Data Signal Circuit between Radio Receiver and Stereo Jack Adapter [04/2013 - 09/2020]: Procedure

1. Disconnect the K120 radio receiver assembly connector.
2. Disconnect the K121 No. 1 stereo jack adapter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *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)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K120-2 (US1-) - K121-2 (US1-)	Always	Below 1 Ω
   K120-3 (US1+) - K121-3 (US1+)	Always	Below 1 Ω
   K120-5 (USG1) - K121-5 (USG1)	Always	Below 1 Ω
   K120-2 (US1-) - Body ground	Always	10 kΩ or higher
   K120-3 (US1+) - Body ground	Always	10 kΩ or higher
   K120-5 (USG1) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [04/2013 - 06/2014]  , or refer to  PROBLEM SYMPTOMS TABLE [06/2014 - 10/2016]  , or refer to  PROBLEM SYMPTOMS TABLE [10/2016 - 09/2020] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR