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

1. Disconnect the b6 navigation receiver assembly connector.
2. Disconnect the b7 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
   b7-1 (USV4) - b6-1 (USV4)	Always	Below 1 Ω
   b7-2 (US4-) - b6-2 (US4-)	Always	Below 1 Ω
   b7-3 (US4+) - b6-3 (US4+)	Always	Below 1 Ω
   b7-4 (UGD4) - b6-4 (UGD4)	Always	Below 1 Ω
   b7-5 (USG4) - b6-5 (USG4)	Always	Below 1 Ω
   b7-1 (USV4) - Body ground	Always	10 kΩ or higher
   b7-2 (US4-) - Body ground	Always	10 kΩ or higher
   b7-3 (US4+) - Body ground	Always	10 kΩ or higher
   b7-4 (UGD4) - Body ground	Always	10 kΩ or higher
   b7-5 (USG4) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of No. 1 navigation wire connector (to Navigation Receiver Assembly)
   *b	Front view of No. 1 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 [11/2015 - ] )

Result: 

NG 

REPLACE NO. 1 NAVIGATION WIRE 

Refer to REMOVAL [11/2015 - ] )