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

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

   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
   E38-4 (AUXO) - E32-19 (AUXI)	Always	Below 1 Ω
   E38-3 (ASGN) - E32-16 (ASGN)	Always	Below 1 Ω
   E38-2 (ARO) - E32-15 (ARI)	Always	Below 1 Ω
   E38-1 (ALO) - E32-17 (ALI)	Always	Below 1 Ω
   E38-5 (AGND) - E32-18 (AGND)	Always	Below 1 Ω
   E38-4 (AUXO) - Body ground	Always	10 kΩ or higher
   E38-3 (ASGN) - Body ground	Always	10 kΩ or higher
   E38-2 (ARO) - Body ground	Always	10 kΩ or higher
   E38-1 (ALO) - Body ground	Always	10 kΩ or higher
   E38-5 (AGND) - Body ground	Always	10 kΩ or higher

   W/ USB AUDIO SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   E80-9 (AUXO) - E32-19 (AUXI)	Always	Below 1 Ω
   E80-8 (ASGN) - E32-16 (ASGN)	Always	Below 1 Ω
   E80-6 (ARO) - E32-15 (ARI)	Always	Below 1 Ω
   E80-7 (ALO) - E32-17 (ALI)	Always	Below 1 Ω
   E80-10 (AGND) - E32-18 (AGND)	Always	Below 1 Ω
   E80-9 (AUXO) - Body ground	Always	10 kΩ or higher
   E80-8 (ASGN) - Body ground	Always	10 kΩ or higher
   E80-6 (ARO) - Body ground	Always	10 kΩ or higher
   E80-7 (ALO) - Body ground	Always	10 kΩ or higher
   E80-10 (AGND) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2