Inspection Procedure 7
INSPECTION PROCEDURE 7: No Sound from One Speaker. [Vehicles with audio amplifierPart 1:
Part 2:
Part 3:
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 audio amplifier. 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) [Vehicles without Mitsubishi multi communication system] : Go to Step 8.
Front door speaker (LH) [Vehicles with Mitsubishi multi communication system] : Carry out the troubleshooting for the navigation unit - Only the front left speaker does not sound (including the audio sound).
Front door speaker (RH) : Go to Step 11.
Rear speaker (LH) [only the bass tone does not sound.] : Go to Step 14.
Rear speaker (RH) [only the bass tone does not sound.] : Go to Step 17.
Rear speaker (LH) [only the high tone does not sound.] : Go to Step 20.
Rear speaker (RH) [only the high tone does not sound.] : Go to Step 23.
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 C-130 and radio, CD player and CD changer connector C-111 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are harness connectors C-130 and C-111 in good condition?
YES : Go to Step 4.
NO : Repair or replace the component(s). The tweeter (LH) should sound.
STEP 4. Check the wiring harness between tweeter (LH) connector C-130 (terminals 2 and 1) and radio, CD player and CD changer connector C-111 (terminals 5 and 13).
- Check the wiring harness for open circuit and short circuit.
Q: Is the wiring harness between tweeter (LH) connector C-130 (terminals 2 and 1) and radio, CD player and CD changer connector C-111 (terminals 5 and 13) in good condition?
YES : Replace the radio, CD player and CD changer. 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 C-109 and audio radio, CD player and CD changer connector C-111 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are harness connectors C-109 and C-111 in good condition?
YES : Go to Step 7.
NO : Repair or replace the component(s). The tweeter (RH) should sound.
STEP 7. Check the wiring harness between tweeter (RH) connector C-109 (terminals 2 and 1) and radio, CD player and CD changer connector C-111 (terminals 6 and 14).
- Check the wiring harness for open circuit and short circuit.
Q: Is the wiring harness between tweeter (RH) connector C-109 (terminals 2 and 1) and radio, CD player and CD changer connector C-111 (terminals 6 and 14) in good condition?
YES : Replace the radio, CD player and CD changer. 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-10 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are harness connectors E-10 and C-113 in good condition?
YES : Go to Step 10.
NO : Repair or replace the component(s). The front door speaker (LH) should sound.
STEP 10. Check the wiring harness between front door speaker (LH) connector E-10 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 8 and 18).
- Check the wiring harness for open circuit and short circuit.
NOTE: Also check intermediate connector C-26 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-26 is damaged, repair or replace the connector.
Q: Is the wiring harness between front door speaker (LH) connector E-10 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 8 and 18) 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-02 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are harness connectors E-02 and C-113 in good condition?
YES : Go to Step 13.
NO : Repair or replace the component(s). The front door speaker (RH) should sound.
STEP 13. Check the wiring harness between front door speaker (RH) connector E-02 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 7 and 17).
- Check the wiring harness for open circuit and short circuit.
NOTE: Also check intermediate connector C-12 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-12 is damaged, repair or replace the connector.
Q: Is the wiring harness between front door speaker (RH) connector E-02 (terminals 1 and 2) and audio amplifier connector C-113 (terminals 7 and 17) 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 speaker (LH).
1. Remove the rear speaker (LH).
2. Check that the rear speaker (LH) generates noise when a five-volt voltage is applied on the rear speaker (LH) terminal 2 and 3.
Q: Is the rear speaker (LH) generating noise?
YES : Go to Step 15.
NO : Replace the rear speaker (LH). The rear speaker (LH) should sound.
STEP 15. Check rear speaker (LH) connector D-46 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are harness connectors D-12 and C-113 in good condition?
YES : Go to Step 16.
NO : Repair or replace the damaged component(s). The rear speaker (LH) should sound.
STEP 16. Check the wiring harness between rear speaker (LH) connector D-46 (terminals 2 and 3) and audio amplifier connector C-113 (terminals 1 and 9).
- Check the wiring harness for open circuit and short circuit.
NOTE: Also check intermediate connector C-28 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-28 is damaged, repair or replace the connectors.
