Vehicle Speed Signal Check for NAVI Control Unit

1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector B152, combination meter connector M24 and display control unit connector M94.
3. Check continuity between NAVI control unit harness connector B152 terminal 28 (W/R) and combination meter harness connector M24 terminal 29 (W/R).
   • Continuity should exist. 
4. Check continuity between NAVI control unit harness connector B152 terminal 28 (W/R) and ground.
   • Continuity should not exist. 
   Fig 1: Checking Continuity Between NAVI Control Unit Harness Connector B152 Terminal 28 And Combination Meter Harness Connector M24 Terminal 29

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

OK or NG

• OK: GO TO 2.
• NG: Repair harness.

1. Connect NAVI control unit connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector B152 terminal 28 (W/R) and ground.
   • Approx. 3.5V or more 

OK or NG

• OK: GO TO 3.
• NG: Replace NAVI control unit. Refer to "REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT  ".

Fig 2: Checking Voltage Between NAVI Control Unit Harness Connector B152 Terminal 28 (W/R) And Ground

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

1. Connect combination meter connector and display control unit connector.
2. Drive vehicle at a constant speed.
3. Check signal between NAVI control unit harness connector B152 terminal 28 (W/R) and ground with CONSULT-II or oscilloscope.
   • 28 (W/R) - Ground: Refer to "TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT  ".

OK or NG

• OK: Replace NAVI control unit. Refer to "REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT  ".
• NG: Check combination meter system. Refer to "VEHICLE SPEED SIGNAL INSPECTION ".

Fig 3: Checking Signal Between NAVI Control Unit Harness Connector B152 Terminal 28 And Ground With CONSULT-II Or Oscilloscope

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