Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter [11/2015 - ]: Procedure

1. Disconnect the G78 navigation receiver assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the G44 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
   G78-25 (ADPG) - G44-9 (AUXO)	Always	Below 1 Ω
   G78-26 (VAR+) - G44-6 (ARO)	Always	Below 1 Ω
   G78-28 (VAL+) - G44-7 (ALO)	Always	Below 1 Ω
   G78-27 (VA-) - G44-8 (ASGN)	Always	Below 1 Ω
   G78-11 (AGND) - G44-10 (AGND)	Always	Below 1 Ω
   G78-25 (ADPG) - Body ground	Always	10 kΩ or higher
   G78-26 (VAR+) - Body ground	Always	10 kΩ or higher
   G78-28 (VAL+) - Body ground	Always	10 kΩ or higher
   G78-27 (VA-) - Body ground	Always	10 kΩ or higher
   G78-11 (AGND) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Navigation Receiver 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 [11/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR