Navigation Receiver Assembly Power Source Circuit [09/2014 - 11/2017]: Procedure

1. Disconnect the O57 radio receiver assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O57-12 (GND1) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   O57-17 (+B1) - O57-12 (GND1)	Always	11 to 14 V
   O57-16 (ACC1) - O57-12 (GND1)	Engine switch on (ACC)	11 to 14 V
   O57-15 (IG) - O57-12 (GND1)	Engine switch on (IG)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2014 - 11/2017] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR