Nissan Altima 2007-2012 Service Manual: Door speaker (coupe)

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 door speakers using the audio signal circuits.

Diagnosis Procedure

1.HARNESS CHECK

1. Disconnect BOSE speaker amp. connector B121 and suspect speaker connector.

2. Check continuity between BOSE speaker amp. harness connector B121 (A) and suspect speaker harness connector (B).

3. Check continuity between BOSE speaker amp. harness connector B121 (A) and ground.

Are continuity test results as specified? YES >> GO TO 2

NO >> • Check connector housings for disconnected or loose terminals.

• Repair harness or connector.

2.DOOR SPEAKER SIGNAL CHECK

1. Connect BOSE speaker amp. connector B121 and suspect speaker connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between BOSE speaker amp. harness connector B121 terminals with CONSULT-III or oscilloscope.

Is audio signal voltage as specified? YES >> Replace suspect speaker. Refer to AV-442, "Removal and Installation".

NO >> GO TO 3

3.HARNESS CHECK

1. Disconnect AV control unit connector M47 and BOSE speaker amp. connector B121.

2. Check continuity between audio unit harness connector M47 (A) and BOSE speaker amp. harness connector B121 (B).

3. Check continuity between AV control unit harness connector M47 (A) and ground.

Are continuity test results as specified? YES >> GO TO 4

NO >> • Check connector housings for disconnected or loose terminals.

• Repair harness or connector.

4.DOOR SPEAKER SIGNAL CHECK

1. Connect AV control unit connector and BOSE speaker amp.

connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between AV control unit harness connector terminals with CONSULT-III or oscilloscope.

Are the audio signal voltage readings as specified? YES >> Replace BOSE speaker amp. Refer to AV-438, "Removal and Installation - Coupe".

NO >> Replace AV control unit. Refer to AV-437, "Removal and Installation".

    Microphone
    Diagnosis Procedure 1.CHECK POWER SUPPLY CIRCUIT (MICROPHONE SIDE) Check voltage between microphone harness connector and ground. Is proper voltage present? YES >> GO TO 4 NO >> G ...

    Front door speaker (sedan)
    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 c ...

    Other materials:

    P0550 PSP Sensor
    Description Power steering pressure (PSP) sensor is installed to the power steering high-pressure tube and detects a power steering load. This sensor is a potentiometer which transforms the power steering load into output voltage, and emits the voltage signal to the ECM. The ECM controls ...

    ECM branch line circuit
    Diagnosis Procedure INSPECTION PROCEDURE 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side). - ECM - Harnes ...

    DLC Branch line circuit
    Diagnosis Procedure INSPECTION PROCEDURE 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the terminals and connectors of the data link connector for damage, bend and loose connection (connector side and harness side) ...