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

CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display unit connector M93 and display control unit connector M95.
3. Check continuity between display control unit and display unit.
  
  Fig 1: Connector Terminals Continuity Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between display control unit and ground.
  
  Fig 2: Checking Continuity Between Display Control Unit & Display Unit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Connector Terminals Continuity Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 2.
- NG: Repair harness or connector.
CHECK 1: COMMUNICATION SIGNAL (DCU-DSP)
1. Connect display control unit connector.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector M95 terminal 36 (B/W) and ground.
  Approx. 3.5 V or more
OK or NG
- OK: GO TO 3.
- NG: Replace display control unit. Refer to REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT .
  
  Fig 4: Checking Voltage Between Display Control Unit Harness Connector Terminal & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK 2: COMMUNICATION SIGNAL (DSP-DCU)
1. Connect display unit connector.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector M95 terminal 38 (L) and ground.
  Approx. 3.5 V or more
OK or NG
- OK: GO TO 4.
- NG: Replace display unit. Refer to REMOVAL AND INSTALLATION OF DISPLAY UNIT .
  
  Fig 5: Checking Voltage Between Display Control Unit Harness Connector Terminal & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK 3: COMMUNICATION SIGNAL (DCU-DSP)
1. Turn ignition switch ON.
2. Check signal between display control unit harness connector M95 terminal 36 (B/W) and ground with CONSULT-II or oscilloscope.
  36 (B/W) - Ground: Refer to TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT .
OK or NG
- OK: GO TO 5.
- NG: Replace display unit. Refer to REMOVAL AND INSTALLATION OF DISPLAY UNIT .
  
  Fig 6: Checking Signal Between Display Control Unit Harness Connector Terminal & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK 4: COMMUNICATION SIGNAL (DSP-DCU)
1. Turn ignition switch ON.
2. Check signal between display control unit harness connector M95 terminal 38 (L) and ground with CONSULT-II or oscilloscope.
  38 (L) - Ground: Refer to TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT .
OK or NG
- OK: Replace display unit. Refer to REMOVAL AND INSTALLATION OF DISPLAY UNIT .
- NG: Replace display control unit. Refer to REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT .
  
  Fig 7: Checking Signal Between Display Control Unit Harness Connector Terminal & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.