Audio Communication Line Check (Between Display Control Unit and Audio Unit)

Check system of power supply and ground circuit audio unit. Refer to "POWER SUPPLY CIRCUIT INSPECTION "

OK or NG 

• OK: GO TO 2.
• NG: Check the malfunctioning parts.

1. Turn ignition switch OFF.
2. Disconnect audio unit connector and display control unit connector.
3. Check continuity between audio unit and display control unit.
   Fig 1: Connector Terminal Wire Color Specification

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: Checking Continuity Between Audio Unit And Display Control Unit

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between display control unit and ground.
   Fig 3: Connector Terminal Continuity Chart

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

OK or NG 

• OK: GO TO 3.
• NG: Repair harness or connector.

1. Connect display control unit connector.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector M95 terminal 42 (BR) and ground.

   Approx. 3.5V or more. 

OK or NG 

• OK: GO TO 4.
• NG: Replace display control unit. Refer to "REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT ".
  Fig 4: Checking Voltage Between Display Control Unit Harness Connector M95 Terminal 42 (Br) And Ground

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

1. Turn ignition switch OFF.
2. Disconnect display control unit connector.
3. Connect audio unit connector.
4. Turn ignition switch ON.
5. Check voltage between audio unit harness connector M45 terminal 65 (B/R) and ground.

   Approx. 3.5V or more. 

OK or NG 

• OK: GO TO 5.
• NG: Replace audio unit. Refer to "REMOVAL AND INSTALLATION FOR AUDIO UNIT ".
  Fig 5: Checking Voltage Between Audio Unit Harness Connector M45 Terminal 65 (B/R) And Ground

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

1. Turn ignition switch OFF.
2. Connect display control unit connector.
3. Turn ignition switch ON.
4. Check signal between display control unit harness connector M95 terminal 40 (B/R) and ground with CONSULT-II or oscilloscope.

   40 (B/R) - Ground: Refer to " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT  ". 

OK or NG 

• OK: GO TO 6.
• NG: Replace display control unit. Refer to "REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT ".
  Fig 6: Checking Signal Between Display Control Unit Harness Connector M95 Terminal 40 (B/R) And Ground

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

1. Turn ignition switch ON.
2. Check signal between display control unit harness connector M95 terminal 42 (BR) and ground with CONSULT-II or oscilloscope.

   42 (BR) - Ground: Refer to " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT  ". 

YES or NO

• OK: Inspection End.
• NG: Replace audio unit. Refer to "REMOVAL AND INSTALLATION FOR AUDIO UNIT ".
  Fig 7: Checking Audio-Rx Communication Signal

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