Nissan Maxima Service and Repair Manual: DTC/circuit diagnosis

  • Power supply and ground circuit
  • AUDIO UNIT AUDIO UNIT : Diagnosis Procedure 1.CHECK FUSES 2.POWER SUPPLY CIRCUIT CHECK Disconnect audio unit connector M132. Check voltage between the audio unit connector M132 and ground. 3.GROUND CIRCUIT CHECK Inspect audio unit case ground. DISPLAY UNIT DISPLAY UNIT : Diagnosis Procedure 1.CHECK FUSES Check that the following fuses are not blown. 2.POWER SUPPLY CIRCUIT CHECK Turn ignition switch OFF. Disconnect display unit connector. Check voltage between the display unit and ground. 3.GROUND CIRCUIT CHECK Turn ignition switch OFF. Check continuity between display unit harness connector and ground. BOSE SPEAKER AMP BOSE SPEAKER AMP : Diagnosis Procedure 1.

  • Front door speaker
  • Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the front door speakers using the audio signal circuits. Diagnosis Procedure 1.CONNECTOR CHECK Check the audio unit, BOSE speaker amp. and speaker connectors for the following: Proper connection Damage Disconnected or loose terminals 2.HARNESS CHECK Disconnect BOSE speaker amp. connector B109 and suspect speaker connector. Check continuity between BOSE speaker amp. harness connector B109 (A) and suspect speaker harness connector (B). Check continuity between BOSE speaker amp. harness connector B109 (A) and ground. 3.

  • Tweeter
  • Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the tweeters using the audio signal circuits. Diagnosis Procedure 1.CONNECTOR CHECK Check the audio unit, BOSE speaker amp. and speaker connectors for the following: Proper connection Damage Disconnected or loose terminals 2.HARNESS CHECK Disconnect BOSE speaker amp. connector B110 and suspect tweeter connector. Check continuity between BOSE speaker amp. harness connector B110 (A) and suspect tweeter harness connector (B). Check continuity between BOSE speaker amp. harness connector B110 (A) and ground. 3.

  • Center speaker
  • Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the center speaker using the audio signal circuits. Diagnosis Procedure 1.CONNECTOR CHECK Check the audio unit, BOSE speaker amp. and speaker connectors for the following: Proper connection Damage Disconnected or loose terminal 2.HARNESS CHECK Disconnect BOSE speaker amp. connector B109 and center speaker connector M130. Check continuity between BOSE speaker amp. harness connector B109 (A) and center speaker harness connector M130 (B). Check continuity between BOSE speaker amp. harness connector B109 (A) and ground. 3.

  • Rear door speaker
  • Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the rear door speakers using the audio signal circuits. Diagnosis Procedure 1.CONNECTOR CHECK Check the audio unit, BOSE speaker amp. and speaker connectors for the following: Proper connection Damage Disconnected or loose terminals 2.HARNESS CHECK Disconnect BOSE speaker amp. connectors B109, B110 and suspect speaker connector. Check continuity between BOSE speaker amp. harness connectors B109 (A) and B110 (B) and suspect speaker harness connector (C). Check continuity between BOSE speaker amp. harness connectors B109 (A) and B110 (B) and ground.

  • Subwoofer
  • Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the subwoofers using the audio signal circuits. Diagnosis Procedure 1.CONNECTOR CHECK Check the audio unit, BOSE speaker amp. and subwoofer connectors for the following: Proper connection Damage Disconnected or loose terminals 2.HARNESS CHECK Disconnect BOSE speaker amp. connector B110 and suspect rear subwoofer connector. Check continuity between BOSE speaker amp. harness connector B110 (A) and suspect rear subwoofer harness connector (B). Check continuity between BOSE speaker amp. harness connector B110 (A) and ground. 3.

  • AMP on signal circuit
  • Description When the audio system is turned on, a voltage signal is supplied from the audio unit to the BOSE speaker amp. When this signal is received, the BOSE speaker amp. will turn on. Diagnosis Procedure 1.CHECK AMP ON SIGNAL (BOSE SPEAKER AMP) Turn audio system ON. Check voltage between BOSE speaker amp. harness connector B109 terminal 20 and ground. 2.CHECK AMP ON SIGNAL (AUDIO UNIT) Check voltage between audio unit harness connector M132 terminal 1 and ground.

  • Steering switch
  • Description When one of the steering wheel audio control switches is pushed, the resistance in the steering wheel audio control switch circuit changes, depending on which button is pushed. Diagnosis Procedure 1.CHECK STEERING SWITCH RESISTANCE Disconnect steering switch connector M88. Check resistance between steering switch connector termina 2.CHECK HARNESS BETWEEN COMBINATION SWITCH (SPIRAL CABLE) AND BLUETOOTH CONTROL UNIT Turn ignition switch OFF. Disconnect Bluetooth control unit connector B131 and combination switch (spiral cable) connector M30. Check continuity between Bluetooth control unit harness connector B131 and combination switch (spiral cable) harness connector M30.

  • Microphone signal circuit
  • Description Voice signals are transmitted from the microphone to the Bluetooth control unit using the microphone signal circuits. Diagnosis Procedure 1.CHECK HARNESS BETWEEN BLUETOOTH CONTROL UNIT AND MICROPHONE Turn ignition switch OFF. Disconnect Bluetooth control unit connector and microphone connector. Check continuity between Bluetooth control unit harness connector B131 (A) and microphone harness connector R7 (B). Check continuity between Bluetooth control unit harness connector B131 (A) and gro 2.CHECK MICROPHONE POWER SUPPLY Connect Bluetooth control unit connector and microphone connector. Turn ignition switch ON.

Diagnosis system (bluetooth control unit)

Power supply and ground circuit