NO.4 NO SOUND FROM SOME SPEAKERS [AUDIO]

id0903e1818100

4

No sound from some speakers

Possible DTC

—
Possible cause
•  Speaker malfunction (e.g., foreign material penetration, damage)
•  Audio unit malfunction
•  Short circuit inside speaker
•  Open or short circuit in wiring harness between audio unit and speaker

Diagnostic procedure

STEP

INSPECTION

ACTION
1
•  Activate the speaker Inspection mode.
•  Is there any speaker that does not output sound?
Yes
If there is no sound from some speakers:
•  Go to the next step.
If there is no sound at all:
•  Go to the troubleshooting of “No.3 No sound from all speakers”.
No
The troubleshooting is completed.
2
•  Switch the ignition to off.
•  Remove the center panel unit.
•  Inspect the continuity between the audio unit wiring harness-side connector (24-pin) terminal and ground.
•  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 the speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.
No
Go to the next step.
3
•  Switch the ignition to off.
•  Remove the center panel unit.
•  Disconnect the audio unit connector (24-pin).
•  Inspect the continuity between the audio unit wiring harness-side connector terminal and ground:
For front door speaker
―  Terminal 1A (LH+)—GND
―  Terminal 1C (LH-)—GND
―  Terminal 1D (RH+)—GND
―  Terminal 1F (RH-)—GND
For tweeter
―  Terminal 1A (LH+)—GND
―  Terminal 1C (LH-)—GND
―  Terminal 1D (RH+)—GND
―  Terminal 1F (RH-)—GND
For rear door speaker [5HB]/rear speaker [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.
4
•  Disconnect the speaker connector (4-pin/2-pin) and inspect the resistance of speaker/tweeter.
•  Inspect the continuity between the audio unit wiring harness-side connector terminal and speaker/tweeter wiring harness-side connector:
Audio unit—front door speaker
―  Terminal 1A (LH+)—terminal C
―  Terminal 1C (LH-)—terminal B
―  Terminal 1D (RH+)—terminal C
―  Terminal 1F (RH-)—terminal B
For tweeter
―  Terminal 1A (LH+). terminal B
―  Terminal 1C (LH-). terminal A
―  Terminal 1D (RH+). terminal B
―  Terminal 1F (RH-). terminal A
Audio unit—rear door speaker [5HB]/rear speaker [3HB]
―  Terminal 1S (LH+)—terminal C
―  Terminal 1U (LH-)—terminal B
―  Terminal 1V (RH+)—terminal C
―  Terminal 1X (RH-)—terminal B
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the suspect wiring harness or speaker/tweeter.
5
•  Inspect the suspect speaker/tweeter.
•  Is the speaker/tweeter normal?
Note
•  If the speaker/tweeter lead wire contacts to either ground or vehicle frame, replace the speaker.
Yes
Replace the audio unit.
(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)
No
Replace the speaker/tweeter.
(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)
(See REAR DOOR SPEAKER REMOVAL/INSTALLATION [5HB].)
(See REAR SPEAKER REMOVAL/INSTALLATION [3HB].)
(See TWEETER REMOVAL/INSTALLATION.)