Inspection Procedure 4

No Sound from One Speaker.

Part 1:

Part 2:

CIRCUIT OPERATION
The sound signals are sent from the audio amplifier. After the signals are amplified and filtered, the sound signals are sent to the speaker.

TECHNICAL DESCRIPTION (COMMENT)
The cause is probably a faulty speaker circuit system.

TROUBLESHOOTING HINTS
- Malfunction of the speaker
- Damaged wiring harness or connector
- Malfunction of the audio amplifier

DIAGNOSIS

STEP 1. Check which speaker has no sound on the vehicles with seven speakers.
Determine which speaker does not sound.

Q: Which speaker does not sound?
Tweeter (LH) : Go to Step 2.
Tweeter (RH) : Go to Step 5.
Front door speaker (LH): Go to Step 8.
Front door speaker (RH): Go to Step 11.
Rear door speaker (LH): Go to Step 14.
Rear door speaker (RH): Go to Step 17.
Woofer : Go to Step 20.

STEP 2. Check the tweeter (LH).




1. Remove the tweeter (LH).
2. Check that the tweeter (LH) generates noise when a five-volt voltage is applied on the tweeter (LH) terminal.

Q: Is the tweeter (LH) generating noise?

YES: Go to Step 3.

NO: Replace the tweeter (LH). The tweeter (LH) should sound.




STEP 3. Check tweeter (LH) connector D-29 and audio amplifier connector D-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are harness connectors D-29 and D-41 in good condition?

YES: Go to Step 4.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. The tweeter (LH) should sound.







STEP 4. Check the wiring harness between tweeter (LH) connector D-29 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 3 and 11).

NOTE: Also check intermediate connector C-18 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-18 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between tweeter (LH) connector D-29 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 3 and 11) in good condition?

YES: Replace the audio amplifier. The tweeter (LH) should sound.

NO: Repair the wiring harness. The tweeter (LH) should sound.

STEP 5. Check the tweeter (RH).




1. Remove the tweeter (RH).
2. Check that the tweeter (RH) generates noise when a five-volt voltage is applied on the tweeter (RH) terminal.

Q: Is the tweeter (RH) generating noise?

YES: Go to Step 6.

NO: Replace the tweeter (RH). The tweeter (RH) should sound.




STEP 6. Check tweeter (RH) connector D-30 and audio amplifier connector D-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are harness connectors D-30 and D-41 in good condition?

YES: Go to Step 7.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. The tweeter (RH) should sound.







STEP 7. Check the wiring harness between tweeter (RH) connector D-30 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 4 and 12).

NOTE: Also check intermediate connector C-109 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-109 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between tweeter (RH) connector D-30 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 4 and 12) in good condition?

YES: Replace the audio amplifier. The tweeter (RH) should sound.

NO: Repair the wiring harness. The tweeter (RH) should sound.

STEP 8. Check the front door speaker (LH).




1. Remove the front door speaker (LH).
2. Check that the front door speaker (LH) generates noise when a five-volt voltage is applied on the front door speaker (LH) terminal.

Q: Is the front door speaker (LH) generating noise?

YES: Go to Step 9.

NO: Replace the front door speaker (LH). The front door speaker (LH) should sound.







STEP 9. Check front door speaker (LH) connector E-06 and audio amplifier connector D-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are harness connectors E-06 and D-41 in good condition?

YES: Go to Step 10.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. The front door speaker (LH) should sound.










STEP 10. Check the wiring harness between front door speaker (LH) connector E-06 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 13 and 14).

NOTE: Also check intermediate connector C-17 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-17 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between front door speaker (LH) connector E-06 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 13 and 14) in good condition?

YES: Replace the audio amplifier. The front door speaker (LH)should sound.

NO: Repair the wiring harness. The front door speaker (LH)should sound.

STEP 11. Check the front door speaker (RH).




1. Remove the front door speaker (RH).
2. Check that the front door speaker (RH) generates noise when a five-volt voltage is applied on the front door speaker (RH) terminal.

