Inspection Procedure 3: No Sound is Heard from One of The Speakers. <Vehicles without audio amplifier>


caution Before replacing the radio and CD player, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.














COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of speaker
  • Malfunctions of radio and CD player
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. ETACS-ECU coding data check
(1)Operate the M.U.T.-III to read the ETACS-ECU option coding information (Refer to GROUP 00 - Coding List ).
(2)Check that the result matches with the number of speakers ("6 speakers" or "4 speakers") specified by "Number of speaker."

Q. Is the check result normal?
Go to Step 2.
Operate the M.U.T.-III to set the option coding "Number of speaker" to "6 speakers" or "4 speakers", and check the trouble symptom.

STEP 2. Checking with audio speaker check
Perform the audio speaker check, and check which speaker does not output the sound. Refer to .
note In the following procedure, check the speaker or tweeter that is abnormal.

Q. Is the check result normal?
YES (normal for all) : 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 (abnormal for all) : Check the radio and CD player power supply and earth circuit, and repair if necessary. If the radio and CD player power supply and earth circuit is normal, replace the radio and CD player.
NO (Either a speaker is abnormal) : Go to Step 3.

STEP 3. Connector check: E-12 <front-LH>, E-10 <front-RH>, E-22 <rear-LH> or E-21 <rear-RH> door speaker connector, E-02 <LH>, E-04 <RH> tweeter connector

Q. Is the check result normal?
Go to Step 4.
Repair the defective connector.

STEP 4. 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. Is the check result normal?
Go to Step 5.
Replace the speaker or tweeter.

STEP 5. Connector check: C-103 radio and CD player connector.

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

STEP 6. Check the wire harness between the speaker or tweeter connector terminal and the radio and CD player connector terminal.
Check the communication lines for open circuit or short circuit.

  • <Front door speaker (LH)> Check the wire harness between E-12 front door speaker (LH) connector terminal No.1, 2 and C-103 radio and CD player connector terminal No.28, 38.
    note Prior to the wiring harness inspection, check intermediate connector C-125 and joint connector C-39, and repair if necessary.
  • <Front door speaker (RH)> Check the wire harness between E-10 front door speaker (RH) connector terminal No.1, 2 and C-103 radio and CD player connector terminal No.26, 36.
    note Prior to the wiring harness inspection, check intermediate connector C-111 and joint connector C-39, and repair if necessary.
  • <Rear door speaker (LH)> Check the wire harness between E-22 rear door speaker (LH) connector terminal No.1, 2 and C-103 radio and CD player connector terminal No.27, 37.
    note Prior to the wiring harness inspection, check intermediate connectors C-28 and D-21, and repair if necessary.
  • <Rear door speaker (RH)> Check the wire harness between E-21 rear door speaker (RH) connector terminal No.1, 2 and C-103 radio and CD player connector terminal No.25, 35.
    note Prior to the wiring harness inspection, check intermediate connectors C-16 and D-01, and repair if necessary.
  • <Tweeter (LH)> Check the wire harness between E-02 tweeter (LH) connector terminal No.1, 2 and C-103 radio and CD player connector terminal No.38, 28.
    note Prior to the wiring harness inspection, check intermediate connector C-126 and joint connector C-39, and repair if necessary.
  • <Tweeter (RH)> Check the wire harness between E-04 tweeter (RH) connector terminal No.1, 2 and C-103 radio and CD player connector terminal No.36, 26.
    note Prior to the wiring harness inspection, check intermediate connector C-112 and joint connector C-39, and repair if necessary.

Q. Is the check result normal?
Replace the radio and CD player.
Repair the wiring harness.