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-219, "Removal and Installation".

NO >> GO TO 3

3.HARNESS CHECK

1. Disconnect audio unit connector M43 and BOSE speaker amp.

connector B121.

2. Check continuity between audio unit harness connector M43 (A) and BOSE speaker amp. harness connector B121 (B).

3. Check continuity between audio unit harness connector M43 (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 audio unit connector and BOSE speaker amp. connector.

2. Turn ignition switch ACC.

3. Push “POWER” switch.

4. Check the signal between audio 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-216, "Removal and Installation - Coupe".

NO >> Replace audio unit. Refer to AV-215, "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 ci ...

    Other materials:

    Heater and Air Conditioner (automatic) (if so equipped)
    1. (front defroster) button 2. Temperature control dial (driver’s side)/ AUTO (automatic) climate control button 3. Display screen 4. Temperature control dial (passenger’s side)/DUAL (passenger’s side temperature control) button 5. Fresh air intake button 6. Air recirculation butt ...

    Fuel-filler cap
    WARNING ● Gasoline is extremely flammable and highly explosive under certain conditions. You could be burned or seriously injured if it is misused or mishandled. Always stop the engine and do not smoke or allow open flames or sparks near the vehicle when refueling. ● Do not a ...

    P0776 pressure control solenoid B performance (sec pressure solenoid valve)
    Description The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the secondary pressure to suit the driving condition in response to a signal sent from the TCM. DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE CAUTION: Always drive vehicle at a safe ...