Navigation Receiver Assembly Power Source Circuit (FROM 12/2010): Procedure

1. Disconnect the E52 navigation receiver assembly connector.
2. Disconnect the E39 navigation receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E52-20 (GND) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E52-1 (B) - E52-20 (GND)	Always	11 to 14 V
   E52-11 (ACC) - E52-20 (GND)	Ignition switch ACC	11 to 14 V
   E39-2 (IG) - E52-20 (GND)	Ignition switch ON	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2