Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter: Procedure

1. Disconnect the the No. 1 stereo jack adapter assembly connector and radio receiver assembly connector.
   Fig 1: No. 1 Stereo Jack Adapter Assembly Connector And Radio Receiver Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/O USB AUDIO SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   U1-4 (AUXO) - G12-5 (AUXI)	Always	Below 1 Ω
   U1-3 (ASGN) - G12-21 (ASGN)	Always	Below 1 Ω
   U1-2 (ARO) - G12-19 (ARI)	Always	Below 1 Ω
   U1-1 (ALO) - G12-20 (ALI)	Always	Below 1 Ω
   U1-5 (AGND) - G12-6 (AGND)	Always	Below 1 Ω
   U1-4 (AUXO) - Body ground	Always	10 kΩ or higher
   U1-3 (ASGN) - Body ground	Always	10 kΩ or higher
   U1-2 (ARO) - Body ground	Always	10 kΩ or higher
   U1-1 (ALO) - Body ground	Always	10 kΩ or higher
   U1-5 (AGND) - Body ground	Always	10 kΩ or higher

   W/ USB AUDIO SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   U11-9 (AUXO) - G12-5 (AUXI)	Always	Below 1 Ω
   U11-8 (ASGN) - G12-21 (ASGN)	Always	Below 1 Ω
   U11-6 (ARO) - G12-19 (ARI)	Always	Below 1 Ω
   U11-7 (ALO) - G12-20 (ALI)	Always	Below 1 Ω
   U11-10 (AGND) - G12-6 (AGND)	Always	Below 1 Ω
   U11-9 (AUXO) - Body ground	Always	10 kΩ or higher
   U11-8 (ASGN) - Body ground	Always	10 kΩ or higher
   U11-6 (ARO) - Body ground	Always	10 kΩ or higher
   U11-7 (ALO) - Body ground	Always	10 kΩ or higher
   U11-10 (AGND) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *A	w/o USB Audio System
   *B	w/ USB Audio System
   *1	Front view of wire harness connector (to Radio Receiver Assembly)
   *2	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)
   *3	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2