INSPECTION PROCEDURE 6: No sound from one speaker. < Vehicles without audio amplifier>: Diagnosis

Required Special Tools: 

• MB991223: Harness set
• MB992006: Extra Fine Probe

1. 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.

   Door speaker (LH) :  Go to Step  8.

   Door speaker (RH) :  Go to Step  11.

   Quarter speaker (LH) :  Go to Step  14.

   Quarter speaker (RH) :  Go to Step  17.

2. STEP 2. Check the tweeter (LH). 
   1. Remove the tweeter (LH). Refer to < TWEETER/DOOR SPEAKER/QUARTER SPEAKER> .
   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.

   Fig 1: Checking Speaker

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3. STEP 3. Check tweeter (LH) connector C-130 and radio and CD player connector C-117 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are harness connectors C-130 and C-117 in good condition? 

   YES:  Go to Step  4.

   NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . The tweeter (LH) should sound.

   Fig 2: Identifying Connector C-117 Terminals

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   Fig 3: Locating Tweeter (LH) Connector C-130

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4. STEP 4. Check the wiring harness between tweeter (LH) connector C-130 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 5 and 13). 

   Q: Is the wiring harness between tweeter (LH) connector C-130 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 5 and 13) in good condition? 

   YES:  The procedure is complete.

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

   Fig 4: Identifying Connector C-117 Terminals

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   Fig 5: Locating Tweeter (LH) Connector C-130

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5. STEP 5. Check the tweeter (RH). 
   1. Remove the tweeter (RH). Refer to < TWEETER/DOOR SPEAKER/QUARTER SPEAKER> .
   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.

   Fig 6: Checking Speaker

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6. STEP 6. Check tweeter (RH) connector C-110 and radio and CD player connector C-117 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are harness connectors C-110 and C-117 in good condition? 

   YES:  Go to Step  7.

   NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . The tweeter (RH) should sound.

   Fig 7: Locating Tweeter (RH) Connector C-110 And CD Player Connector C-117

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7. STEP 7. Check the wiring harness between tweeter (RH) connector C-110 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 6 and 14). 

   Q: Is the wiring harness between tweeter (RH) connector C-110 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 6 and 14) in good condition? 

   YES:  The procedure is complete.

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

   Fig 8: Locating Tweeter (RH) Connector C-110 And CD Player Connector C-117

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8. STEP 8. Check the door speaker (LH). 
   1. Remove the door speaker (LH). Refer to < TWEETER/DOOR SPEAKER/QUARTER SPEAKER> .
   2. Check that the door speaker (LH) generates noise when a five-volt voltage is applied on the door speaker (LH) terminal.

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

   YES:  Go to Step  9.

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

   Fig 9: Checking Speaker

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9. STEP 9. Check door speaker (LH) connector E-13 and radio and CD player connector C-117 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are harness connectors E-13 and C-117 in good condition? 

   YES:  Go to Step  10.

   NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . The door speaker (LH) should sound.

   Fig 10: Identifying Connector C-117 Terminals

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   Fig 11: Locating Door Speaker (LH) Connector E-13

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10. STEP 10. Check the wiring harness between door speaker (LH) connector E-13 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 5 and 13). 
    Fig 12: Identifying Connector C-117 Terminals

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    Fig 13: Locating Door Speaker (LH) Connector E-13

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    NOTE: Also check intermediate connector C-25 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-25 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-13 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 5 and 13) in good condition? 

    YES:  The procedure is complete.

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

    Fig 14: Locating Intermediate Connector C-25

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11. STEP 11. Check the door speaker (RH). 
    1. Remove the door speaker (RH). Refer to < TWEETER/DOOR SPEAKER/QUARTER SPEAKER> .
    2. Check that the door speaker (RH) generates noise when a five-volt voltage is applied on the door speaker (RH) terminal.

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

    YES:  Go to Step  12.

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

    Fig 15: Checking Speaker

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12. STEP 12. Check door speaker (RH) connector E-07 and radio and CD player connector C-117 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are harness connectors E-07 and C-117 in good condition? 

    YES:  Go to Step  13.

    NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . The door speaker (RH) should sound.

    Fig 16: Identifying Connector C-117 Terminals

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    Fig 17: Locating Door Speaker (RH) Connector E-07

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13. STEP 13. Check the wiring harness between door speaker (RH) connector E-07 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 6 and 14). 
    Fig 18: Locating Intermediate Connector C-09 And CD Player Connector C-117

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    Fig 19: Locating Door Speaker (RH) Connector E-07

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    NOTE: Also check intermediate connector C-09 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-09 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-07 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 6 and 14) in good condition? 

    YES:  The procedure is complete.

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

14. STEP 14. Check the quarter speaker (LH). 
    1. Remove the quarter speaker (LH). Refer to < TWEETER/DOOR SPEAKER/QUARTER SPEAKER> .
    2. Check that the quarter speaker (LH) generates noise when a five-volt voltage is applied on the quarter speaker (LH) terminal.

    Q: Is the quarter speaker (LH) generating noise? 

    YES:  Go to Step  15.

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

    Fig 20: Checking Speaker

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15. STEP 15. Check quarter speaker (LH) connector D-14 and radio and CD player connector C-117 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are harness connectors D-14 and C-117 in good condition? 

    YES:  Go to Step  16.

    NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . The quarter speaker (LH) should sound.

    Fig 21: Identifying Connector C-117 Terminals

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    Fig 22: Locating Quarter Speaker (LH) Connector D-14

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16. STEP 16. Check the wiring harness between quarter speaker (LH) connector D-14 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 2 and 8). 
    Fig 23: Identifying Connector C-117 Terminals

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    Fig 24: Locating Quarter Speaker (LH) Connector D-14

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    NOTE: Also check intermediate connector C-23 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-23 is damaged, repair or replace the connectors as described in HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between the rear speaker (LH) connector D-14 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 2 and 8) in good condition? 

    YES:  Replace the radio and CD player. The quarter speaker (LH) should sound.

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

    Fig 25: Identifying Connector C-23 Terminals

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17. STEP 17. Check the quarter speaker (RH). 
    1. Remove the quarter speaker (RH). Refer to < TWEETER/DOOR SPEAKER/QUARTER SPEAKER> .
    2. Check that the quarter speaker (RH) generates noise when a five-volt voltage is applied on the quarter speaker (RH) terminal.

    Q: Is the quarter speaker (RH) generating noise? 

    YES:  Go to Step  18.

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

    Fig 26: Checking Speaker

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18. STEP 18. Check quarter speaker (RH) connector D-05 and radio and CD player connector C-117 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are harness connectors D-05 and C-117 in good condition? 

    YES:  Go to Step  19.

    NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . The quarter speaker (RH) should sound.

    Fig 27: Identifying Connector C-117 Terminals

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    Fig 28: Locating Quarter Speaker (RH) Connector D-05

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19. STEP 19. Check the wiring harness between rear speaker (RH) connector D-05 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 1 and 7). 
    Fig 29: Locating CD Player Connector C-117 And Intermediate Connector C-11

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    Fig 30: Locating Rear Speaker (RH) Connector D-05

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    NOTE: Also check intermediate connector C-11 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-11 is damaged, repair or replace the connectors as described in HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between rear speaker (RH) connector D-05 (terminals 1 and 2) and radio and CD player connector C-117 (terminals 1 and 7) in good condition? 

    YES:  Replace the radio and CD player. The quarter speaker (RH) should sound.

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