AUDIO AND VISUAL SYSTEM (for Radio and Display Type), Diagnostic DTC:B15C3

DESCRIPTION

This DTC is stored when a malfunction occurs in the speakers.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR

   
   

   1. Disconnect the connectors from the radio and display receiver assembly and speakers.

   2. 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 I152-1 (FR+) - Body ground Always 10 kΩ or higher I152-5 (FR-) - Body ground Always 10 kΩ or higher I152-2 (FL+) - Body ground Always 10 kΩ or higher I152-6 (FL-) - Body ground Always 10 kΩ or higher I153-1 (RR+) - Body ground Always 10 kΩ or higher I153-3 (RR-) - Body ground Always 10 kΩ or higher I153-2 (RL+) - Body ground Always 10 kΩ or higher I153-6 (RL-) - Body ground Always 10 kΩ or higher

   3. 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 I83-3 (+) - Body ground Always 10 kΩ or higher I83-1 (-) - Body ground Always 10 kΩ or higher I1-3 (+) - Body ground Always 10 kΩ or higher I1-1 (-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. 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 J5-1 - J5-2 Always 3.2 to 4.8 Ω K5-1 - K5-2 Always 3.2 to 4.8 Ω

   
   

   NG

   REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

   OK

3. 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 I83-2 (TWR-) - I83-4 (TWR+) Always 10 kΩ or higher I83-1 (-) - I83-2 (TWR-) Always Below 1 Ω I83-3 (+) - I83-4 (TWR+) Always Below 1 Ω I1-2 (TWL-) - I1-4 (TWL+) Always 10 kΩ or higher I1-1 (-) - I1-2 (TWL-) Always Below 1 Ω I1-3 (+) - I1-4 (TWL+) Always Below 1 Ω

   
   

   NG

   REPLACE FRONT NO. 2 SPEAKER ASSEMBLY Click here

   OK

4. 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)

5. 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 O18-1 - O18-2 Always 3.2 to 4.8 Ω O21-1 - O21-2 Always 3.2 to 4.8 Ω

   
   

   NG

   REPLACE REAR SPEAKER ASSEMBLY Click here

   OK

   REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here