Front Tweeter Circuit Check

Front Tweeter Circuit Check

Description

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

Diagnosis Procedure

Regarding Wiring Diagram information, refer to [Base Audio System: Wiring Diagram [Base Audio] Base Audio System [Base Audio] ].

1. CONNECTOR CHECK

Check the audio unit and speaker connectors for the following:
- Proper connection
- Damage
- Disconnected or loose terminals

Is the inspection result normal?
YES
GO TO 2.
NO
Repair the terminal and connector.

2. HARNESS CHECK

1 Disconnect audio unit connector M43 and suspect front tweeter connector.





2 Check continuity between audio unit harness connector M43 (A) and suspect front tweeter harness connector (B).






3 Check continuity between audio unit harness connector M43 (A) and ground.






Are the continuity results as specified?
YES
GO TO 3
NO
- Check connector housings for disconnected or loose terminals.
- Repair or replace harness or connector.

3. FRONT TWEETER SIGNAL CHECK

1 Connect audio unit connector M43 and front tweeter connector.





2 Turn ignition switch to ACC.
3 Push audio unit "POWER" switch.
4 Check the signal between audio unit harness connector M43 terminals with SDT or oscilloscope.






Is the audio signal voltage as specified?
YES
Replace the suspect front tweeter. Refer to [Front Tweeter: Removal and Installation] Front Tweeter.
NO
Replace audio unit. Refer to [Audio Unit: Removal and Installation] Audio Unit.