AUDIO AND VISUAL SYSTEM Speaker Circuit

DESCRIPTION

The sound signal that has been amplified by the stereo component amplifier is sent to the speakers from the stereo component amplifier through this circuit.

If there is a short in this circuit, the stereo component amplifier detects it and stops output to the speakers.

Thus, sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier or speakers.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR

   
   

   1. 

      Disconnect the connectors shown in the illustration from the stereo component amplifier and speakers.

   2. w/ Front Center Speaker

      Measure the resistance between the front stereo component speaker and the stereo component amplifier to check for an open and short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition P28-3 (CTR+) - K2-1 Always Below 1 Ω P28-9 (CTR-) - K2-2 Always Below 1 Ω P28-3 (CTR+) - Body ground Always 10 kΩ or higher P28-9 (CTR-) - Body ground Always 10 kΩ or higher

   3. Measure the resistance between each of the front No. 3 speakers and the stereo component amplifier to check for an open and short circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition P29-2 (FL+) - M4-1 (TWL+) Always Below 1 Ω P29-6 (FL-) - M4-3 (TWL-) Always Below 1 Ω P29-8 (FR+) - L2-1 (TWR+) Always Below 1 Ω P29-7 (FR-) - L2-3 (TWR-) Always Below 1 Ω P29-2 (FL+) - Body ground Always 10 kΩ or higher P29-6 (FL-) - Body ground Always 10 kΩ or higher P29-8 (FR+) - Body ground Always 10 kΩ or higher P29-7 (FR-) - Body ground Always 10 kΩ or higher

   4. Measure the resistance between each of the front No. 2 speakers and the front No. 3 speakers to check for an open and short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition M12-1 - M4-2 (+) Always Below 1 Ω M12-2 - M4-4 (-) Always Below 1 Ω L5-1 - L2-2 (+) Always Below 1 Ω L5-2 - L2-4 (-) Always Below 1 Ω M12-1 - Body ground Always 10 kΩ or higher M12-2 - Body ground Always 10 kΩ or higher L5-1 - Body ground Always 10 kΩ or higher L5-2 - Body ground Always 10 kΩ or higher

   5. 

      w/o Front Center Speaker

      Measure the resistance between each of the rear speakers and the stereo component amplifier to check for an open and short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition P29-3 (RL+) - O3-1 Always Below 1 Ω P29-9 (RL-) - O3-2 Always Below 1 Ω P29-4 (RR+) - N3-1 Always Below 1 Ω P29-10 (RR-) - N3-2 Always Below 1 Ω P29-3 (RL+) - Body ground Always 10 kΩ or higher P29-9 (RL-) - Body ground Always 10 kΩ or higher P29-4 (RR+) - Body ground Always 10 kΩ or higher P29-10 (RR-) - Body ground Always 10 kΩ or higher

   6. w/ Front Center Speaker

      Measure the resistance between each of the rear speakers and the stereo component amplifier to check for an open and short circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition P29-3 (RL+) - O5-1 (+) Always Below 1 Ω P29-9 (RL-) - O5-3 (-) Always Below 1 Ω P29-4 (RR+) - N5-1 (+) Always Below 1 Ω P29-10 (RR-) - N5-3 (-) Always Below 1 Ω P29-3 (RL+) - Body ground Always 10 kΩ or higher P29-9 (RL-) - Body ground Always 10 kΩ or higher P29-4 (RR+) - Body ground Always 10 kΩ or higher P29-10 (RR-) - Body ground Always 10 kΩ or higher

   7. w/o Front Center Speaker

      Measure the resistance between each of the rear No. 3 speakers and the stereo component amplifier to check for an open and short circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition P28-8 (ML+) - O4-1 (+) Always Below 1 Ω P28-7 (ML-) - O4-3 (-) Always Below 1 Ω P28-3 (MR+) - N4-1 (+) Always Below 1 Ω P28-9 (MR-) - N4-3 (-) Always Below 1 Ω P28-8 (ML+) - Body ground Always 10 kΩ or higher P28-7 (ML-) - Body ground Always 10 kΩ or higher P28-3 (MR+) - Body ground Always 10 kΩ or higher P28-9 (MR-) - Body ground Always 10 kΩ or higher

   8. w/o Front Center Speaker

      Measure the resistance between each of the rear No. 2 speakers and the rear No. 3 speakers to check for an open and short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition O6-1 - O4-2 (+TW) Always Below 1 Ω O6-2 - O4-4 (-TW) Always Below 1 Ω N6-1 - N4-2 (+TW) Always Below 1 Ω N6-2 - N4-4 (-TW) Always Below 1 Ω O6-1 - Body ground Always 10 kΩ or higher O6-2 - Body ground Always 10 kΩ or higher N6-1 - Body ground Always 10 kΩ or higher N6-2 - Body ground Always 10 kΩ or higher