Q: Is the front door speaker (RH) generating noise?

YES: Go to Step 12.

NO: Replace the front door speaker (RH). The front door speaker (RH) should sound.







STEP 12. Check front door speaker (RH) connector E-13 and audio amplifier connector D-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are harness connectors E-13 and D-41 in good condition?

YES: Go to Step 13.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. The front door speaker (RH) should sound.










STEP 13. Check the wiring harness between front door speaker (RH) connector E-13 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 5 and 15).

NOTE: Also check intermediate connector C-110 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-110 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between front door speaker (RH) connector E-13 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 5 and 15) in good condition?

YES: Replace the audio amplifier. The front door speaker (RH) should sound.

NO: Repair the wiring harness. The front door speaker (RH) should sound.

STEP 14. Check the rear door speaker (LH).




1. Remove the rear door speaker (LH).
2. Check that the rear door speaker (LH) generates noise when a five-volt voltage is applied on the rear door speaker (LH) terminal.

Q: Is the rear door speaker (LH) generating noise?

YES: Go to Step 15.

NO: Replace the rear door speaker (LH). The rear door speaker (LH) should sound.







STEP 15. Check rear door speaker (LH) connector F-01 and audio amplifier connector D-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are harness connectors F-01 and D-41 in good condition?

YES: Go to Step 16.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. The rear door speaker (LH) should sound.










STEP 16. Check the wiring harness between rear door speaker (LH) connector F-01 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 2 and 10).

NOTE: Also check intermediate connector C-127 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-127 is damaged, repair or replace the connectors as described in Harness Connector Inspection.

Q: Is the wiring harness between the rear door speaker (LH) connector F-01 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 2 and 10) in good condition?

YES: Replace the audio amplifier. The rear door speaker (LH) should sound.

NO: Repair the wiring harness. The rear door speaker (LH) should sound.

STEP 17. Check the rear door speaker (RH).




1. Remove the rear door speaker (RH).
2. Check that the rear door speaker (RH) generates noise when a five-volt voltage is applied on the rear door speaker (RH) terminal.

Q: Is the rear door speaker (RH) generating noise?

YES: Go to Step 18.

NO: Replace the rear door speaker (RH). The rear door speaker (RH) should sound.







STEP 18. Check rear door speaker (RH) connector F-07 and audio amplifier connector D-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are harness connectors F-07 and D-41 in good condition?

YES: Go to Step 19.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. The rear door speaker (RH) should sound.










STEP 19. Check the wiring harness between rear door speaker (RH) connector F-07 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 1 and 9).

NOTE: Also check intermediate connector C-112 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-112 is damaged, repair or replace the connectors as described in Harness Connector Inspection.

Q: Is the wiring harness between rear door speaker (RH) connector F-07 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 1 and 9) in good condition?

YES: Replace the audio amplifier. The rear door speaker (RH) should sound.

NO: Repair the wiring harness. The rear door speaker (RH) should sound.

STEP 20. Check the woofer.




1. Remove the woofer.
2. Check that the woofer generates noise when a five-volt voltage is applied on the woofer terminal.

Q: Is the woofer generating noise?

YES: Go to Step 21.

NO: Replace the woofer. The woofer should sound.







STEP 21. Check woofer connector F-21 and audio amplifier connector D-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are harness connectors F-21 and D-41 in good condition?

YES: Go to Step 22.

NO: Repair or replace the damaged component(s). Refer to Harness Connector Inspection. The woofer should sound.










STEP 22. Check the wiring harness between woofer connector F-21 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 8 and 18).

NOTE: Also check intermediate connector C-112 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-112 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between woofer connector F-21 (terminals 1 and 2) and audio amplifier connector D-41 (terminals 8 and 18) in good condition?

YES: Replace the audio amplifier. The woofer should sound.

NO: Repair the wiring harness. The woofer should sound.