Data Signal Circuit between Navigation Receiver Assembly and Extension Module [08/2014 - ]: Procedure

1. Disconnect the s1 and t1 navigation receiver assembly connectors.
2. Disconnect the s2 and t2 stereo component tuner assembly connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   s1-1 (USV4) - s2-1 (USV4)	Always	Below 1 Ω
   s1-2 (US4-) - s2-2 (US4-)	Always	Below 1 Ω
   s1-3 (US4+) - s2-3 (US4+)	Always	Below 1 Ω
   s1-4 (UGD4) - s2-4 (UGD4)	Always	Below 1 Ω
   s1-5 (USG4) - s2-5 (USG4)	Always	Below 1 Ω
   t1-4 (+B2) - t2-4 (+B2)	Always	Below 1 Ω
   t1-3 (ACC2) - t2-3 (ACC2)	Always	Below 1 Ω
   t1-8 (GND2) - t2-8 (GND2)	Always	Below 1 Ω
   s1-1 (USV4) - Body ground	Always	10 kΩ or higher
   s1-2 (US4-) - Body ground	Always	10 kΩ or higher
   s1-3 (US4+) - Body ground	Always	10 kΩ or higher
   s1-4 (UGD4) - Body ground	Always	10 kΩ or higher
   s1-5 (USG4) - Body ground	Always	10 kΩ or higher
   t1-4 (+B2) - Body ground	Always	10 kΩ or higher
   t1-3 (ACC2) - Body ground	Always	10 kΩ or higher
   t1-8 (GND2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Replace the No. 1 navigation wire. Refer to REMOVAL [08/2014 - ] .
2. Check that the malfunction disappears.

   OK

   Malfunction disappears.

NG → See step   3 

OK → END (NO. 1 NAVIGATION WIRE IS DEFECTIVE)