Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - LIGHTING EXT
LIGHTING SYSTEM - SYSTEM DESCRIPTION
| ILLUMINATED ENTRY SYSTEM |
except Double Swing Out Type:
When the doors are unlocked by a key or door control transmitter operation, when a door is opened or closed, or when the vehicle is approached while holding the door control transmitter, the illuminated entry system turns on the room light, map light and ignition switch illumination.
for Double Swing Out Type:
When the doors are unlocked by a key or door control transmitter operation, when a door is opened or closed, the illuminated entry system turns on the room light and map light.
The main body ECU receives the following signals (A).
The main body ECU controls the following signal based on the signals listed in A.
The main body ECU controls the on/off and fade-in/fade-out operation of the following parts.
| BATTERY SAVE SYSTEM |
The battery save system is a basic function which turns off the applicable interior lights after approximately 20 minutes if any door is left open or ajar when the ignition switch is turned off. Also, on vehicles with a dome cut relay, the system also has an interior light auto cut function, which turns off the applicable interior lights approximately 20 minutes after the ignition switch is turned off regardless of the open/close status of the doors or the position of the map light switch.
| MANUAL LIGHT CONTROL SYSTEM |
This system functions when lights such as the headlight, taillight and front fog light are illuminated by manual operation of the light control switch.
The main body ECU receives the following signals (D).
The main body ECU controls the following signals based on the signals listed in D (E).
The main body ECU controls the on/off operation of the following parts based on the signal listed in E.
| LIGHT AUTO TURN OFF SYSTEM |
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.
The main body ECU receives the following signals (F).
The main body ECU controls the following signals based on the signals listed in F (G).
The main body ECU controls the on/off operation of the following parts based on the signal listed in G.
| AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM (w/ Static Headlight Auto Leveling) |
General
- NOTICE:
Function and construction of components
| Components | Function and Construction |
| Rear Height Control Sensor LH | Detects the vehicle height. |
| Combination Meter | Outputs the vehicle speed signal to the headlight leveling ECU. Headlight beam level control system warning light in the combination meter illuminates for 3 seconds and then turns off when the ignition switch is turned to ON (bulb check function). Headlight beam level control system warning light in the combination meter illuminates to alert the driver when a malfunction in this system is detected. |
| Headlight Leveling Motor | Based on the signals received from the headlight leveling ECU, each motor moves the reflector in the headlight to vary its low beam height. |
| DLC3 | The height control sensor signal initialization and headlight leveling motor operation check can be performed via the DLC3. |
| Headlight Swivel ECU | Based on the signals that are transmitted by the rear height control sensor LH and combination meter, this ECU detects the amount of variance of the vehicle posture with the vehicle stopped. Based on the detected value, this ECU outputs control signals to the headlight leveling motor. This ECU turns on the headlight beam level control system warning light for 3 seconds when the ignition switch is turned to ON (bulb check function). This ECU turns on the headlight beam level control system warning light to alert the driver when a malfunction in this system is detected. |
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.
| AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM (w/ Dynamic Headlight Auto Leveling) |
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
| Component | Function and Construction |
| Headlight Swivel ECU | Receives various signals, calculates changes in the vehicle posture and actuates the headlight leveling motor. |
| Headlight Leveling Motor | Based on the signals received from the headlight swivel ECU, the motors move the reflectors in the headlights to vary the low beam angle. Uses a stepper motor to precisely regulate the angle of the projectors. |
| Rear Height Control Sensor LH*1 | Transmits a height control sensor signal to the headlight swivel ECU. |
| Suspension Control ECU*2 | Transmits a height control sensor signal to the headlight swivel ECU. |
| Skid Control ECU | Transmits a speed sensor signal to the headlight swivel ECU. |
| ECM | Transmits an engine running status signal to the headlight swivel ECU. |
| Main Body ECU | Transmits a headlight status signal. |
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:
| DAYTIME RUNNING LIGHT SYSTEM (w/ Daytime Running Light) |
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.
- 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.
| AUTOMATIC HIGH BEAM SYSTEM (w/ Automatic High Beam System) |
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
| Component | Outline |
| Inner Rear View Mirror Assembly (automatic high beam sensor) | Determines when to switch between the high beams and low beams after identifying the lights of oncoming vehicles, preceding vehicles and other lights from the picture information of its camera sensor. Then, it sends high beam request signals to the Headlight swivel ECU. |
| Headlight Swivel ECU | Acts as the gateway between the inner rear view mirror assembly (automatic high beam sensor) which uses CAN communication. In addition, it stores Diagnostic Trouble Codes (DTCs) if an inner rear view mirror assembly (automatic high beam sensor) malfunction occurs. |
| Skid Control ECU | Outputs the information about the speed of the front wheel. This information is used by the inner rear view mirror assembly (automatic high beam sensor) to control switching between the high beams and low beams of the automatic high beam system. |
| ECM | Outputs a signal to indicate that the shift lever is in R. Based on this signal, the inner rear view mirror assembly (automatic high beam sensor) turns the high beams off. |
| Combination Meter Assembly | Displays the automatic high beam indicator light when it receives illuminate or blink request signals from the main body ECU. The automatic high beam indicator light flashes to inform the driver when there is a malfunction in this system. The automatic high beam indicator light illuminates to inform the driver when the automatic high beam system is activated. The automatic high beam indicator light may turn off when there is bad weather (thick fog, heavy rain, etc.), an abnormal condition with the front windshield (snow, ice, etc.), or an obstruction to the camera field of view (parking tag, etc.). |
| Main Body ECU (Cowl Side Junction Block LH) | Receives the light control switch AUTO position and dimmer switch high position signals from the headlight dimmer switch, receives the automatic light control sensor signal to determine the low beam headlight illumination condition, and sends this information to the Headlight swivel ECU. This is used to put the automatic high beam system in standby mode. Receives high beam drive request signals from the Headlight swivel ECU. Performs illumination control for the automatic high beam system and stores Diagnostic Trouble Codes (DTCs) when the system malfunctions. |
Basic Function
When all of the following conditions are met, the automatic high beam system is activated and the automatic high beam indicator light turns on:
When all of the following conditions are met, the low beams automatically change to the high beam after a short delay:
When any of the following conditions are met, the high beams automatically change to the low beams after a short delay:
When any of the following conditions are met, the automatic high beam system will be canceled and the indicator light will turn off.
- HINT:
- 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.
- 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.