Mute Signal Circuit Between Navigation Receiver Assembly And Multi-Media Interface ECU: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Checking 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
   
   

   *1	Component with harness connected (Navigation Receiver Assembly)

NG → See step   2 

OK → See step   3 

1. Disconnect the D59 navigation receiver assembly connector.
2. Disconnect the D66 multi-media interface ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D59-6 (MUTE) - D66-6 (MUT1)	Always	Below 1 Ω
   D59-6 (MUTE) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4