Vehicle Speed Signal Check for NAVI Control Unit

Does speed meter is operated normally?

Yes or No

1. Yes: GO TO 2.
2. NO: Check combination meter trouble diagnosis. Refer to COMBINATION METERS .

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).

   Continuity should exist. 

4. Check continuity between NAVI control unit harness connector B207 terminal 28 (GY) and ground.

   Continuity should not exist. 

   Fig 1: Checking 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)

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

OK or NG

1. OK: GO TO 3.
2. NG: Repair harness or connector.

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.

   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 With CONSULT-II Or Oscilloscope

   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 .