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SATELLITE RADIO TUNER: Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS - 1
    1. Turn ignition switch OFF.
    2. Disconnect satellite radio tuner (factory installed) connector B111 and audio unit connector M138.
    3. Check continuity between satellite radio tuner (factory installed) harness connector B111 (A) terminal 28 and audio unit harness connector M138 (B) terminal 38.
      CONNECTOR TERMINAL CONTINUITY CHART

      A B Continuity
      Connector Terminal Connector Terminal
      B111 28 M138 38 Yes
      Fig 1: Checking Continuity Between Satellite Radio Tuner Connector B111 Terminal 28 And Audio Unit Connector M138 Terminal 38
      G05885810Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check continuity between satellite radio tuner (factory installed) harness connector B111 (A) terminal 28 and ground.
    CONNECTOR TERMINAL CONTINUITY CHART

    A - Continuity
    Connector Terminal
    B111 28 Ground No

    Are continuity results as specified? 

    YES: GO TO 2.

    NO: Repair harness or connector.

  2. CHECK HARNESS - 2
    1. Check continuity between satellite radio tuner (factory installed) harness connector B111 (A) terminal 29 and audio unit harness connector M138 (B) terminal 39.
      CONNECTOR TERMINAL CONTINUITY CHART

      A B Continuity
      Connector Terminal Connector Terminal
      B111 29 M138 39 Yes
      Fig 2: Checking Continuity Between Satellite Radio Tuner Connector B111 Terminal 29 And Audio Unit Connector M138 Terminal 39
      G05885811Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Check continuity between satellite radio tuner (factory installed) harness connector B111 (A) terminal 29 and ground.
    CONNECTOR TERMINAL CONTINUITY CHART

    A - Continuity
    Connector Terminal
    B111 29 Ground No

    Are continuity results as specified? 

    YES: GO TO 3.

    NO: Repair harness or connector.

  3. CHECK HARNESS - 3
    1. Check continuity between satellite radio tuner (factory installed) harness connector B111 (A) terminal 30 and audio unit harness connector M138 (B) terminal 40.
      CONNECTOR TERMINAL CONTINUITY CHART

      A B Continuity
      Connector Terminal Connector Terminal
      B111 30 M138 40 Yes
      Fig 3: Checking Continuity Between Satellite Radio Tuner Connector B111 Terminal 30 And Audio Unit Harness Connector M138 Terminal 40
      G05885812Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Check continuity between satellite radio tuner (factory installed) harness connector B111 (A) terminal 30 and ground.
    CONNECTOR TERMINAL CONTINUITY CHART

    A - Continuity
    Connector Terminal
    B111 30 Ground No

    Are continuity results as specified? 

    YES: GO TO 4.

    NO: Repair harness or connector.

  4. CHECK REQ1 SIGNAL
    1. Connect satellite radio tuner (factory installed) connector and audio unit connector.
    2. Turn ignition switch to ACC.
    3. Check signal between satellite radio tuner (factory installed) harness connector B111 terminal 28 and ground with CONSULT-III or oscilloscope.
    CONNECTOR TERMINAL SIGNAL CHART

    (+) (-) Reference signal
    Connector Terminal
    B111 28 Ground
    G05885813Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 4: Checking Signal Between Satellite Radio Tuner Connector B111 Terminal 28 And Ground
    G05885814Courtesy of NISSAN MOTOR CO., U.S.A.

    Are voltage readings as specified? 

    YES: GO TO 5.

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

  5. CHECK TXD SIGNAL

    Check signal between satellite radio tuner (factory installed) harness connector B111 terminal 29 and ground with CONSULT-III or oscilloscope.

    CONNECTOR TERMINAL SIGNAL CHART

    (+) (-) Reference signal
    Connector Terminal
    B111 29 Ground
    G05885815Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 5: Checking Signal Between Satellite Radio Tuner Connector B111 Terminal 29 And Ground
    G05885816Courtesy of NISSAN MOTOR CO., U.S.A.

    Are the voltage readings as specified? 

    YES: GO TO 6.

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

  6. CHECK RXD SIGNAL

    Check signal between satellite radio tuner (factory installed) harness connector B111 terminal 30 and ground with CONSULT-III or oscilloscope.

    CONNECTOR TERMINAL SIGNAL CHART

    (+) (-) Reference signal
    Connector Terminal
    B111 30 Ground
    G05885817Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 6: Checking Signal Between Satellite Radio Tuner Connector B111 Terminal 30 And Ground
    G05885818Courtesy of NISSAN MOTOR CO., U.S.A.

    Are the voltage readings as specified? 

    YES: Replace satellite radio tuner. Refer to "REMOVAL AND INSTALLATION ".

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

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