Vehicle Speed Signal Inspection

1. Disconnect connectors of AV control unit and combination meter.
2. Check continuity between AV control unit harness connector M77 terminal 33 (OR/L) and combination meter harness connector M41 terminal 37 (OR/L).
   Fig 1: Checking Harness Of Vehicle Speed Signal

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. Continuity should exist. 
3. Check continuity between AV control unit harness connector M77 terminal 33 (OR/L) and ground.
   1. Continuity should not exist. 

OK or NG 

1. OK: Go to 2.
2. NG:
   • Check connector housings for disconnected or loose terminals.
   • Repair harness or connector.

1. Connect AV control unit connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit harness connector M77 terminal 33 (OR/L) and ground.
   Fig 2: Vehicle Speed Signal Check 1

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. Approx. 5V 

OK or NG 

1. OK: Go to 3.
2. NG: Replace AV control unit.

1. Connect combination meter connector.
2. Start engine and drive vehicle at more than 40 km/h (25 MPH).
3. Check voltage signal between AV control unit harness connector M77 terminal 33 (OR/L) and ground.
   Fig 3: Vehicle Speed Signal Check 2

   Courtesy of NISSAN MOTOR CO., U.S.A.
   1. 33 (OR/L) - Ground: Refer to  TERMINALS AND REFERENCE VALUE FOR AV CONTROL UNIT  

OK or NG 

1. OK: Replace AV control unit.
2. NG: Check combination meter. Refer to VEHICLE SPEED SIGNAL INSPECTION .