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Inspection Procedure 2: No sound is heard. <Vehicles without audio amplifier>
 
 
cautionBefore replacing the multivision display, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TECHNICAL DESCRIPTION (COMMENT)
If the audio sound is not output, the multivision display may have a problem. In addition, if any of the speakers or tweeters is short-circuited, the protection circuit inside the multivision display disables all the speakers or tweeters to sound. Therefore, if all the speakers do not output sound, the speaker or tweeter circuit may be shorted or the speaker or tweeter may be defective.
 
 
TROUBLESHOOTING HINTS
  • The multivision display may be defective
  • The speaker or tweeter may be defective
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
 
 
DIAGNOSIS
Required Special Tools:
  • MB991223: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Checking with audio speaker test.
Perform the audio speaker test, and check which speaker or tweeter does not output the sound.
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 ).
(No speakers and tweeters sound.) : Go to Step 2.
(No sound is heard from one of the speakers or tweeters.) : Go to Step 5.
 
STEP 2. Check the speaker or tweeter.
(1) Remove the speaker or tweeter.
(2) Check that the speaker or tweeter outputs the noise when the voltage of 5 V is applied to the speaker or tweeter connector terminal.
Do the speaker output the noise?
Go to Step 3.
Replace the speaker or tweeter.
 
STEP 3. Check the following connectors.
Check the following connectors:
  • C-138 multivision display connector
  • F-11 front door speaker (LH) connector
  • F-08 front door speaker (RH) connector
  • F-23 rear door speaker (LH) connector
  • F-20 rear door speaker (RH) connector
  • F-02 tweeter (LH) connector
  • F-03 tweeter (RH) connector
Are all the connectors in good condition?
Go to Step 4.
Repair or replace the damaged component (Refer to GROUP 00E, Harness Connector Inspection ).
 
STEP 4. Check the wiring harness between the speaker or tweeter connector terminal and the multivision display connector terminal.
Check the communication lines for short circuit.
  • <Front door speaker (LH)> Check the wiring harness between front door speaker (LH) connector F-11 (terminal 1, 2) and multivision display connector C-138 (terminal 28, 38).
    noteAlso check intermediate connector C-225 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-225 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Front door speaker (RH)> Check the wiring harness between front door speaker (RH) connector F-08 (terminal 1, 2) and multivision display connector C-138 (terminal 26, 36).
    noteAlso check intermediate connector C-212 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-212 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Rear door speaker (LH)> Check the wiring harness between rear door speaker (LH) connector F-23 (terminal 1, 2) and multivision display connector C-138 (terminal 27, 37).
    noteAlso check intermediate connectors C-26 and F-22 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-26 or F-22 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Rear door speaker (RH)> Check the wiring harness between rear door speaker (RH) connector F-20 (terminal 1, 2) and multivision display connector C-138 (terminal 25, 35).
    noteAlso check intermediate connectors C-17 and F-21 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-17 or F-21 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Tweeter (LH)> Check the wiring harness between tweeter (LH) connector F-02 (terminal 1, 2) and multivision display connector C-138 (terminal 38, 28).
    noteAlso check intermediate connector C-225 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-225 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Tweeter (RH)> Check the wiring harness between tweeter (RH) connector F-03 (terminal 1, 2) and multivision display connector C-138 (terminal 36, 26).
    noteAlso check intermediate connector C-212 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-212 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
Is the check result normal?
Go to Step 8.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
 
STEP 5. Check the speaker or tweeter.
Follow the speaker test to check which speaker or tweeter does not sound.
(1) Remove the speaker or tweeter.
(2) Check that the speaker or tweeter outputs the noise when the voltage of 5 V is applied to the speaker or tweeter connector terminal.
Do the speaker output the noise?
Go to Step 6.
Replace the speaker or tweeter.
 
STEP 6. Check the following connectors.
Check the following connectors:
  • C-138 multivision display connector
  • F-11 front door speaker (LH) connector
  • F-08 front door speaker (RH) connector
  • F-23 rear door speaker (LH) connector
  • F-20 rear door speaker (RH) connector
  • F-02 tweeter (LH) connector
  • F-03 tweeter (RH) connector
Are all the connectors in good condition?
Go to Step 7.
Repair or replace the damaged component (Refer to GROUP 00E, Harness Connector Inspection ).
 
STEP 7. Check the wiring harness between the speaker or tweeter connector terminal and the multivision display connector terminal.
Follow the speaker test to check which speaker or tweeter circuit is defective.
Check the communication lines for short circuit.
  • <Front door speaker (LH)> Check the wiring harness between front door speaker (LH) connector F-11 (terminal 1, 2) and multivision display connector C-138 (terminal 28, 38).
    noteAlso check intermediate connector C-225 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-225 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Front door speaker (RH)> Check the wiring harness between front door speaker (RH) connector F-08 (terminal 1, 2) and multivision display connector C-138 (terminal 26, 36).
    noteAlso check intermediate connector C-212 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-212 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Rear door speaker (LH)> Check the wiring harness between rear door speaker (LH) connector F-23 (terminal 1, 2) and multivision display connector C-138 (terminal 27, 37).
    noteAlso check intermediate connectors C-26 and F-22 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-26 or F-22 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Rear door speaker (RH)> Check the wiring harness between rear door speaker (RH) connector F-20 (terminal 1, 2) and multivision display connector C-138 (terminal 25, 35).
    noteAlso check intermediate connectors C-17 and F-21 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-17 or F-21 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Tweeter (LH)> Check the wiring harness between tweeter (LH) connector F-02 (terminal 1, 2) and multivision display connector C-138 (terminal 38, 28).
    noteAlso check intermediate connector C-225 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-225 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
  • <Tweeter (RH)> Check the wiring harness between tweeter (RH) connector F-03 (terminal 1, 2) and multivision display connector C-138 (terminal 36, 26).
    noteAlso check intermediate connector C-212 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-212 is damaged, repair or replace the connector as described in GROUP 00E, Harness Connector Inspection .
Is the check result normal?
Go to Step 8.
The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.
 
STEP 8. Retest the system.
Check if the sound is output from all the speakers or tweeters.
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 (Refer to ).