front of the vehicle using the camera built into the inner rear view mirror assembly and makes a judgment to change from the low beams to the high beams when the surrounding area is dark (there are no headlights from oncoming vehicles and no taillights from vehicles in front). High beam control limitations:
      - When the surrounding area is not dark enough, the low beams will not change to the high beams even if the low beam headlights are turned on by the automatic light control system and the automatic high beam indicator light on the combination meter assembly illuminates. (The light level sufficient to turn the auto low beams on is not the same as the light level required to automatically change the low beams to the high beams.)
      - When an oncoming vehicle suddenly appears at a sharp curve or a vehicle crosses the path of the vehicle, the high beams may not change to the low beams.
      - When the fog lights of an oncoming vehicle are detected, the high beams may change to the low beams.
      - The timing of the change between the high beams and low beams may differ depending on the brightness of headlights or fog lights from oncoming vehicles or the taillights of preceding vehicles.
      - The timing of the change between the high beams and low beams may differ between normal conditions (good weather) and when driving on wet, frozen or snowy roads.
      - The timing of the change between the high beams and low beams may differ depending on the number of occupants and amount of cargo present.
      - Be aware that on some occasions, the high beams and low beams may change unexpectedly.
      
   3. The camera built into the inner rear view mirror assembly continually monitors the light level in the area in front of the vehicle. There is a delay in switching the low beams to the high beams. Even when there is no ambient light, the low beams will not change to the high beams immediately. The delay will vary depend on the situation.
      

The automatic high beam system detects light in front of the vehicle using the camera built into the forward recognition camera and switches between high and low beams automatically.

Function of Main Components