Nissan Altima 2007-2012 Service Manual: Rear tweeter (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 rear tweeters using the audio signal circuits.

Diagnosis Procedure

1.HARNESS CHECK

1. Disconnect BOSE speaker amp. connectors B121, B122 and suspect tweeter connector.

2. Check continuity between BOSE speaker amp. harness connectors B121 (A) and B122 (B) and suspect tweeter harness connector (C).


3. Check continuity between BOSE speaker amp. harness connectors


3. Check continuity between BOSE speaker amp. harness connectors B121 (A) and B122 (B) and ground.

Are the continuity test results as specified?


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

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

• Repair harness or connector.

2.REAR TWEETER SIGNAL CHECK

1. Connect BOSE speaker amp. connectors B121, B122 and suspect tweeter connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between BOSE speaker amp. harness connectors (A) B121 and (B) B122 terminals with CONSULT-III or oscilloscope.


Is the audio signal voltage readings as specified?


Is the audio signal voltage readings as specified? YES >> Replace suspect tweeter. Refer to AV-444, "Removal and Installation - Coupe".

NO >> GO TO 3.

3.HARNESS CHECK

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

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


3. Check continuity between AV control unit harness connector


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

Are continuity test results as specified?


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

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

• Repair harness or connector.

4.REAR TWEETER SIGNAL CHECK

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

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between AV control unit harness connector M47 terminals with CONSULT-III or oscilloscope.


Are the audio signal voltage readings as specified?


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".

    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 circuit ...

    Rear 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 rear door speakers using the audio signal cir ...

    Other materials:

    P0117, P0118 ECT sensor
    Description The engine coolant temperature sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change i ...

    Power supply and ground circuit for front air control
    Description FRONT AIR CONTROL The front air control has a built-in microcomputer which processes information sent from temperature control dial and various switches needed for air conditioner operation. The air mix door motor, mode door motor, intake door motor, blower motor and compressor are ...

    Vehicle Dynamic Control (VDC) off switch
    The vehicle should be driven with the Vehicle Dynamic Control (VDC) system on for most driving conditions. If the vehicle is stuck in mud or snow, the VDC system reduces the engine output to reduce wheel spin. The engine speed will be reduced even if the accelerator is depressed to the flo ...