Mute Signal Circuit Between Navigation Receiver Assembly And Stereo Component Tuner Assembly: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Measuring Voltage Of Navigation Receiver Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   D59-6 (MUTE) - Body ground	Ignition switch ACC, Satellite radio playing → Changing source	Above 3.5 V → Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Navigation Receiver Assembly)

NG → See step   2 

OK → See step   3 

1. Disconnect the L20 stereo component tuner assembly connector.
2. Disconnect the D59 navigation receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   D59-6 (MUTE) - L20-6 (MUTE)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D59-6 (MUTE) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4