Front Door Speaker Circuit Check

Front Door Speaker Circuit Check

Description

The audio unit sends audio signals to the front door speakers using the front door speaker 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 speaker connector.





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






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






Are 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 SPEAKER SIGNAL CHECK

1 Connect audio unit connector M43 and front speaker 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 speaker. Refer to [Front Door Speaker: Removal and Installation] Front Door Speaker.
NO
Replace audio unit. Refer to [Audio Unit: Removal and Installation] Audio Unit.