AUDIO AND VISUAL SYSTEM Speaker Circuit

DESCRIPTION

for 6 Speakers:

• If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers.

• Thus sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly or speakers.

• If a short is detected in a speaker circuit, no sound can be heard from the speakers.

for 8 Speakers:

• If there is a short in a speaker circuit, the stereo component amplifier assembly 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 assembly or speakers.

• If a short is detected in a speaker circuit, no sound can be heard from the speakers.

WIRING DIAGRAM

1. for 6 Speakers

   

2. for 8 Speakers

   

   

INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM MODEL

   Result
   Result Proceed to for 6 Speakers A for 8 Speakers B

   
   

   B

   CHECK HARNESS AND CONNECTOR Click here

   A

2. CHECK HARNESS AND CONNECTOR

   
   

   1. Disconnect the L109 and L110 radio and display receiver assembly connectors.

   2. Disconnect the N1 and O1 front No. 1 speaker assembly connectors.

   3. Disconnect the I2 and I3 front No. 2 speaker assembly connectors.

   4. Disconnect the P3 and Q3 rear speaker assembly connectors.

   5. Measure the resistance between each of the front No. 2 speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L109-1 (FR+) - I2-2 (+) Always Below 1 Ω L109-5 (FR-) - I2-4 (-) Always Below 1 Ω L109-2 (FL+) - I3-2 (+) Always Below 1 Ω L109-6 (FL-) - I3-4 (-) Always Below 1 Ω

   6. Measure the resistance between each of the front No. 1 speaker assemblies and the front No. 2 speaker assemblies to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition I2-1 (+) - N1-1 Always Below 1 Ω I2-3 (-) - N1-2 Always Below 1 Ω I3-1 (+) - O1-1 Always Below 1 Ω I3-3 (-) - O1-2 Always Below 1 Ω

   7. Measure the resistance between each of the rear speaker assemblies and the radio and display receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L110-1 (RR+) - P3-1 Always Below 1 Ω L110-3 (RR-) - P3-2 Always Below 1 Ω L110-2 (RL+) - Q3-1 Always Below 1 Ω L110-6 (RL-) - Q3-2 Always Below 1 Ω

   8. Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection Condition Specified Condition L109-1 (FR+) - Body ground Always 10 kΩ or higher L109-5 (FR-) - Body ground Always 10 kΩ or higher L109-2 (FL+) - Body ground Always 10 kΩ or higher L109-6 (FL-) - Body ground Always 10 kΩ or higher L110-1 (RR+) - Body ground Always 10 kΩ or higher L110-3 (RR-) - Body ground Always 10 kΩ or higher L110-2 (RL+) - Body ground Always 10 kΩ or higher L110-6 (RL-) - Body ground Always 10 kΩ or higher

   9. Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition I2-1 (+) - Body ground Always 10 kΩ or higher I2-3 (-) - Body ground Always 10 kΩ or higher I3-1 (+) - Body ground Always 10 kΩ or higher I3-3 (-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

   
   

   1. Resistance check

      
      
      1. 

         Text in Illustration

         *A	for RH
         *B	for LH
         *a	Component without harness connected (Front No. 1 Speaker Assembly)

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

         Standard Resistance
         Tester Connection Condition Specified Condition N1-1 - N1-2 Always 3.2 to 4.8 Ω O1-1 - O1-2 Always 3.2 to 4.8 Ω

   
   

   NG

   REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

   OK

4. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

   
   

   1. Resistance check

      
      
      1. 

         Text in Illustration

         *A	for RH
         *B	for LH
         *a	Component without harness connected (Front No. 2 Speaker Assembly)

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

         Standard Resistance
         Tester Connection Condition Specified Condition I2-2 (+) - I2-4 (-) Always 10 kΩ or higher I2-1 (+) - I2-2 (+) Always Below 1 Ω I2-3 (-) - I2-4 (-) Always Below 1 Ω I3-2 (+) - I3-4 (-) Always 10 kΩ or higher I3-1 (+) - I3-2 (+) Always Below 1 Ω I3-3 (-) - I3-4 (-) Always Below 1 Ω

   
   

   NG

   REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

   OK

5. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

   
   

   1. Check that the malfunction disappears when a known good speaker is installed Click here.

      OK
      Malfunction disappears.

      Tech Tips

      
      

      • Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.

      • 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 SPEAKER ASSEMBLY Click here

   OK

   END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

6. INSPECT REAR SPEAKER ASSEMBLY

   
   

   1. Resistance check

      
      
      1. 

