Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter [10/2014 - ]: Procedure

1. Disconnect the I8 navigation ECU sub-assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the I146 No. 1 stereo jack adapter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I8-25 (ADPG) - I146-9 (AUXO)	Always	Below 1 Ω
   I8-26 (VAR+) - I146-6 (ARO)	Always	Below 1 Ω
   I8-28 (VAL+) - I146-7 (ALO)	Always	Below 1 Ω
   I8-27 (VA-) - I146-8 (ASGN)	Always	Below 1 Ω
   I8-11 (AGND) - I146-10 (AGND)	Always	Below 1 Ω
   I8-25 (ADPG) - Body ground	Always	10 kΩ or higher
   I8-26 (VAR+) - Body ground	Always	10 kΩ or higher
   I8-28 (VAL+) - Body ground	Always	10 kΩ or higher
   I8-27 (VA-) - Body ground	Always	10 kΩ or higher
   I8-11 (AGND) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Navigation ECU Sub-assembly)
   *b	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [10/2014 - 10/2015] or PROBLEM SYMPTOMS TABLE [10/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR