LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2010 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 264 (Audio, Visual, Navigation System) >> Audio Without Navigation >> DTC/Circuit Diagnosis >> Communication Signal Circuit >> Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Juke. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONTINUITY COMMUNICATION SIGNAL (AUDIO-SAT) CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect satellite radio tuner connector and audio unit connector.
    3. Check continuity between satellite radio tuner harness connector and audio unit harness connector.
      CONTINUITY REFERENCE CHART

      Satellite radio tuner Audio unit Continuity
      Connector Terminal Connector Terminal
      B69 9 M93 39 Existed
      10 40 Existed
    4. Check continuity between satellite radio tuner harness connector and ground.
      CONTINUITY REFERENCE CHART

      Satellite radio tuner Ground Continuity
      Connector Terminal
      B69 9 Not existed
      10

    Is inspection result OK? 

    YES: GO TO 2.

    NO: Repair harness or connector.

  2. CHECK AUDIO UNIT
    1. Connect audio unit connector.
    2. Turn ignition switch ON.
    3. Check voltage between audio unit harness connector and ground.
    VOLTAGE REFERENCE CHART

    Probe Reference value (Approx.)
    (+) (-)
    Audio unit Ground
    Connector Terminal
    M93 39 4.0 V

    Is inspection result OK? 

    YES: GO TO 3.

    NO: Replace audio unit. Refer to "REMOVAL AND INSTALLATION ".

  3. CHECK SATELLITE RADIO TUNER
    1. Turn ignition switch OFF.
    2. Disconnect audio unit connector, and connect satellite radio tuner connector.
    3. Turn ignition switch ON.
    4. Check voltage between satellite radio tuner harness connector and ground.
    VOLTAGE REFERENCE CHART

    Probe Reference value (Approx.)
    (+) (-)
    Satellite radio tuner Ground
    Connector Terminal
    B69 10 7.5 V

    Is inspection result OK? 

    YES: GO TO 4.

    NO: Replace satellite radio tuner. Refer to "REMOVAL AND INSTALLATION ".

  4. CHECK COMMUNICATION SIGNAL (SAT TO AUDIO)
    1. Turn ignition switch OFF.
    2. Connect audio unit connector.
    3. Turn ignition switch ON.
    4. Check signal between satellite radio tuner harness connector and ground.
    VOLTAGE REFERENCE CHART

    Probe Condition Standard Reference value
    (+) (+)
    Satellite radio tuner
    Connector Terminal Connector Terminal
    B69 9 B69 15 When satellite radio mode is selected. Waveform of 0.5 - 7.0 V is input.
    G05219856Courtesy of NISSAN MOTOR CO., U.S.A.

    Is inspection result OK? 

    YES: GO TO 5.

    NO: Replace satellite radio tuner. Refer to "REMOVAL AND INSTALLATION ".

  5. CHECK COMMUNICATION SIGNAL (AUDIO TO SAT)

    Check signal between audio unit harness connector and ground.

    SIGNAL REFERENCE CHART

    Probe Condition Standard Reference value
    (+) (+)
    Audio unit Ground
    Connector Terminal
    M93 40 When satellite radio mode is selected. Waveform of 1.5 - 6.0 V is input.
    G04890037Courtesy of NISSAN MOTOR CO., U.S.A.

    Is inspection result OK? 

    YES: INSPECTION END

    NO: Replace audio unit. Refer to "REMOVAL AND INSTALLATION ".

scientia non olet · About LEMON Manuals