AUDIO AND VISUAL SYSTEM Speaker Circuit

DESCRIPTION

for 6 Speakers:

• If there is a short in this circuit, the radio 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 receiver assembly or speakers.

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

for 8 Speakers:

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

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

WIRING DIAGRAM

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. 

      Text in Illustration

      *1	Front view of wire harness connector (to Radio Receiver Assembly)
      *2	Front view of wire harness connector (to Radio Receiver Assembly)
      *3	Front view of wire harness connector (to Front No. 1 Speaker, Rear Speaker)
      *4	Front view of wire harness connector (to Front No. 2 Speaker)

      Disconnect the connectors shown in the illustration from the radio receiver assembly and speakers.

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

      Standard Resistance
      Tester Connection Condition Specified Condition L34-2 (FL+) - I3-2 (TWL+) Always Below 1 Ω L34-6 (FL-) - I3-4 (TWL-) Always Below 1 Ω L34-1 (FR+) - I2-2 (TWR+) Always Below 1 Ω L34-5 (FR-) - I2-4 (TWR-) Always Below 1 Ω

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

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

   4. Measure the resistance between each of the rear speakers and the radio receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L35-2 (RL+) - Q3-1 Always Below 1 Ω L35-6 (RL-) - Q3-2 Always Below 1 Ω L35-1 (RR+) - P3-1 Always Below 1 Ω L35-3 (RR-) - P3-2 Always Below 1 Ω

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

      Standard Resistance

      Tester Connection Condition Specified Condition L34-2 (FL+) - Body ground Always 10 kΩ or higher L34-6 (FL-) - Body ground Always 10 kΩ or higher L34-1 (FR+) - Body ground Always 10 kΩ or higher L34-5 (FR-) - Body ground Always 10 kΩ or higher L35-2 (RL+) - Body ground Always 10 kΩ or higher L35-6 (RL-) - Body ground Always 10 kΩ or higher L35-1 (RR+) - Body ground Always 10 kΩ or higher L35-3 (RR-) - Body ground Always 10 kΩ or higher

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

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

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT FRONT NO. 1 SPEAKER

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Front No. 1 Speaker)

      Resistance check

      
      

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

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

   
   

   NG

   REPLACE FRONT NO. 1 SPEAKER Click here

   OK

4. INSPECT FRONT NO. 2 SPEAKER

   
   

   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 speakers 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 Click here

   OK

   END (FRONT NO. 2 SPEAKER WAS DEFECTIVE)

5. INSPECT REAR SPEAKER

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Rear Speaker)

      Resistance check

      
      

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

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

   
   

   NG

   REPLACE REAR SPEAKER Click here

   OK

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

6. CHECK HARNESS AND CONNECTOR

   
   

   1. 

      

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

      Text in Illustration

      *1	Front view of wire harness connector (to Radio Receiver Assembly)
      *2	Front view of wire harness connector (to Radio Receiver Assembly)
      *3	Front view of wire harness connector (to Front No. 1 Speaker, Rear Speaker)
      *4	Front view of wire harness connector (to Front No. 2 Speaker)
      *5	Front view of wire harness connector (to Rear No. 2 Speaker)
      *6	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

   2. Measure the resistance between the radio receiver assembly and the stereo component amplifier assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L108-2 (RR+) - L34-1 (FR+) Always Below 1 Ω L108-7 (RR-) - L34-5 (FR-) Always Below 1 Ω L108-1 (RL+) - L34-2 (FL+) Always Below 1 Ω L108-6 (RL-) - L34-6 (FL-) Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition L108-4 (WFL+) - O1-1 Always Below 1 Ω L108-11 (WFL-) - O1-2 Always Below 1 Ω L108-3 (WFR+) - N1-1 Always Below 1 Ω L108-8 (WFR-) - N1-2 Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition L34-2 (FL+) - I5-1 Always Below 1 Ω L34-6 (FL-) - I5-2 Always Below 1 Ω L34-1 (FR+) - I4-1 Always Below 1 Ω L34-5 (FR-) - I4-2 Always Below 1 Ω

   5. Measure the resistance between each of the rear speakers and the radio receiver assembly to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition L35-2 (RL+) - Q5-1 (+) Always Below 1 Ω L35-6 (RL-) - Q5-2 (-) Always Below 1 Ω L35-1 (RR+) - P5-1 (+) Always Below 1 Ω L35-3 (RR-) - P5-2 (-) Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition Q3-1 - Q5-3 (+) Always Below 1 Ω Q3-2 - Q5-4 (-) Always Below 1 Ω P3-1 - P5-3 (+) Always Below 1 Ω P3-2 - P5-4 (-) Always Below 1 Ω

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

      Standard Resistance

      Tester Connection Condition Specified Condition L34-2 (FL+) - Body ground Always 10 kΩ or higher L34-6 (FL-) - Body ground Always 10 kΩ or higher L34-1 (FR+) - Body ground Always 10 kΩ or higher L34-5 (FR-) - Body ground Always 10 kΩ or higher L35-2 (RL+) - Body ground Always 10 kΩ or higher L35-6 (RL-) - Body ground Always 10 kΩ or higher L35-1 (RR+) - Body ground Always 10 kΩ or higher L35-3 (RR-) - Body ground Always 10 kΩ or higher

   8. 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 L108-4 (WFL+) - Body ground Always 10 kΩ or higher L108-11 (WFL-) - Body ground Always 10 kΩ or higher L108-3 (WFR+) - Body ground Always 10 kΩ or higher L108-8 (WFR-) - Body ground Always 10 kΩ or higher L108-2 (RR+) - Body ground Always 10 kΩ or higher L108-7 (RR-) - Body ground Always 10 kΩ or higher L108-1 (RL+) - Body ground Always 10 kΩ or higher L108-6 (RL-) - Body ground Always 10 kΩ or higher

   9. Measure the resistance between each of the rear speakers and body ground to check for an open circuit in the wire harness.

      Standard Resistance
      Tester Connection Condition Specified Condition Q3-1 - Body ground Always 10 kΩ or higher Q3-2 - Body ground Always 10 kΩ or higher P3-1 - Body ground Always 10 kΩ or higher P3-2 - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. INSPECT FRONT NO. 1 SPEAKER

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Front No. 1 Speaker)

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition O1-1 - O1-2 Always 1.6 to 2.4 Ω N1-1 - N1-2 Always 1.6 to 2.4 Ω

   
   

   NG

   REPLACE FRONT NO. 1 SPEAKER Click here

   OK

8. INSPECT FRONT NO. 2 SPEAKER

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Front No. 2 Speaker)

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition I5-1 - I5-2 Always 6.4 to 9.6 Ω I4-1 - I4-2 Always 6.4 to 9.6 Ω

   
   

   NG

   REPLACE FRONT NO. 2 SPEAKER Click here

   OK

9. INSPECT REAR SPEAKER

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Rear Speaker)

      Resistance check

      
      

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

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

   
   

   NG

   REPLACE REAR SPEAKER Click here

   OK

10. INSPECT REAR NO. 2 SPEAKER

    
    

    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 speakers 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 WAS DEFECTIVE)