Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter: Procedure

1. Disconnect the L41 navigation receiver assembly connector.
2. Disconnect the z20 No. 1 stereo jack adapter assembly connector (w/ USB Audio System).
   Fig 1: Identifying Z20 No. 1 Stereo Jack Adapter Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the z19 No. 1 stereo jack adapter assembly connector (w/o USB Audio System).
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/ USB AUDIO SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   L41-19 (AUXI) - z20-9 (AUXO)	Always	Below 1 Ω
   L41-16 (ASGN) - z20-8 (ASGN)	Always	Below 1 Ω
   L41-15 (ARI) - z20-6 (ARO)	Always	Below 1 Ω
   L41-17 (ALI) - z20-7 (ALO)	Always	Below 1 Ω
   L41-18 (AGND) - z20-10 (AGND)	Always	Below 1 Ω
   L41-19 (AUXI) - Body ground	Always	10 kΩ or higher
   L41-16 (ASGN) - Body ground	Always	10 kΩ or higher
   L41-15 (ARI) - Body ground	Always	10 kΩ or higher
   L41-17 (ALI) - Body ground	Always	10 kΩ or higher
   L41-18 (AGND) - Body ground	Always	10 kΩ or higher

   W/O USB AUDIO SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   L41-19 (AUXI) - z19-4 (AUXO)	Always	Below 1 Ω
   L41-16 (ASGN) - z19-3 (ASGN)	Always	Below 1 Ω
   L41-15 (ARI) - z19-2 (ARO)	Always	Below 1 Ω
   L41-17 (ALI) - z19-1 (ALO)	Always	Below 1 Ω
   L41-18 (AGND) - z19-5 (AGND)	Always	Below 1 Ω
   L41-19 (AUXI) - Body ground	Always	10 kΩ or higher
   L41-16 (ASGN) - Body ground	Always	10 kΩ or higher
   L41-15 (ARI) - Body ground	Always	10 kΩ or higher
   L41-17 (ALI) - Body ground	Always	10 kΩ or higher
   L41-18 (AGND) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2