Power Supply and Ground Circuit Check for Display Unit and NAVI Switch

Check that the following fuses of the display unit and NAVI switch are not blown.

Fig 1: Fuse Terminals Unit Table

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

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 display unit harness connector and ground.
   Fig 2: Terminals Voltage Specification Table (Unit Harness Connector And Ground)

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   Fig 3: Checking Continuity Between NAVI Control Unit Harness Connector And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check voltage between NAVI switch harness connector and ground.
   Fig 4: Terminals Voltage Specification Table (NAVI Switch Harness Connector And Ground)

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 5: Checking Voltage Between NAVI Switch Harness Connector And Ground

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OK or NG 

1. OK: GO TO 3.
2. NG: Check the following.
   • Harness for open or short between display unit and fuse.
   • Harness for open or short between NAVI switch and fuse.

1. Turn ignition switch OFF.
2. Disconnect display unit connector and NAVI switch connector.
3. Check continuity between display unit harness connector and ground.
   Fig 6: Terminals Continuity Specification Table

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 7: Checking Continuity Between Display Unit Harness Connector And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between NAVI switch harness connector M37 terminal 7 (B) and ground.
   1. Continuity should exist. 

OK or NG 

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

Fig 8: Checking Continuity Between NAVI Switch Harness Connector M37 Terminal 7 (B) And Ground

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