Nissan Maxima Service and Repair Manual: Center speaker

Description

The AV control 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 AV control unit, BOSE speaker amp. and speaker connectors for the following:

• Proper connection
• Damage
• Disconnected or loose terminals

2.HARNESS CHECK

1. Disconnect BOSE speaker amp. connector B109 and center speaker connector M130.
2. Check continuity between BOSE speaker amp. harness connector B109 (A) and center speaker harness connector M130 (B).
3. Check continuity between BOSE speaker amp. harness connector B109 (A) and ground.

3.CENTER SPEAKER SIGNAL CHECK

1. Connect BOSE speaker amp. connector B109 and center speaker connector.
2. Turn ignition switch to ACC.
3. Push POWER switch.
4. Check the signal between BOSE speaker amp. harness connector B109 terminals with CONSULT or oscilloscope.

4.HARNESS CHECK

1. Disconnect AV control unit connector M157 and BOSE speaker amp. connector B109.
2. Check continuity between AV control unit harness connector M157 (A) and BOSE speaker amp. harness connector B109 (B).
3. Check continuity between AV control unit harness connector M157 (A) and ground.

5.CENTER 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 or oscilloscope.