Vehicle Speed Signal Check for NAVI Control Unit

CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector and unified meter and A/C amp. connector.
3. Check continuity between NAVI control unit harness connector M97 terminal 28 (BR) and unified meter and A/C amp. harness connector M50 terminal 26 (G).
  1. Continuity should exist .
4. Check continuity between NAVI control unit harness connector M97 terminal 28 (BR) and ground.
  1. Continuity' should net exist .
OK or NG
1. OK: GO TO 2.
2. NG: Repair harness.
Fig 1: Checking Continuity Between NAVI Control Unit Harness Connector Terminal & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK 1: VEHICLE SPEED SIGNAL
1. Connect NAVI control unit connector and unified meter and A/C amp. connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector M97 terminal 28 (BR) and ground.
  1. Approx. 3.5V or more
OK or NG
1. OK: GO TO 3.
2. NG: Replace NAVI control unit. Refer to "REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT ".
Fig 2: Checking Voltage Between NAVI Control Unit Harness Connector Terminal & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK 2: VEHICLE SPEED SIGNAL
1. Drive vehicle at a constant speed.
2. Check signal between NAVI control unit harness connector M97 terminal 28 (BR) and ground with CONSULT-II or oscilloscope.
  1. 28 (BR) - Ground: Refer to "TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT ".
OK or NG
1. OK: Replace NAVI control unit. Refer to "REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT ".
2. NG: Check combination meter system. Refer to ENGINE SPEED SIGNAL INSPECTION .
Fig 3: Checking Signal Between NAVI Control Unit Harness Connector Terminal & Ground With CONSULT-II Or Oscilloscope
Courtesy of NISSAN MOTOR CO., U.S.A.