Audio Communication Line Check

1. CHECK HARNESS 
   1. Turn ignition switch OFF.
   2. Disconnect audio unit connector and display unit connector.
   3. Check continuity between audio unit and display unit.
      CHECK CONTINUITY
      
      

      Terminals				Continuity
      Display unit		Audio unit
      Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
      M93	8 (B/R)	M45	66 (B/R)	Yes
      	10(W/R)		65 (W/R)
      	9		67

   4. Check continuity between display unit and ground.
   CHECK CONTINUITY
   
   

   Terminals			Continuity
   Display unit		Ground
   Connector	Terminal (Wire color)
   M93	8 (B/R)		No
   	10 (W/R)

   OK or NG 

   1. OK: GO TO 2.
   2. NG: Repair harness.
      Fig 1: Checking Continuity Between Display Unit And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.
2. CHECK AUDIO TX COMMUNICATION SIGNAL 
   1. Connect display unit connector.
   2. Turn ignition switch ON.
   3. Check voltage between display unit harness connector M93 terminal 8 (B/R) and ground.
   1. Voltage: Approx. 3.5V 

   OK or NG 

   1. OK: GO TO 3.
   2. NG: Replace display unit. Refer to "Removal And Installation Of Display Unit  ".
      Fig 2: Checking Voltage Between Display Unit Harness Connector M93 Terminal 8

      Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check Audio RX Communication Signal 
   1. Connect audio unit connector.
   2. Turn ignition switch ON.
   3. Check voltage between audio unit harness connector M45 terminal 65 (B/R) and ground.
   1. Voltage: Approx. 3.5V 

   OK or NG

   1. OK: GO TO 4.
   2. NG: Replace audio unit. Refer to "REMOVAL AND INSTALLATION FOR AUDIO UNIT ".
      Fig 3: Checking Voltage Between Audio Unit Harness Connector M45 Terminal 65 (B/R) And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check Audio TX Communication Signal 
   1. Turn ignition switch ON.
   2. Check the signal between audio unit harness connector M45 terminal 66 (W/R) and ground with CONSULT-II or oscilloscope.
   1. Voltage: Approx. 3.5V 

   OK or NG

   1. OK: GO TO 5.
   2. NG: Replace audio unit. Refer to "REMOVAL AND INSTALLATION FOR AUDIO UNIT ".
      Fig 4: Checking Signal Between Audio Unit Harness Connector M45 Terminal 66

      Courtesy of NISSAN MOTOR CO., U.S.A.
5. Check Audio RX Communication Signal 

1. Turn ignition switch ON.
2. Check the signal between display unit harness connector M93 terminal 10 (W/R) and ground with CONSULT-II or oscilloscope.

1. 10 (W/R)-Ground: Refer to "Terminals And Reference Value For Display Unit  ".

OK or NG

1. OK: INSPECTION END.
2. NG: Replace display unit. Refer to "Removal And Installation Of Display Unit  ".
   Fig 5: Checking Signal Between Display Unit Harness Connector M93 Terminal 10

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