AUDIO AND VISUAL SYSTEM(except 8 Speakers) Display does not Dim when Light Control Switch is Turned ON

DESCRIPTION

If the audio and visual system is turned on with the light control switch in the tail or head position, before AVC-LAN communication is established, the multi-display assembly dims according to the illumination signal received via a direct line.

After AVC-LAN communication is established, the multi-display assembly dims the display according to a dimmer signal sent via AVC-LAN communication.

The radio receiver assembly changes the multi-display assembly between daytime mode and night mode according to the illumination signal input.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   CHECK SYMPTOMS

   
   

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

      Result

      Result Proceed to There is a delay in when the multi-display assembly dims after the audio and visual system is turned on with the light control switch in the tail or head position. A The multi-display assembly dims for a moment and then becomes bright after the audio and visual system is turned on with the light control switch in the tail or head position. B When the light control switch is in the tail or head position, the multi-display assembly dims but does not change to night mode. When the light control switch is in the tail or head position, the multi-display assembly neither dims nor switches to night mode. C

      Tip:
      

      • 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 multi-display assembly dims the display according to the illumination signal received via a direct line.

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

      • The radio receiver assembly changes the multi-display assembly between daytime mode and night mode according to the illumination signal input.

   
   
   • AClick here
   • BClick here
   • C

     GO TO LIGHTING SYSTEMClick here

2. Click here

   CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

   
   

   1. Disconnect the H93 multi-display assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H93-13 (GND1) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition H93-2 (ILL) - H93-13 (GND1) Power switch off Light control switch in tail or head position 11 to 14 V

      Result
      Proceed to OK NG

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

3. Click here

   CHECK IMAGE QUALITY SETTING

   
   

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

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

      Result
      Result Proceed to Daytime mode is set to on. A Daytime mode is set to off. B

   
   
   • A

     CHANGE DAYTIME MODE SETTING TO OFF

   • BClick here
4. Click here

   CHECK VEHICLE SIGNAL (OPERATION CHECK)

   
   
   1. 

      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

      Tip:

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

      Result
      Proceed to OK NG

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

   • NGClick here
5. Click here

   CHECK HARNESS AND CONNECTOR (ILLUMINATION SIGNAL)

   
   

   1. Disconnect the H97 radio receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H97-12 (GND1) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition H97-14 (ILL+) - H97-12 (GND1) Power switch off Light control switch in tail or head position 11 to 14 V

      Result
      Proceed to OK NG

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR