Power Supply and Ground Circuit Check for NAVI Control Unit

• Check that the following fuses of the NAVI control unit are not blown.
  TERMINAL
  
  

  Terminals		Power source	Fuse No.
  Connector	Terminal (wire color)
  M57	2 (Y)	Battery power	37
  	3 (Y)
  	6 (LG)	Ignition switch ACC or ON	6
  M58	27 (Y/G)	Ignition switch ON or START	12

OK or NG

1. OK: GO TO 2.
2. NG: If fuse is blown, be sure to eliminate case of malfunction before installing new fuse. Refer to POWER SUPPLY ROUTING CIRCUIT .

1. Check voltage between the following harness connector terminals and ground.
   TERMINAL
   
   

   Terminals			OFF	ACC	ON
   (+)		(-)
   Connector	Terminal (wire color)
   M57	2 (Y)	Ground	Battery voltage	Battery voltage	Battery voltage
   	3 (Y)		Battery voltage	Battery voltage	Battery voltage
   	6 (LG)		0V	Battery voltage	Battery voltage
   M58	27 (Y/G)		0V	0V	Battery voltage

   Fig 1: Checking Voltage Between Harness Connector Terminals And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

1. OK: GO TO 3.
2. NG: Check harness for open or short between NAVI control unit and fuse.

1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector.
3. Check continuity between the following NAVI control unit and ground.
   TERMINAL
   
   

   Terminals			Continuity
   Connector	Terminal (Wire color)	Ground	Yes
   M57	1 (B)
   	4 (B)

   Fig 2: Checking Continuity Between NAVI Control Unit And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

1. OK: Inspection end.
2. NG: Repair or replace harness.