Inspection Procedure 3: No sound is heard.


caution Whenever the multivision display is replaced, ensure that the power supply circuit and the earthing circuit are normal. (Check that the voltage is 10 V or more.)

COMMENTS ON TROUBLE SYMPTOM


If the sound is not output, the multivision display may have a problem. In addition, if any of the speakers is short-circuited, the protection circuit inside the multivision display disables all the speakers to sound. Therefore, if all the speakers do not output sound, the speaker circuit may be shorted or the speaker may be defective. In some cases, the sound is output depending on sources, thus use the radio, CD/DVD, and others to check if the sound is output.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Check a trouble spot.
Check which speaker does not sound.

Q. Which speaker does not sound?
NO (No speakers sound.) : Go to Step 2.
NO (No sound is heard from one of the speakers.) : Go to Step 5.

STEP 2. Check the multivision display operation.

Q. Check the sources from which the sound is not output.
No sound only from radio : Perform Inspection Procedure 4 "The radio broadcasting can not be received." (Refer to .)
No sound only when the CD/DVD is played : Perform Inspection Procedure 5 "CD/DVD cannot be played." (Refer to .)
No sound only when the USB memory/iPod is played : Perform Inspection Procedure 6 "An audio file, which is stored in the SD memory card/USB memory/iPod, cannot be played." (Refer to .)
No sound only when the SD memory card is played : Perform Inspection Procedure 7 "An audio file, which is stored in the SD memory card, cannot be played." (Refer to .)
No sound from any of the sources : Go to Step 3.

STEP 3. Check the speaker.
(1)Remove the speaker. Refer to .

(2)Check that the speaker outputs the noise when the voltage of 5 V is applied to the speaker connector terminal.

Q. Do the speaker output the noise?

Go to Step 4.

Replace the speaker.

STEP 4. Check the wiring harness between the speaker connector terminal and the multivision display connector terminal.

  • Check of short circuit in DFR+, DFR- line front door speaker (RH) connector and multivision display connector. <Front door speaker (RH)>
  • Check of short circuit in DFL+, DFL- line front door speaker (LH) connector and multivision display connector. <Front door speaker (LH)>
  • Check of short circuit in RR+, RR- line rear door speaker (RH) connector and multivision display connector. <Rear door speaker (RH)>
  • Check of short circuit in RL+, RL- line rear door speaker (LH) connector and multivision display connector. <Rear door speaker (LH)>

Q. Is the check result normal?
Go to Step 7.
Repair the connector(s) or wiring harness.

STEP 5. Check the speaker.
Check which speaker does not sound.
(1)Remove the speaker. Refer to .

(2)Check that the speaker outputs the noise when the voltage of 5 V is applied to the speaker connector terminal.

Q. Is the check result normal?

Go to Step 6.

Replace the speaker.

STEP 6. Check the wiring harness between the speaker connector terminal and the multivision display connector terminal.
Check which speaker circuit is defective.

  • Check of open circuit in DFR+, DFR- line front door speaker (RH) connector and multivision display connector. <Front door speaker (RH)>
  • Check of open circuit in DFL+, DFL- line front door speaker (LH) connector and multivision display connector. <Front door speaker (LH)>
  • Check of open circuit in RR+, RR- line rear door speaker (RH) connector and multivision display connector. <Rear door speaker (RH)>
  • Check of open circuit in RL+, RL- line rear door speaker (LH) connector and multivision display connector. <Rear door speaker (LH)>

Q. Is the check result normal?
Go to Step 7.
Repair the connector(s) or wiring harness.

STEP 7. Retest the system
Check if the sound is output from all the speakers.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the multivision display.