Data Signal Circuit between Navigation Receiver Assembly and Extension Module [10/2014 - ]: Procedure

1. Remove the navigation wire (Refer to REMOVAL [10/2014 - ] ).
2. 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
   R2-1 (USV4) - R1-1 (USV4)	Always	Below 1 Ω
   R2-2 (US4-) - R1-2 (US4-)	Always	Below 1 Ω
   R2-3 (US4+) - R1-3 (US4+)	Always	Below 1 Ω
   R2-4 (UGD4) - R1-4 (UGD4)	Always	Below 1 Ω
   R2-5 (USG4) - R1-5 (USG4)	Always	Below 1 Ω
   R2-1 (USV4) - Body ground	Always	10 kΩ or higher
   R2-2 (US4-) - Body ground	Always	10 kΩ or higher
   R2-3 (US4+) - Body ground	Always	10 kΩ or higher
   R2-4 (UGD4) - Body ground	Always	10 kΩ or higher
   R2-5 (USG4) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of navigation wire connector (to Navigation ECU Sub-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 [10/2014 - 10/2015] or PROBLEM SYMPTOMS TABLE [10/2015 - ] )

Result: 

NG 

REPLACE NAVIGATION WIRE 

(Refer to REMOVAL [10/2014 - ] )