Q: Is the wiring harness between the rear speaker (LH) connector D-46 (terminals 2 and 3) and audio amplifier connector C-113 (terminals 1 and 9) in good condition?
YES : Replace the audio amplifier. The rear speaker (LH) should sound.
NO : Repair the wiring harness. The rear speaker (LH) should sound.
STEP 17. Check the rear speaker (RH).
1. Remove the rear speaker (RH).
2. Check that the rear speaker (RH) generates noise when a five-volt voltage is applied on the rear speaker (RH) terminal 2 and 3.
Q: Is the rear speaker (RH) generating noise?
YES : Go to Step 18.
NO : Replace the rear speaker (RH). The rear speaker (RH) should sound.
STEP 18. Check rear speaker (RH) connector D-43 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are harness connectors D-43 and C-113 in good condition?
YES : Go to Step 19.
NO : Repair or replace the component(s). The rear speaker (RH) should sound.
STEP 19. Check the wiring harness between rear speaker (RH) connector D-43 (terminals 2 and 3) and audio amplifier connector C-113 (terminals 2 and 10).
- Check the wiring harness for open circuit and short circuit.
NOTE: Also check intermediate connector C-13 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-13 is damaged, repair or replace the connectors.
Q: Is the wiring harness between rear speaker (RH) connector D-43 (terminals 2 and 3) and audio amplifier connector C-113 (terminals 2 and 10) in good condition?
YES : Replace the audio amplifier. The rear speaker (RH) should sound.
NO : Repair the wiring harness. The rear speaker (RH) should sound.
STEP 20. Check the rear speaker (LH).
1. Remove the rear speaker (LH).
2. Check that the rear speaker (LH) generates noise when a five-volt voltage is applied on the rear speaker (LH) terminal 1 and 4.
Q: Is the rear speaker (LH) generating noise?
YES : Go to Step 21.
NO : Replace the rear speaker (LH). The rear speaker (LH) should sound.
STEP 21. Check rear speaker (LH) connector D-46 and radio, CD player and CD changer connectors C-111 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are harness connectors D-46 and C-111 in good condition?
YES : Go to Step 22.
NO : Repair or replace the damaged component(s). The rear speaker (LH) should sound.
STEP 22. Check the wiring harness between rear speaker (LH) connector D-46 (terminals 1 and 4) and radio, CD player and CD changer connector C-111 (terminals 2 and 8).
- Check the wiring harness for open circuit and short circuit.
NOTE: Also check intermediate connector C-28 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-28 is damaged, repair or replace the connectors.
Q: Is the wiring harness between the rear speaker (LH) connector D-46 (terminals 1 and 4) and audio amplifier connector C-113 (terminals 2 and 8) in good condition?
YES : Replace the radio, CD player and CD changer. The rear speaker (LH) should sound.
NO : Repair the wiring harness. The rear speaker (LH) should sound.
STEP 23. Check the rear speaker (RH).
1. Remove the rear speaker (RH).
2. Check that the rear speaker (RH) generates noise when a five-volt voltage is applied on the rear speaker (RH) terminal 1 and 4.
Q: Is the rear speaker (RH) generating noise?
YES : Go to Step 24.
NO : Replace the rear speaker (RH). The rear speaker (RH) should sound.
STEP 24. Check rear speaker (RH) connector D-43 and audio amplifier connector C-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are harness connectors D-43 and C-113 in good condition?
YES : Go to Step 25.
NO : Repair or replace the component(s). The rear speaker (RH) should sound.
STEP 25. Check the wiring harness between rear speaker (RH) connector D-43 (terminals 1 and 4) and radio, CD player and CD changer connector C-111 (terminals 1 and 7).
- Check the wiring harness for open circuit and short circuit.
NOTE: Also check intermediate connector C-13 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-13 is damaged, repair or replace the connectors.
Q: Is the wiring harness between rear speaker (RH) connector D-43 (terminals 1 and 4) and radio, CD player and CD changer connector C-111 (terminals 1 and 7) in good condition?
YES : Replace the radio, CD player and CD changer radio, CD player and CD changer. The rear speaker (RH) should sound.
NO : Repair the wiring harness. The rear speaker (RH) should sound.