Inspection Procedure 2: No sound is heard. <Vehicles without audio amplifier>


caution Before replacing the multivision display, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of multivision display
  • Malfunctions of speaker or tweeter
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Checking with speaker test
Perform the speaker test, and check which speaker or tweeter does not output the sound. Refer to .

Q. Is the check result normal?
YES : 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 (No speakers and tweeters sound.) : Go to Step 2
NO (No sound is heard from one of the speakers or tweeters.) : Go to Step 5

STEP 2. Connector check: C-104 multivision display connector, F-11 <front-LH>, F-08 <front-RH>, F-23 <rear-LH> or F-20 <rear-RH> door speaker connector, F-02 <LH>, F-03 <RH> tweeter connector

Q. Is the check result normal?
Go to Step 3
Repair the defective connector.

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

Q. Do the speaker output the noise?
Go to Step 4
Replace the speaker or tweeter.

STEP 4. Check the wire harness between the speaker or tweeter connector terminal and the multivision display connector terminal.
Check the communication lines for open circuit and short circuit.

  • <Front door speaker (LH)> Check the wire harness between F-11 front door speaker (LH) connector terminal No.1, 2 and C-104 multivision display connector terminal No.28, 38.
    note Prior to the wiring harness inspection, check intermediate connector C-225, and repair if necessary.
  • <Front door speaker (RH)> Check the wire harness between F-08 front door speaker (RH) connector terminal No.1, 2 and C-104 multivision display connector terminal No.26, 36.
    note Prior to the wiring harness inspection, check intermediate connector C-212, and repair if necessary.
  • <Rear door speaker (LH)> Check the wire harness between F-23 rear door speaker (LH) connector terminal No.1, 2 and C-104 multivision display connector terminal No.27, 37.
    note Prior to the wiring harness inspection, check intermediate connectors C-26 and F-22, and repair if necessary.
  • <Rear door speaker (RH)> Check the wire harness between F-20 rear door speaker (RH) connector terminal No.1, 2 and C-104 multivision display connector terminal No.25, 35.
    note Prior to the wiring harness inspection, check intermediate connectors C-17 and F-21, and repair if necessary.
  • <Tweeter (LH)> Check the wire harness between F-02 tweeter (LH) connector terminal No.2, 1 and C-104 multivision display connector terminal No.28, 38.
    note Prior to the wiring harness inspection, check intermediate connector C-225, and repair if necessary.
  • <Tweeter (RH)> Check the wire harness between F-03 tweeter (RH) connector terminal No.2, 1 and C-104 multivision display connector terminal No.26, 36.
    note Prior to the wiring harness inspection, check intermediate connector C-212, and repair if necessary.

Q. Is the check result normal?
Go to Step 8.
Repair the wiring harness.

STEP 5. Connector check: C-104 multivision display connector, F-11 <front-LH>, F-08 <front-RH>, F-23 <rear-LH> or F-20 <rear-RH> door speaker connector, F-02 <LH>, F-03 <RH> tweeter connector.

Q. Is the check result normal?
Go to Step 6
Repair the defective connector.

STEP 6. Check the speaker or tweeter.
Follow the speaker test to check which speaker or tweeter does not sound.
(1)Remove the speaker or tweeter. Refer to .
(2)Check that the speaker or tweeter 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 7
Replace the speaker or tweeter.

STEP 7. Check the wire harness between the speaker or tweeter connector terminal and the multivision display connector terminal.
Check the communication lines for open circuit and short circuit.

  • <Front door speaker (LH)> Check the wire harness between F-11 front door speaker (LH) connector terminal No.1, 2 and C-104 multivision display connector terminal No.28, 38.
    note Prior to the wiring harness inspection, check intermediate connector C-225, and repair if necessary.
  • <Front door speaker (RH)> Check the wire harness between F-08 front door speaker (RH) connector terminal No.1, 2 and C-104 multivision display connector terminal No.26, 36.
    note Prior to the wiring harness inspection, check intermediate connector C-212, and repair if necessary.
  • <Rear door speaker (LH)> Check the wire harness between F-23 rear door speaker (LH) connector terminal No.1, 2 and C-104 multivision display connector terminal No.27, 37.
    note Prior to the wiring harness inspection, check intermediate connectors C-26 and F-22, and repair if necessary.
  • <Rear door speaker (RH)> Check the wire harness between F-20 rear door speaker (RH) connector terminal No.1, 2 and C-104 multivision display connector terminal No.25, 35.
    note Prior to the wiring harness inspection, check intermediate connectors C-17 and F-21, and repair if necessary.
  • <Tweeter (LH)> Check the wire harness between F-02 tweeter (LH) connector terminal No.2, 1 and C-104 multivision display connector terminal No.28, 38.
    note Prior to the wiring harness inspection, check intermediate connector C-225, and repair if necessary.
  • <Tweeter (RH)> Check the wire harness between F-03 tweeter (RH) connector terminal No.2, 1 and C-104 multivision display connector terminal No.26, 36.
    note Prior to the wiring harness inspection, check intermediate connector C-212, and repair if necessary.

Q. Is the check result normal?
Go to Step 8.
Repair the wiring harness.

STEP 8. Retest the system
Check if the sound is output from all the speakers or tweeters.

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.