Nissan Maxima Service and Repair Manual: Tweeter 

Description 

The audio unit sends audio signals to the tweeters using the front door speaker circuits.

Diagnosis Procedure

1.CONNECTOR CHECK

Check the audio unit and speaker connectors for the following:

• Proper connection
• Damage
• Disconnected or loose terminals

2.HARNESS CHECK

1. Disconnect audio unit connector M133 (A) and suspect tweeter connector (B).
2. Check continuity between audio unit harness connector M133 (A) and suspect tweeter harness connector (B).
3. Check continuity between audio unit harness connector M133 (A) and ground.

3.TWEETER SIGNAL CHECK

1. Connect audio unit connector and tweeter connector.
2. Turn ignition switch to ACC.
3. Push POWER switch.
4. Check the signal between audio unit harness connector terminals with CONSULT or oscilloscope.