AUDIO AND VISUAL SYSTEM Display does not Dim when Light Control Switch is Turned ON

DESCRIPTION

When the audio and visual system is activated with the light control switch in the tail or head position, before AVC-LAN communication is established, the accessory meter assembly*1 or multi-display*2 dims the display according to the illumination signal received via a direct line.

After AVC-LAN communication is established, the accessory meter assembly*1 or multi-display*2 dims the display according to a dimmer signal sent via a direct line.

The multi-media module receiver assembly switches between the daytime screen and night screen on the accessory meter assembly*1 or multi-display*2 according to the illumination signal input.


DESCRIPTION

A000NIIE07

PROCEDURE


  1. CONFIRM SYMPTOMS


    1. Check the symptoms that occur by viewing the display.

      Result
      Result Proceed to
      There is a delay until the display dims after the audio and visual system is activated with the light control switch in the tail or head position. A
      The display dims for a moment and then becomes bright after the audio and visual system is activated with the light control switch in the tail or head position. B
      When the light control switch is set to the tail or head position, the display dims but does not switch to the night screen.
      When the light control switch is set to the tail or head position, the display neither dims nor switches to the night screen. C

      Tech Tips


      • When the audio and visual system is activated with the light control switch in the tail or head position, before AVC-LAN communication is established, the accessory meter assembly*1 or multi-display*2 dims the display according to the illumination signal received via a direct line.

      • After AVC-LAN communication is established, the accessory meter assembly*1 or multi-display*2 dims the display according to a dimmer signal sent via a direct line.

      • The multi-media module receiver assembly switches between the daytime screen and night screen on the accessory meter assembly*1 or multi-display*2 according to the illumination signal input.


      • *1: for 12.3 Inch

      • *2: for 8 Inch


    B

    CHECK IMAGE QUALITY SETTING Click here

    C

    GO TO LIGHTING SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. A000NXNE02
      Text in Illustration
      *A for 12.3 Inch
      *B for 8 Inch
      *a

      Front view of wire harness connector

      (to Accessory Meter Assembly)
      *b

      Front view of wire harness connector

      (to Multi-display)

      Disconnect the accessory meter assembly*1 or multi-display*2 connector.


      • *1: for 12.3 Inch

      • *2: for 8 Inch

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for 12.3 Inch
      Tester Connection Condition Specified Condition
      N62-13 (GND1) - Body ground Always Below 1 Ω
      for 8 Inch
      Tester Connection Condition Specified Condition
      N155-13 (GND1) - Body ground Always Below 1 Ω

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      for 12.3 Inch
      Tester Connection Switch Condition Specified Condition
      N62-2 (ILL) - Body ground Power switch off, light control switch in tail or head position 11 to 14 V
      for 8 Inch
      Tester Connection Switch Condition Specified Condition
      N155-2 (ILL) - Body ground Power switch off, light control switch in tail or head position 11 to 14 V

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. CHECK IMAGE QUALITY SETTING


    1. Turn the light control switch to the tail or head position.

    2. Check that the daytime screen setting on the display adjustment screen is set to on.

      OK
      Daytime screen setting is set to on.

    OK

    CHANGE DAYTIME SCREEN SETTING TO OFF

    NG

  4. CHECK VEHICLE SIGNAL (OPERATION CHECK)


    1. A000PF9

      Enter the "Vehicle Signal Check Mode" screen. Refer to Check Vehicle Signal in Operation Check Click here.

    2. Check that the display changes between ON and OFF according to the light control switch operation.

      OK
      Light Control Switch Display
      Tail or head ON
      Off OFF

      Tech Tips

      The display is updated once per second. It is normal for the display to lag behind the actual switch operation.


    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)


    1. Disconnect the N164 multi-media module receiver assembly connector.

    2. Disconnect the N40 combination meter assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      N164-13 (ILL-) - N40-39 (ILL-) Always Below 1 Ω
      N164-13 (ILL-) - Body ground Always 10 kΩ or higher

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      N164-14 (ILL+) - Body ground Power switch off, light control switch in tail or head position 11 to 14 V

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR