Mute Signal Circuit between Stereo Component Tuner Assembly and Television Display Assembly: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Inspecting Television Display Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Q13-26 (LMUT) - Body ground	Ignition switch ACC, RSE system playing → Changing modes	Above 3.5 V → Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Television Display Assembly)

NG → See step   2 

OK → See step   4 

1. Disconnect the E29 stereo component tuner assembly connector.
2. Disconnect the Q13 television display assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E29-15 (MUT2) - Q13-26 (LMUT)	Always	Below 1 Ω
   E29-15 (MUT2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the television display assembly and check if it operates normally, refer to REMOVAL .

   OK

   The navigation system operates normally.

NG → See step   5 

OK → END (TELEVISION DISPLAY ASSEMBLY IS DEFECTIVE)