Sound Signal Circuit between Video Terminal and Television Display: Procedure

1. Disconnect the television display assembly connector.
   Fig 1: Checking Harness And Connector (Television Display Assembly - Video Terminal)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the video terminal connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   Q13-7 (AUXR) - O25-1 (VAR+)	Always	Below 1 Ω
   Q13-8 (AUXL) - O25-2 (VAL+)	Always	Below 1 Ω
   Q13-23 (SG7) - O25-3 (VA-)	Always	Below 1 Ω
   Q13-24 (OPEN) - O25-8 (ADPG)	Always	Below 1 Ω
   Q13-7 (AUXR) - Body ground	Always	10 kΩ or higher
   Q13-8 (AUXL) - Body ground	Always	10 kΩ or higher
   Q13-23 (SG7) - Body ground	Always	10 kΩ or higher
   Q13-24 (OPEN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions shown in the table below.
   Fig 2: Checking Video Terminal Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard conditions

   Tester Connection	Condition	Specified Condition
   O25-1 (VAR+) - Body ground	External device system is playing, sound is being produced	Waveform synchronized with sound is output
   O25-2 (VAL+) - Body ground	External device system is playing, sound is being produced	Waveform synchronized with sound is output

NG → See step   4 

OK → See step   3