Sound Signal Circuit between Headphone Terminal and Television Display [08/2019 - ]: Procedure

1. Check the malfunctioning headphones.

   Result

   Result	Proceed to
   Malfunction in headphone terminal RH side	A
   Malfunction in headphone terminal LH side	B

Result: 

B 

See step  4

Result: 

A 

See step  2

1. Disconnect the U13 television display assembly connector.
2. Disconnect the S7 headphone terminal RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U13-26 (HP2R) - S7-1 (HP2R)	Always	Below 1 Ω
   U13-28 (HP2L) - S7-2 (HP2L)	Always	Below 1 Ω
   U13-27 (SLD6) - S7-3 (SG8)	Always	Below 1 Ω
   U13-26 (HP2R) - Body ground	Always	10 kΩ or higher
   U13-28 (HP2L) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the television display assembly connector still connected.

   Refer to REMOVAL [08/2019 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Television Display Assembly)

2. Using an oscilloscope, check the waveform between each terminal and the body ground according to the conditions as shown in the table below.

   Standard

   Tester Connection	Condition	Specified Condition
   U13-26 (HP2R) - Body ground	Audio sound being produced	A waveform synchronized with sound is output
   U13-28 (HP2L) - Body ground

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the U13 television display assembly connector.
2. Disconnect the S8 headphone terminal LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U13-12 (HP1R) - S8-1 (HP1R)	Always	Below 1 Ω
   U13-14 (HP1L) - S8-2 (HP1L)	Always	Below 1 Ω
   U13-13 (SLD5) - S8-3 (SG7)	Always	Below 1 Ω
   U13-12 (HP1R) - Body ground	Always	10 kΩ or higher
   U13-14 (HP1L) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Remove the television display assembly connector still connected.

   Refer to REMOVAL [08/2019 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Television Display Assembly)

2. Using an oscilloscope, check the waveform between each terminal and the body ground according to the conditions as shown in the table below.

   Standard

   Tester Connection	Condition	Specified Condition
   U13-12 (HP1R) - Body ground	Audio sound being produced	A waveform synchronized with sound is output
   U13-14 (HP1L) - Body ground

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR