AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Speaker Circuit

DESCRIPTION

The sound signals amplified by the radio and display receiver assembly are sent to the speakers from the radio and display receiver assembly via the speaker circuit.

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.

WIRING DIAGRAM

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

   
   

   • *1: for RH Side

   • *2: for LH Side

   
   

   1. Disconnect the G141 and G142 radio and display receiver assembly connectors.

   2. Disconnect the I1*1 and/or J1*2 front No. 1 speaker assembly connector.

   3. Disconnect the H1*1 and/or H3*2 front No. 2 speaker assembly connector.

   4. Disconnect the K2*1 and/or L2*2 rear speaker assembly connector.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition G141-2 (FL+) - H3-4 (TWL+) Always Below 1 Ω G141-6 (FL-) - H3-2 (TWL-) Always Below 1 Ω H3-3 (+) - J1-1 Always Below 1 Ω H3-1 (-) - J1-2 Always Below 1 Ω G142-2 (RL+) - L2-1 Always Below 1 Ω G142-6 (RL-) - L2-2 Always Below 1 Ω G141-2 (FL+) - Body ground Always 10 kΩ or higher G141-6 (FL-) - Body ground Always 10 kΩ or higher G142-2 (RL+) - Body ground Always 10 kΩ or higher G142-6 (RL-) - Body ground Always 10 kΩ or higher H1-3 (+) - Body ground Always 10 kΩ or higher H1-1 (-) - Body ground Always 10 kΩ or higher H3-3 (+) - Body ground Always 10 kΩ or higher H3-1 (-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition G141-1 (FR+) - H1-4 (TWR+) Always Below 1 Ω G141-5 (FR-) - H1-2 (TWR-) Always Below 1 Ω H1-3 (+) - I1-1 Always Below 1 Ω H1-1 (-) - I1-2 Always Below 1 Ω G142-1 (RR+) - K2-1 Always Below 1 Ω G142-3 (RR-) - K2-2 Always Below 1 Ω G141-1 (FR+) - Body ground Always 10 kΩ or higher G141-5 (FR-) - Body ground Always 10 kΩ or higher G142-1 (RR+) - Body ground Always 10 kΩ or higher G142-3 (RR-) - Body ground Always 10 kΩ or higher H1-3 (+) - Body ground Always 10 kΩ or higher H1-1 (-) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

   
   

   1. Disconnec the I1*1 and/or J1*2 front No. 1 speaker assembly connector.

      
      

      • *1: for RH Side

      • *2: for LH Side

   2. Inspect the front No. 1 speaker assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

   OK

3. CHECK FRONT NO. 2 SPEAKER ASSEMBLY

   
   

   1. Replace the front No. 2 speaker assembly.

      Click here

   2. Check the 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.

      Result
      Proceed to Malfunction disappears Malfunction appears

   
   

   Malfunction disappears

   END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

   Malfunction appears

4. INSPECT REAR SPEAKER ASSEMBLY

   
   

   1. Disconnec the K2*1 and/or L2*2 rear speaker assembly connector.

      
      

      • *1: for RH Side

      • *2: for LH Side

   2. Inspect the rear speaker assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   OK

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

   NG

   REPLACE REAR SPEAKER ASSEMBLY Click here