   9. w/ Front Center Speaker

      Measure the resistance between each of the rear No. 2 speakers and the rear speakers to check for an open and short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition O2-1 - O5-2 (+TW) Always Below 1 Ω O2-2 - O5-4 (-TW) Always Below 1 Ω N2-1 - N5-2 (+TW) Always Below 1 Ω N2-2 - N5-4 (-TW) Always Below 1 Ω O2-1 - Body ground Always 10 kΩ or higher O2-2 - Body ground Always 10 kΩ or higher N2-1 - Body ground Always 10 kΩ or higher N2-2 - Body ground Always 10 kΩ or higher

   10. w/ Front Center Speaker

       Measure the resistance between each of the rear stereo component speakers and the stereo component amplifier to check for an open and short circuit in the wire harness.

       Standard Resistance
       Tester Connection Condition Specified Condition P28-8 (SL+) - Q22-1 Always Below 1 Ω P28-7 (SL-) - Q22-2 Always Below 1 Ω P28-2 (SR+) - Q26-1 Always Below 1 Ω P28-6 (SR-) - Q26-2 Always Below 1 Ω P28-8 (SL+) - Body ground Always 10 kΩ or higher P28-7 (SL-) - Body ground Always 10 kΩ or higher P28-2 (SR+) - Body ground Always 10 kΩ or higher P28-6 (SR-) - Body ground Always 10 kΩ or higher

   11. Measure the resistance between each of the front No. 1 speakers and the stereo component amplifier to check for an open and short circuit in the wire harness.

       Standard Resistance
       Tester Connection Condition Specified Condition P28-4 (WFL+) - M13-1 Always Below 1 Ω P28-10 (WFL-) - M13-2 Always Below 1 Ω P29-1 (WFR+) - L1-1 Always Below 1 Ω P29-5 (WFR-) - L1-2 Always Below 1 Ω P28-4 (WFL+) - Body ground Always 10 kΩ or higher P28-10 (WFL-) - Body ground Always 10 kΩ or higher P29-1 (WFR+) - Body ground Always 10 kΩ or higher P29-5 (WFR-) - Body ground Always 10 kΩ or higher

   12. w/ Front Center Speaker

       Measure the resistance between the woofer box speaker and the stereo component amplifier to check for an open and short circuit in the wire harness.

       Standard Resistance
       Tester Connection Condition Specified Condition P28-1 (WF1+) - P21-3 (WF1+) Always Below 1 Ω P28-5 (WF1-) - P21-4 (WF1-) Always Below 1 Ω P28-1 (WF1+) - Body ground Always 10 kΩ or higher P28-5 (WF1-) - Body ground Always 10 kΩ or higher

   13. w/o Front Center Speaker

       Measure the resistance between the woofer box speaker and the stereo component amplifier to check for an open and short circuit in the wire harness.

       Standard Resistance

       Tester Connection Condition Specified Condition P28-1 (WF1+) - P21-1 (WF1+) Always Below 1 Ω P28-5 (WF1-) - P21-3 (WF1-) Always Below 1 Ω P28-2 (WF2+) - P21-2 (WF2+) Always Below 1 Ω P28-6 (WF2-) - P21-4 (WF2-) Always Below 1 Ω P28-1 (WF1+) - Body ground Always 10 kΩ or higher P28-5 (WF1-) - Body ground Always 10 kΩ or higher P28-2 (WF2+) - Body ground Always 10 kΩ or higher P28-6 (WF2-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. INSPECT FRONT NO. 1 SPEAKER

   
   

   1. 

      Resistance check

      
      

      1. Measure the resistance according to the value(s) in the table below.

         Standard Resistance
         w/ Front Center Speaker Tester Connection Condition Specified Condition M13-1 - M13-2 Always 6 to 10 Ω L1-1 - L1-2 Always 6 to 10 Ω
         w/o Front Center Speaker Tester Connection Condition Specified Condition M13-1 - M13-2 Always 3.2 to 4.8 Ω L1-1 - L1-2 Always 3.2 to 4.8 Ω

   
   

   NG

   REPLACE FRONT NO. 1 SPEAKER Click here

   OK

3. INSPECT FRONT NO. 2 SPEAKER

   
   

   1. Check that the malfunction disappears when another speaker in good condition is installed.

      Standard
      Malfunction disappears.

      Tech Tips

      
      

      • Connect all the connectors to the front No. 2 speakers.

      • When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both LH and RH sides.

