Sound Signal Circuit between Multi-media Interface ECU and Stereo Jack Adapter: Procedure

1. Disconnect the multi-media interface ECU assembly connector and No. 1 stereo jack adapter assembly connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying H121 And H120 Connectoer Terminals Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H120-3 (UDO+) - H121-2 (UDI+)	Always	Below 1 Ω
   H120-2 (UDO-) - H121-3 (UDI-)	Always	Below 1 Ω
   H120-5 (UJSS) - H121-5 (UESS)	Always	Below 1 Ω
   H120-3 (UDO+) - Body ground	Always	10 kΩ or higher
   H120-2 (UDO-) - Body ground	Always	10 kΩ or higher
   H120-5 (UJSS) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Multi-media Interface ECU 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