Data Signal Circuit between Navigation Receiver Assembly and Extension Module [08/2015 - 08/2019]: Procedure

1. Disconnect the f1 and e1 navigation receiver assembly connectors.
2. Disconnect the f2 and e3 stereo component tuner assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   f1-1 (USV4) - f2-1 (USV4)	Always	Below 1 Ω
   f1-2 (US4-) - f2-2 (US4-)	Always	Below 1 Ω
   f1-3 (US4+) - f2-3 (US4+)	Always	Below 1 Ω
   f1-4 (UGD4) - f2-4 (UGD4)	Always	Below 1 Ω
   f1-5 (USG4) - f2-5 (USG4)	Always	Below 1 Ω
   e1-4 (+B2) - e3-4 (+B2)	Always	Below 1 Ω
   e1-3 (ACC2) - e3-3 (ACC2)	Always	Below 1 Ω
   e1-8 (GND2) - e3-8 (GND2)	Always	Below 1 Ω
   f1-1 (USV4) - Body ground	Always	10 kΩ or higher
   f1-2 (US4-) - Body ground	Always	10 kΩ or higher
   f1-3 (US4+) - Body ground	Always	10 kΩ or higher
   f1-4 (UGD4) - Body ground	Always	10 kΩ or higher
   f1-5 (USG4) - Body ground	Always	10 kΩ or higher
   e1-4 (+B2) - Body ground	Always	10 kΩ or higher
   e1-3 (ACC2) - Body ground	Always	10 kΩ or higher
   e1-8 (GND2) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Replace the No. 1 navigation wire with a known good one (Refer to REMOVAL [08/2015 - 08/2019] ).
2. Check that the malfunction disappears.

   OK

   Malfunction disappears.

Result: 

OK 

END (NO. 1 NAVIGATION WIRE IS DEFECTIVE) 

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2017] , or refer to PROBLEM SYMPTOMS TABLE [08/2017 - 08/2019] )