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

DTC Code DTC Name
B15C3 Speaker Output Short

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
B15C3 A short is detected in the speaker output circuit.

  • Speakers

  • Radio and display receiver assembly

  • Harness or connector

WIRING DIAGRAM

A01J3IDE19

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Disconnect the R25 and R26 radio and display receiver assembly connectors.

    2. Clear the DTC Click here.

    3. Check if DTC B15C3 is output.

      OK
      DTC B15C3 is not output.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  2. CHECK FOR DTC


    1. Disconnect the R25 radio and display receiver assembly connectors.

    2. Clear the DTC Click here.

    3. Check if DTC B15C3 is output.

      OK
      DTC B15C3 is not output.

    NG

    CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)


    1. Disconnect the R25 radio and display receiver assembly connector.

    2. Disconnect the T25*1 and/or T24*2 front No. 2 speaker assembly connector.


      • *1: for RH Side

      • *2: for LH Side

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

      Standard Resistance
      for RH Side
      Tester Connection Condition Specified Condition
      R25-1 (FR+) - T25-4 Always Below 1 Ω
      R25-5 (FR-) - T25-2
      R25-1 (FR+) - Body ground Always 10 kΩ or higher
      R25-5 (FR-) - Body ground
      for LH Side
      Tester Connection Condition Specified Condition
      R25-2 (FL+) - T24-4 Always Below 1 Ω
      R25-6 (FL-) - T24-2
      R25-2 (FL+) - Body ground Always 10 kΩ or higher
      R25-6 (FL-) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY)


    • *1: for RH Side

    • *2: for LH Side


    1. Disconnect the T25*1 and/or T24*2 front No. 2 speaker assembly connector.

    2. Disconnect the S16*1 and/or S15*2 front No. 1 speaker assembly connector.

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

      Standard Resistance
      for RH Side
      Tester Connection Condition Specified Condition
      T25-3 - S16-1 Always Below 1 Ω
      T25-1 - S16-2
      T25-3 - Body ground Always 10 kΩ or higher
      T25-1 - Body ground
      for LH Side
      Tester Connection Condition Specified Condition
      T24-3 - S15-1 Always Below 1 Ω
      T24-1 - S15-2
      T24-3 - Body ground Always 10 kΩ or higher
      T24-1 - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Disconnect the S16*1 and/or S15*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.


    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  6. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Replace the front No. 2 speaker assembly with a known good one Click here.

    2. Check that the malfunction disappears.

      OK
      Malfunction disappears.

      Tech Tips


      • Connect all the speaker connectors to the speakers.

      • When there is a possibility that either the right or left front No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both LH and RH sides.


    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

  7. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY)


    1. Disconnect the R26 radio and display receiver assembly connector.

    2. Disconnect the S18*1 and/or S17*2 rear speaker assembly connector.


      • *1: for RH Side

      • *2: for LH Side

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

      Standard Resistance
      for RH Side
      Tester Connection Condition Specified Condition
      R26-1 (RR+) - S18-1 Always Below 1 Ω
      R26-3 (RR-) - S18-2
      R26-1 (RR+) - Body ground Always 10 kΩ or higher
      R26-3 (RR-) - Body ground
      for LH Side
      Tester Connection Condition Specified Condition
      R26-2 (RL+) - S17-1 Always Below 1 Ω
      R26-6 (RL-) - S17-2
      R26-2 (RL+) - Body ground Always 10 kΩ or higher
      R26-6 (RL-) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT REAR SPEAKER ASSEMBLY


    1. Disconnect the S18*1 and/or S17*2 rear speaker assembly connector.


      • *1: for RH Side

      • *2: for LH Side

    2. Inspect the rear speaker assembly Click here.


    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here