NO.3 NO SOUND FROM ALL SPEAKERS [AUDIO]

id0903e1803200

3

No sound from all speakers

Possible DTC

05:Er07, 09:Er20, 09:Er21, 10:Er07, 22:Er07
Possible cause
•  Speaker malfunction (e.g., foreign material penetration, damage)
•  Audio unit malfunction
•  Short circuit in wiring harness between audio unit and speaker
•  Short circuit inside speaker

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Press AUDIO CONT switch for 1 s or more.
•  Play the CD or Radio.
•  Adjust the volume between “10” and “15”.
•  Is there sound?
Note
•  Press the MENU switch for approx. 1 s or more to initialize the sound adjustment value, then start the inspection.
Yes
The system is normal.
No
Go to the next step.
2
•  Switch the ignition to off.
•  Remove the center panel unit.
•  Disconnect the audio connector (24-pin).
•  Inspect the continuity between the audio unit wiring harness-side connector terminal and ground:
For front door speakers
―  Terminal 1A (LH+)—GND
―  Terminal 1C (LH-)—GND
―  Terminal 1D (RH+)—GND
―  Terminal 1F (RH-)—GND
For rear door speakers (5HB)/rear speakers (3HB)
―  Terminal 1S (LH+)—GND
―  Terminal 1U (LH-)—GND
―  Terminal 1V (RH+)—GND
―  Terminal 1X (RH-)—GND
―  Is there continuity?
Yes
Repair or replace the suspect wiring harness or speaker unit.
Note
•  If there is a short circuit between the speaker harness or speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.
No
Go to the next step.
3
•  Remove the speaker.
•  Disconnect the speaker connector (4-pin).
•  Inspect the continuity between the speaker wiring harness-side connector (4-pin) terminal and ground:
For each speaker
―  Terminal B—GND
―  Terminal C—GND
•  Is there continuity?
Yes
Replace the speaker.
No
Replace the audio unit.
(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)