2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

AV Communication Line Check

WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK A/C AND AV SWITCH CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect display unit connector and A/C and AV switch connector.
    3. Check continuity between display unit and A/C and AV switch.
      A/C AND AV SWITCH CIRCUIT CHECK CHART

      Terminals Continuity
      Display unit A/C and AV switch
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      M39 11 (L/G) M48 6 (L/G) Yes
      13 (L/R) 8 (L/R)
      12 7
    4. Check continuity between display unit and ground.
    AV COMMUNICATION LINE HARNESS CHECK CHART

    Terminals Continuity
    Connector Terminal (Wire color) Terminal
    M39 11 (L/G) Ground No
    13 (L/R)

    OK or NG

    1. OK : GO TO 2.
    2. NG : Replace harness.
    Fig 1: Checking Continuity Between Display Unit And A/C And AV Switch, And Between Display Unit And Ground
    G03359949Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK AV COMMUNICATION SIGNAL 
    1. Connect display unit connector and A/C and AV switch connector.
    2. Turn ignition switch ON.
    3. Check the signal between display unit harness connector M39 terminals 11 (L/G), 13 (L/R) and ground with CONSULT-II or oscilloscope.
    1. 11 (L/G), 13 (L/R) - Ground : Refer to " TERMINALS AND REFERENCE VALUE FOR DISPLAY UNIT   ". 

    OK or NG

    1. OK : Replace A/C and AV switch.
    2. NG : Replace display unit.
    Fig 2: Checking Voltage Between Display Unit Harness Connector M39 Terminals 11, 13 And Ground
    G03359950Courtesy of NISSAN MOTOR CO., U.S.A.
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