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

1. Disconnect the U6 radio and display receiver assembly connector.
2. Disconnect the U7 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
   U7-1 (USV4) - U6-1 (USV4)	Always	Below 1 Ω
   U7-2 (US4-) - U6-2 (US4-)	Always	Below 1 Ω
   U7-3 (US4+) - U6-3 (US4+)	Always	Below 1 Ω
   U7-4 (UGD4) - U6-4 (UGD4)	Always	Below 1 Ω
   U7-5 (USG4) - U6-5 (USG4)	Always	Below 1 Ω
   U7-1 (USV4) - Body ground	Always	10 kΩ or higher
   U7-2 (US4-) - Body ground	Always	10 kΩ or higher
   U7-3 (US4+) - Body ground	Always	10 kΩ or higher
   U7-4 (UGD4) - Body ground	Always	10 kΩ or higher
   U7-5 (USG4) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of navigation wire connector (to Radio and Display 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 [10/2014 - 10/2015] or PROBLEM SYMPTOMS TABLE [10/2015 - ] )

Result: 

NG 

REPLACE NAVIGATION WIRE 

(Refer to REMOVAL [10/2014 - ] )