Inspection Procedure 3: No Sound is Heard from one of the Speakers. <Vehicles with Audio Amplifier>




















COMMENTS ON TROUBLE SYMPTOM


If the sound is not heard from one of the speakers, the speaker, audio visual navigation unit, audio amplifier, communication line from the audio visual navigation unit to the audio amplifier, or communication line from the audio amplifier to the speaker may have a problem. Also, the option coding information may be inconsistent.

PROBABLE CAUSES



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 Table ).
(2)Check that the "Speaker" is set to "Premium."

Q. Is the check result normal?
Go to Step 2.
Operate the M.U.T.-III to set the option coding "Speaker" to "Premium," 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, tweeter or subwoofer 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) : Refer to Inspection Procedure 2 "No sound is heard" .
NO (Either a speaker, a tweeter or a subwoofer is abnormal) : Go to Step 3.

STEP 3. Connector check: E-16 <front-LH>, E-04 <front-RH>, F-18 <rear-LH> or E-23 <rear-RH> door speaker connector, E-13 <LH>, E-02 <RH> tweeter connector, D-17 subwoofer connector

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

STEP 4. Check the speaker, tweeter or subwoofer.
(1)Remove the speaker, tweeter or subwoofer. 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. <speaker or tweeter>
(3)Check that the subwoofer outputs the noise when the voltage of 5 V is applied to the subwoofer connector terminal. <subwoofer>

Q. Is the check result normal?
Go to Step 5.
Replace the speaker, tweeter or subwoofer.

STEP 5. Connector check: D-125 <front door speaker or sub woofer>, D-126 <tweeter or rear door speaker> audio amplifier 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 audio amplifier connector terminal.
Check the communication lines for open circuit.

  • <Front door speaker (LH)> Check the wire harness between E-16 front door speaker (LH) connector terminal No.1, 2 and D-125 audio amplifier connector terminal No.28, 38.
    note Prior to the wiring harness inspection, check intermediate connectors C-24, C-128 <LH drive vehicles> and C-113 <RH drive vehicles>, and repair if necessary.
  • <Front door speaker (RH)> Check the wire harness between E-04 front door speaker (RH) connector terminal No.1, 2 and D-125 audio amplifier connector terminal No.27, 37.
    note Prior to the wiring harness inspection, check intermediate connectors C-24, C-113 <LH drive vehicles> and C-128 <RH drive vehicles>, and repair if necessary.
  • <Rear door speaker (LH)> Check the wire harness between E-23 rear door speaker (LH) connector terminal No.1, 2 and D-126 audio amplifier connector terminal No.1, 7.
    note Prior to the wiring harness inspection, check intermediate connector D-23, and repair if necessary.
  • <Rear door speaker (RH)> Check the wire harness between E-09 rear door speaker (RH) connector terminal No.1, 2 and D-126 audio amplifier connector terminal No.2, 8.
    note Prior to the wiring harness inspection, check intermediate connectors D-36, and repair if necessary.
  • <Tweeter (LH)> Check the wire harness between E-13 tweeter (LH) connector terminal No.1, 2 and D-126 audio amplifier connector terminal No.14, 6.
    note Prior to the wiring harness inspection, check intermediate connectors C-22, C-129 <LH drive vehicles> and C-114 <RH drive vehicles>, and repair if necessary.
  • <Tweeter (RH)> Check the wire harness between E-02 tweeter (RH) connector terminal No.1, 2 and D-126 audio amplifier connector terminal No.13, 5.
    note Prior to the wiring harness inspection, check intermediate connectors C-22, C-114 <LH drive vehicles> and C-129 <RH drive vehicles>, and repair if necessary.
  • <Subwoofer> Check the wire harness between D-17 subwoofer connector terminal No.1, 2, 3, 4 and D-125 audio amplifier connector terminal No.30, 22, 29, 21.

Q. Is the check result normal?
YES <front door speaker> : Go to Step 7.
YES <except front door speaker> : Go to Step 9.
NO (harness wire is abnormal) : Repair the wiring harness.

STEP 7. Connector check: C-11 audio visual navigation unit connector

Q. Is the check result normal?
Go to Step 8.
Repair the defective connector.

STEP 8. Check the harness wire between C-11 audio visual navigation unit connector terminal No.3, 7, 12, 15 and D-126 audio amplifier connector No.12, 11, 4, 15.

  • Check the communication lines for open circuit.
note Prior to the wiring harness inspection, check intermediate connectors C-19 and C-22, and repair if necessary.

Q. Is the check result normal?
Check the trouble symptom, go to Step 9.
Repair the wiring harness.

STEP 9. Replace the audio amplifier temporarily, and check the trouble symptom.
Replace the audio amplifier temporarily, and check that the sound is output from the speaker.

Q. Is the check result normal?
Replace the audio amplifier.
Replace the audio visual navigation unit.