         Text in Illustration

         *A	for RH
         *B	for LH
         *a	Component without harness connected (Rear Speaker Assembly)

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

         Standard Resistance
         Tester Connection Condition Specified Condition P3-1 - P3-2 Always 3.2 to 4.8 Ω Q3-1 - Q3-2 Always 3.2 to 4.8 Ω

   
   

   NG

   REPLACE REAR SPEAKER ASSEMBLY Click here

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

7. CHECK HARNESS AND CONNECTOR

   
   

   1. Disconnect the L68 stereo component amplifier assembly connector.

   2. Disconnect the N1 and O1 front No. 1 speaker assembly connectors.

   3. Disconnect the I4 and I5 front No. 2 speaker assembly connectors.

   4. Disconnect the P3 and Q3 rear speaker assembly connectors.

   5. Disconnect the P6 and Q6 rear No. 2 speaker assembly connectors.

   6. Measure the resistance between each of the front No. 1 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L68-15 (WFR+) - N1-1 Always Below 1 Ω L68-30 (WFR-) - N1-2 Always Below 1 Ω L68-8 (WFL+) - O1-1 Always Below 1 Ω L68-23 (WFL-) - O1-2 Always Below 1 Ω

   7. Measure the resistance between each of the front No. 2 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L68-9 (FR+) - I4-1 Always Below 1 Ω L68-24 (FR-) - I4-2 Always Below 1 Ω L68-14 (FL+) - I5-1 Always Below 1 Ω L68-29 (FL-) - I5-2 Always Below 1 Ω

   8. Measure the resistance between each of the rear speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L68-12 (RR+) - P3-1 Always Below 1 Ω L68-27 (RR-) - P3-2 Always Below 1 Ω L68-11 (RL+) - Q3-1 Always Below 1 Ω L68-26 (RL-) - Q3-2 Always Below 1 Ω

   9. Measure the resistance between the rear No. 2 speaker assemblies and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L68-13 (TWR+) - P6-1 Always Below 1 Ω L68-28 (TWR-) - P6-2 Always Below 1 Ω L68-10 (TWL+) - Q6-1 Always Below 1 Ω L68-25 (TWL-) - Q6-2 Always Below 1 Ω

   10. Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.

       Standard Resistance

       Tester Connection Condition Specified Condition L68-15 (WFR+) - Body ground Always 10 kΩ or higher L68-30 (WFR-) - Body ground Always 10 kΩ or higher L68-8 (WFL+) - Body ground Always 10 kΩ or higher L68-23 (WFL-) - Body ground Always 10 kΩ or higher L68-9 (FR+) - Body ground Always 10 kΩ or higher L68-24 (FR-) - Body ground Always 10 kΩ or higher L68-14 (FL+) - Body ground Always 10 kΩ or higher L68-29 (FL-) - Body ground Always 10 kΩ or higher L68-12 (RR+) - Body ground Always 10 kΩ or higher L68-27 (RR-) - Body ground Always 10 kΩ or higher L68-11 (RL+) - Body ground Always 10 kΩ or higher L68-26 (RL-) - Body ground Always 10 kΩ or higher L68-13 (TWR+) - Body ground Always 10 kΩ or higher L68-28 (TWR-) - Body ground Always 10 kΩ or higher L68-10 (TWL+) - Body ground Always 10 kΩ or higher L68-25 (TWL-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

   
   
   1. 

      Text in Illustration

      *A	for RH
      *B	for LH
      *a	Component without harness connected (Front No. 1 Speaker Assembly)

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition N1-1 - N1-2 Always 4.6 to 6.6 Ω O1-1 - O1-2 Always 4.6 to 6.6 Ω

   
   

   NG

   REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

   OK

9. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

   
   
   1. 

      Text in Illustration

      *A	for RH
      *B	for LH
      *a	Component without harness connected (Front No. 2 Speaker Assembly)

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition I4-1 - I4-2 Always 10 kΩ or higher I5-1 - I5-2 Always 10 kΩ or higher

   
   

   NG

   REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

   OK

10. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

    
    

    1. Check that the malfunction disappears when a known good speaker is installed Click here.

       OK
       Malfunction disappears.

       Tech Tips

       
       

       • Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.

       • 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 SPEAKER ASSEMBLY Click here

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

11. INSPECT REAR SPEAKER ASSEMBLY

    
    
    1. 

       Text in Illustration

       *A	for RH
       *B	for LH
       *a	Component without harness connected (Rear Speaker Assembly)

       Resistance check

       
       

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

          Standard Resistance
          Tester Connection Condition Specified Condition P3-1 - P3-2 Always 3.2 to 5.2 Ω Q3-1 - Q3-2 Always 3.2 to 5.2 Ω

    
    

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

12. INSPECT REAR NO. 2 SPEAKER ASSEMBLY

    
    
    1. 

       Text in Illustration

       *A	for RH
       *B	for LH
       *a	Component without harness connected (Rear No. 2 Speaker Assembly)

       Resistance check

       
       

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

          Standard Resistance
          Tester Connection Condition Specified Condition P6-1 - P6-2 Always 10 kΩ or higher Q6-1 - Q6-2 Always 10 kΩ or higher

    
    

    NG

    REPLACE REAR NO. 2 SPEAKER ASSEMBLY Click here

    OK

13. REPLACE REAR NO. 2 SPEAKER ASSEMBLY

    
    

    1. Check that the malfunction disappears when a known good speaker is installed Click here.

       OK
       Malfunction disappears.

       Tech Tips

       
       

       • Connect all the connectors to the rear No. 2 speaker assemblies that were disconnected.

       • 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

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    OK

    END (REAR NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)