Data Signal Circuit between Navigation Receiver Assembly and Extension Module [06/2015 - 01/2018]: 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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   T4-1 (USV2) - T3-1 (USBV)	Always	Below 1 Ω
   T4-2 (US2-) - T3-2 (USB-)	Always	Below 1 Ω
   T4-3 (US2+) - T3-3 (USB+)	Always	Below 1 Ω
   T4-4 (UGD2) - T3-4 (USBG)	Always	Below 1 Ω
   T4-5 (USG) - T3-5 (USG)	Always	Below 1 Ω
   T4-1 (USV2) - Body ground	Always	10 kΩ or higher
   T4-2 (US2-) - Body ground	Always	10 kΩ or higher
   T4-3 (US2+) - Body ground	Always	10 kΩ or higher
   T4-4 (UGD2) - Body ground	Always	10 kΩ or higher
   T4-5 (USG) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2015 - 01/2018] 

Result: 

NG 

REPLACE NAVIGATION WIRE. Refer to  REMOVAL [06/2015 - 01/2018]