Vehicle Speed Signal Check for NAVI Control Unit

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

VEHICLE SPEED OPERATION CHECK
Is speedometer operated normally?

YES or NO
1. YES : GO TO 2.
2. NO : Check combination meter trouble diagnosis. Refer to "TROUBLE DIAGNOSIS ".
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 B207 terminal 28 (GY) and unified meter and A/C amp. harness connector M56 terminal 26 (R/G).
  1. Continuity should exist.
4. Check continuity between NAVI control unit harness connector B207 terminal 28 (GY) and ground.
  1. Continuity should not exist.
OK or NG
1. OK : GO TO 3.
2. NG : Repair harness or connector.
Fig 1: Checking Continuity Between NAVI Control Unit Harness Connector B207 Terminal 28 (GY) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK VEHICLE SPEED SIGNAL
1. Connect NAVI control unit connector and unified meter and A/C amp. connector.
2. Start engine.
3. Drive vehicle at a constant speed.
4. Check signal between NAVI control unit harness connector B207 terminal 28 (GY) and ground with CONSULT-II or oscilloscope.
  1. 28 (GY) - Ground : Refer to " TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT ".
Fig 2: Checking Signal Between NAVI Control Unit Harness Connector B207 Terminal 28 (GY) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : Replace NAVI control unit.
2. NG : Check combination meter system. Refer to "VEHICLE SPEED SIGNAL INSPECTION ".