AUDIO AND VISUAL SYSTEM (w/o Multi-display), Diagnostic DTC:74-40

DESCRIPTION

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

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK HARNESS AND CONNECTOR

   
   

   1. Disconnect the O42 stereo component amplifier assembly connector.

   2. Disconnect the J2 and I3 front No. 1 speaker assembly connectors.

   3. Disconnect the J4 and I5 front No. 2 speaker assembly connectors.

   4. Disconnect the J6 and I6 front No. 3 speaker assembly connectors.

   5. Disconnect the L4 and K4 rear No. 1 speaker assembly connectors.

   6. Disconnect the H2 front No. 4 speaker assembly connector.

   7. 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 O42-13 (FR+) - Body ground Always 10 kΩ or higher O42-28 (FR-) - Body ground Always 10 kΩ or higher O42-12 (FL+) - Body ground Always 10 kΩ or higher O42-27 (FL-) - Body ground Always 10 kΩ or higher O42-5 (WFR+) - Body ground Always 10 kΩ or higher O42-20 (WFR-) - Body ground Always 10 kΩ or higher O42-4 (WFL+) - Body ground Always 10 kΩ or higher O42-19 (WFL-) - Body ground Always 10 kΩ or higher O42-7 (CTR+) - Body ground Always 10 kΩ or higher O42-22 (CTR-) - Body ground Always 10 kΩ or higher O42-15 (RR+) - Body ground Always 10 kΩ or higher O42-30 (RR-) - Body ground Always 10 kΩ or higher O42-14 (RL+) - Body ground Always 10 kΩ or higher O42-29 (RL-) - Body ground Always 10 kΩ or higher

   8. 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 I5-3 (+) - Body ground Always 10 kΩ or higher I5-4 (-) - Body ground Always 10 kΩ or higher J4-3 (+) - Body ground Always 10 kΩ or higher J4-4 (-) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NGClick here
2. Click here

   INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

   
   
   1. 

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition I3-1 - I3-2 Always 3.2 to 4.8 Ω J2-1 - J2-2 Always 3.2 to 4.8 Ω

         Table 1. Text in Illustration

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

   
   
   • OKClick here
   • NGClick here
3. Click here

   INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

   
   
   1. 

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition I5-1 (TWR+) - I5-2 (TWR-) Always 10 kΩ or higher I5-1 (TWR+) - I5-3 (+) Always Below 1 Ω I5-2 (TWR-) - I5-4 (-) Always Below 1 Ω J4-1 (TWL+) - J4-2 (TWL-) Always 10 kΩ or higher J4-1 (TWL+) - J4-3 (+) Always Below 1 Ω J4-2 (TWL-) - J4-4 (-) Always Below 1 Ω

         Table 2. Text in Illustration

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

   
   
   • OKClick here
   • NGClick here
4. Click here

   REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

   
   

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

      OK
      Malfunction disappears.

      Tip:
      

      • 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.

   
   
   • OKClick here
   • NGClick here
5. Click here

   END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)

6. Click here

   INSPECT FRONT NO. 3 SPEAKER ASSEMBLY

   
   
   1. 

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition I6-1 - I6-2 Always 3.2 to 4.8 Ω J6-1 - J6-2 Always 3.2 to 4.8 Ω

         Table 3. Text in Illustration

         *A	for RH
         *B	for LH
         *a	Component without harness connected (Front No. 3 Speaker Assembly)

   
   
   • OKClick here
   • NGClick here
7. Click here

   INSPECT FRONT NO. 4 SPEAKER ASSEMBLY

   
   
   1. 

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition H2-1 - H2-2 Always 4.8 to 7.2 Ω

         Table 4. Text in Illustration

         *a	Component without harness connected (Front No. 4 Speaker Assembly)

   
   
   • OKClick here
   • NGClick here
8. Click here

   INSPECT REAR NO. 1 SPEAKER ASSEMBLY

   
   
   1. 

      Resistance check

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition K4-1 - K4-2 Always 3.2 to 4.8 Ω L4-1 - L4-2 Always 3.2 to 4.8 Ω

         Table 5. Text in Illustration

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

   
   
   • OKClick here
   • NGClick here
9. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

10. Click here

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLYClick here

11. Click here

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLYClick here

12. Click here

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLYClick here

13. Click here

    REPLACE FRONT NO. 4 SPEAKER ASSEMBLYClick here

14. Click here

    REPLACE REAR NO. 1 SPEAKER ASSEMBLYClick here

15. Click here

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLYClick here