Nissan Altima 2007-2012 Service Manual: Subwoofer (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 subwoofers using the audio signal circuits.

Diagnosis Procedure

1.HARNESS CHECK

1. Disconnect BOSE speaker amp. connector B122 and suspect rear subwoofer connector.

2. Check continuity between BOSE speaker amp. harness connector B122 (A) and suspect rear subwoofer harness connector (B).

3. Check continuity between BOSE speaker amp. harness connector B122 (A) and ground.

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 SUBWOOFER SIGNAL CHECK

1. Connect BOSE speaker amp. connector B122 and suspect rear subwoofer connector.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between BOSE speaker amp. harness connector B122 terminals with CONSULT-III or oscilloscope.

Is the audio signal voltage as specified? YES >> Replace suspect rear subwoofer. Refer to AV-222, "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) terminal 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.REAR SUBWOOFER SIGNAL CHECK

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

connector B121.

2. Turn ignition switch to ACC.

3. Push “POWER” switch.

4. Check the signal between audio unit harness connector M43 terminals with CONSULT-III or oscilloscope.

Is the audio signal voltage 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".

    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 ci ...

    Subwoofer (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 subwoofers using the audio signal circuits. D ...

    Other materials:

    License lamp finisher
    Removal and Installation 1. License lamp finisher REMOVAL 1. Remove the trunk lid finisher (if equipped). Refer to INT-22, "Exploded View". 2. Remove the license lamp finisher nuts. 3. Remove license lamp finisher by pulling toward the rear, then disconnect the trunk request ...

    P0448 evap canister vent control valve
    Description The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent. This solenoid valve responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the c ...

    Subwoofer
    Components 1. Subwoofer speaker 2. Spacer A. Screws Removal and Installation REMOVAL 1. Remove the rear parcel shelf finisher. Refer to INT-17, "Removal and Installation" (coupe) and INT-38, "Removal and Installation" (sedan). 2. Remove the trunk front finisher. Re ...