Data Signal Circuit between Navigation Receiver Assembly and Extension Module [12/2015 - 11/2017]: Procedure

1. Disconnect the navigation receiver assembly connector.
2. Disconnect the stereo component tuner assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   V4-1 (USV4) - V3-1 (USV4)	Always	Below 1 Ω
   V4-2 (US4-) - V3-2 (US4-)	Always	Below 1 Ω
   V4-3 (US4+) - V3-3 (US4+)	Always	Below 1 Ω
   V4-4 (USO4) - V3-4 (USO4)	Always	Below 1 Ω
   V4-5 (USG4) - V3-5 (USG4)	Always	Below 1 Ω
   V4-1 (USV4) - Body ground	Always	10 kΩ or higher
   V4-2 (US4-) - Body ground	Always	10 kΩ or higher
   V4-3 (US4+) - Body ground	Always	10 kΩ or higher
   V4-4 (USO4) - Body ground	Always	10 kΩ or higher
   V4-5 (USG4) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of navigation wire connector (to Navigation Receiver Assembly)
   *b	Front view of navigation wire connector (to Stereo Component Tuner Assembly)

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [12/2015 - 08/2016] Refer to PROBLEM SYMPTOMS TABLE [08/2016 - 11/2017] )

Result: 

NG 

REPLACE NAVIGATION WIRE 

(Refer to REMOVAL [12/2015 - 11/2017] )