Data Signal Circuit between Navigation Receiver Assembly and Extension Module [09/2016 - ]: Procedure

1. Disconnect the o3 navigation receiver assembly connector.
2. Disconnect the o4 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
   o4-1 (USV4) - o3-1 (USV4)	Always	Below 1 Ω
   o4-2 (US4-) - o3-2 (US4-)	Always	Below 1 Ω
   o4-3 (US4+) - o3-3 (US4+)	Always	Below 1 Ω
   o4-4 (UGD4) - o3-4 (UGD4)	Always	Below 1 Ω
   o4-5 (USG4) - o3-5 (USG4)	Always	Below 1 Ω
   o4-1 (USV4) or o3-1 (USV4) - Body ground	Always	10 kΩ or higher
   o4-2 (US4-) or o3-2 (US4-) - Body ground	Always	10 kΩ or higher
   o4-3 (US4+) or o3-3 (US4+) - Body ground	Always	10 kΩ or higher
   o4-4 (UGD4) or o3-4 (UGD4) - Body ground	Always	10 kΩ or higher
   o4-5 (USG4) or o3-5 (USG4) - 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 [09/2016 - 05/2019]  , or refer to  PROBLEM SYMPTOMS TABLE [05/2019 - ] 

Result: 

NG 

REPLACE NO. 1 NAVIGATION WIRE. Refer to  REMOVAL [09/2016 - 05/2019]  , or refer to  REMOVAL [05/2019 - 07/2020]  , or refer to  REMOVAL [07/2020 - ]