Mute Signal Circuit between Navigation Receiver Assembly and Television Display Assembly [08/2015 - 08/2017]: Procedure

1. Remove the television display assembly connector still connected (Refer to REMOVAL [08/2015 - 08/2019] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   U13-6 (MUT1) - Body ground	Television display playing	Above 3.5 V
   	Television display changing modes	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Television Display Assembly)

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )

Result: 

NG 

See step  2

1. Disconnect the I25 navigation receiver assembly connector.
2. Disconnect the U13 television display assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I25-8 (MUTE) - U13-6 (MUT1)	Always	Below 1 Ω
   I25-8 (MUTE) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Temporarily replace the television display assembly with a new or known good one (Refer to REMOVAL [08/2015 - 08/2017] )
2. Check that the mute signal circuit functioning normally.

   OK

   The mute signal circuit functioning normally.

Result: 

OK 

END (TELEVISION DISPLAY ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

REPLACE NAVIGATION RECEIVER ASSEMBLY 

(Refer to REMOVAL [08/2015 - 08/2019] )