NIGHT VIEW SYSTEM DETAILS


  1. FUNCTION OF MAIN COMPONENTS


    1. The main components in the Lexus night view have the following functions:

      Components Outline
      No. 1 Night View ECU

      • Controls Lexus night view using each type of vehicle information.

      • Outputs the image signals to the accessory meter assembly in accordance with the signals from the night view camera assembly.
      Night View Camera Assembly Receives light from the area ahead of the vehicle to which near-infrared ray light radiates, and outputs it to the No. 1 night view ECU as image signals.

      Headlight Assembly

      - Near-infrared Ray Light

      		 Radiates near-infrared rays forward when the Lexus night view is operating.
      Light Control Sensor Detects the lighting intensity on the periphery, and sends it to the No.1 night view ECU.
      Night View Switch Switches the Lexus night view on and off.
      Accessory Meter Assembly Shows the night view display in accordance with the signals from the No.1 night view ECU.
      Combination Meter Assembly Shows the warning display on the multi-information display to inform the driver when there is a malfunction in the Lexus night view.

  2. OPERATING CONDITION


    1. The Lexus night view will activate when the following conditions are met:

      Conditions Vehicle Speed Near-infrared Ray Light

      • Power switch is turned on (IG).

      • Headlight is low/high beam.

      • The light control sensor judges that the area around the vehicle has become dark.

      • Night view switch is turned on.

      		 Approx. 15 km/h (9.3 mph) or more Turns on
      Approx. less than 15 km/h (9.3 mph) Turns off*

      Tech Tips

      *: Even though the night view display is shown on the accessory meter assembly, the visualizable area and distance will be decreased because the near-infrared rays are not radiated.

    2. When the night view switch is pressed at a time when the Lexus night view cannot be operated, an advice display will be shown on the multi-information display of the combination meter assembly.

    3. When the shift lever is moved to R while the Lexus night view is operating, the night view display becomes dark and shows no image.

  3. FUNCTION


    1. When a malfunction occurs in the Lexus night view, a warning message is shown on the accessory meter assembly as follows:

      Warning Message Condition

      Check night view system

      Have your vehicle checked by a dealer

      		 System Malfunction

  4. CONSTRUCTION


    1. Near-infrared Ray Light


      1. The near-infrared ray light is built into the headlight assembly.

      2. The light source consists of an LED, which is the same as an ordinary high-beam headlight. The amount of the radiated energy is also the same as that of a high-beam headlight. This construction enables the system to capture a field of vision that is farther than of the low-beam headlight.

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        Text in Illustration
        *A Models with HID Headlight System *B Models with LED Headlights
        *1 Reflector *2 Near-infrared Ray Light (LED Light)
        *3 LED Driver - -

    2. Night View Camera Assembly


      1. The night view camera assembly is located on the forward center of the roof head lining.

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        Text in Illustration
        *1 Night View Camera Assembly - -

      2. The night view camera assembly can image the area ahead of the vehicle to which near-infrared rays are radiated, which is 15 degrees horizontally and 13 degrees vertically.

      3. The night view camera assembly has a built-in visible rays cut filter to block anything except near-infrared rays.

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  5. OPERATION


    1. Display Transition


      1. The screen will undergo the following transitions when the Lexus night view activates and while it is operating:

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        Item Transition Condition
        *1 The night view switch is turned on when it is bright on periphery of the vehicle.
        *2 A certain amount of time has elapsed.
        *3 The night view switch is turned on without the headlight low-beam illuminated at night.
        *4 The night view switch is turned off.
        *5 The night view switch is turned on when the operating conditions of Lexus night view are met.
        *6 It is no longer dark on periphery of the vehicle.
        *7 Headlight low-beam is turned off.
        *8 Headlight low-beam is turned on.
        *9 Operation is carried out using the main display, or an interrupt display is shown on the main display.
        *10 The button to show the main display in the night view display is selected.
        *11 The shift lever is moved from R to any other position.
        *12 The shift lever is moved to R.
        *13 The headlight low-beam is not turned on when the shift lever is moved from R to any other position.

  6. DIAGNOSIS


    1. If the No. 1 night view ECU detects a malfunction in the Lexus night view, it stores the malfunction data in memory.

    2. The No. 1 night view ECU outputs 5-digit Diagnostic Trouble Codes (DTCs) to a Global TechStream (GTS).

    3. The 5-digit DTCs can be read after connecting a Global TechStream (GTS) to the DLC3. For details refer to the Repair Manual.