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Home >> Infiniti >> 2012 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (Audio, Visual And Navigation System) >> BOSE Audio Without Navigation >> DTC/Circuit Diagnosis >> Communication Signal Circuit >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan 370Z. 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 SPECIFICATION

      Satellite radio tuner Audio unit Continuity
      Connector Terminal Connector Terminal
      B236 9 M83 39 Existed
      10 40 Existed
    4. Check continuity between satellite radio tuner harness connector and ground.
    CONTINUITY SPECIFICATION

    Satellite radio tuner Ground Continuity
    Connector Terminal
    B236 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 SPECIFICATION

    Audio unit Ground Voltage (Approx.)
    Connector Terminal
    M83 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 SPECIFICATION

    Satellite radio tuner Ground Voltage (Approx)
    Connector Terminal
    B236 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→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.
    SATELLITE RADIO TUNER CONDITION

    Satellite radio tuner Ground Condition Reference value
    Connector Terminal
    B236 9 When satellite radio mode is selected.
    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→SAT)

Check signal between audio unit harness connector and ground.

AUDIO UNIT CONDITION

Audio unit Ground Condition Reference value
Connector Terminal
B83 40 When satellite radio mode is selected.
G04890037Courtesy of NISSAN MOTOR CO., U.S.A.

Is inspection result OK? 

YES: INSPECTION END

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

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