   
   

   NG

   INSPECT FRONT NO. 3 SPEAKER Click here

   OK

   REPLACE FRONT NO. 2 SPEAKER Click here

4. INSPECT FRONT NO. 3 SPEAKER

   
   

   1. Check that the malfunction disappears when another speaker in good condition is installed.

      Standard
      Malfunction disappears.

      Tech Tips

      
      

      • Connect all the connectors to the front speakers.

      • When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both LH and RH sides.

   
   

   NG

   INSPECT REAR NO. 2 SPEAKER Click here

   OK

   REPLACE FRONT NO. 3 SPEAKER Click here

5. INSPECT REAR NO. 2 SPEAKER

   
   

   1. Check that the malfunction disappears when another speaker in good condition is installed.

      Standard
      Malfunction disappears.

      Tech Tips

      
      

      • Connect all the connectors to the rear No. 2 speakers.

      • When there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both LH and RH sides.

   
   

   NG

   CONFIRM MODEL Click here

   OK

   REPLACE REAR NO. 2 SPEAKER Click here

6. CONFIRM MODEL

   Result
   Result Proceed to w/ Front Center Speaker A w/o Front Center Speaker B

   
   

   B

   INSPECT REAR NO. 3 SPEAKER Click here

   A

7. INSPECT REAR SPEAKER

   
   

   1. Check that the malfunction disappears when another speaker in good condition is installed.

      Standard
      Malfunction disappears.

      Tech Tips

      
      

      • Connect all the connectors to the rear speakers.

      • When there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both LH and RH sides.

   
   

   NG

   INSPECT REAR STEREO COMPONENT SPEAKER Click here

   OK

   REPLACE REAR SPEAKER Click here

8. INSPECT REAR STEREO COMPONENT SPEAKER

   
   

   1. Check that the malfunction disappears when another speaker in good condition is installed.

      OK
      Malfunction disappears.

      Tech Tips

      
      

      • Connect all the connectors to the rear stereo component speakers.

      • When there is a possibility that either the right or left rear speaker is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both LH and RH sides.

   
   

   NG

   INSPECT FRONT STEREO COMPONENT SPEAKER Click here

   OK

   REPLACE REAR STEREO COMPONENT SPEAKER Click here

9. INSPECT FRONT STEREO COMPONENT SPEAKER

   
   

   1. 

      Resistance check

      
      

      1. Measure the resistance according to the value(s) in the table below.

         Standard Resistance
         Tester Connection Condition Specified Condition K2-1 - K2-2 Always 7 to 9 Ω

   
   

   NG

   REPLACE FRONT STEREO COMPONENT SPEAKER Click here

   OK

10. INSPECT WOOFER BOX SPEAKER

    
    

    1. 

       Resistance check

       
       

       1. Measure the resistance according to the value(s) in the table below.

          Note

          The speaker should not be removed for checking.

          Standard Resistance
          Tester Connection Condition Specified Condition P21-3 (WF1+) - P21-4 (WF1-) Always 7 to 8.6 Ω

    
    

    NG

    REPLACE WOOFER BOX SPEAKER Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

11. INSPECT REAR NO. 3 SPEAKER

    
    

    1. Check that the malfunction disappears when another speaker in good condition is installed.

       Standard
       Malfunction disappears.

       Tech Tips

       
       

       • Connect all the connectors to the rear No. 3 speakers.

       • When there is a possibility that either the right or left rear No. 3 speaker is defective, inspect by interchanging the right one with the left one.

       • Perform the above inspection of both LH and RH sides.

    
    

    NG

    INSPECT REAR SPEAKER Click here

    OK

    REPLACE REAR NO. 3 SPEAKER Click here

12. INSPECT REAR SPEAKER

    
    

    1. 

       Resistance check

       
       

       1. Measure the resistance according to the value(s) in the table below.

          Standard Resistance
          Tester Connection Condition Specified Condition O3-1 - O3-2 Always 3.2 to 4.8 Ω N3-1 - N3-2 Always 3.2 to 4.8 Ω

    
    

    NG

    REPLACE REAR SPEAKER Click here

    OK

13. INSPECT WOOFER BOX SPEAKER

    
    

    1. 

       Resistance check

       
       

       1. Measure the resistance according to the value(s) in the table below.

          Note

          The speaker should not be removed for checking.

          Standard Resistance
          Tester Connection Condition Specified Condition P21-1 (WF1+) - P21-3 (WF1-) Always 1.6 to 2.4 Ω P21-2 (WF2+) - P21-4 (WF2-) Always 1.6 to 2.4 Ω

    
    

    NG

    REPLACE WOOFER BOX SPEAKER Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here