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 No. 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

A01DXCAE01

INSPECTION PROCEDURE

Tech Tips

When replacing the radio and display receiver assembly, it is necessary to perform the vehicle contract setting for T-connect.

PROCEDURE


  1. CHECK FOR DTC


    1. Disconnect the R22 (for 6 Speakers) and R23 radio and display receiver assembly connectors.

    2. Clear the DTCs Click here.

    3. Check if DTC B15C3 is output Click here.

      OK
      DTC B15C3 is not output.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

  2. CHECK FOR DTC


    1. Reconnect the R23 radio and display receiver assembly connector.

    2. Clear the DTC Click here.

    3. Check if DTC B15C3 is output Click here.

      OK
      DTC B15C3 is not output.
      Result
      Result Proceed to
      Malfunction in front speaker area A
      Malfunction in rear speaker area (for 6 Speakers) B

    B

    CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) Click here

    A

  3. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for RH Side

    • *2: for LH Side


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

    2. for 6 Speakers:

      Disconnect the T24*1 and/or T23*2 front No. 2 speaker assembly connector.

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

      Standard Resistance
      for RH Side (for 6 Speakers)
      Tester Connection Condition Specified Condition
      R23-1 (FR+) - T24-4 Always Below 1 Ω
      R23-5 (FR-) - T24-2 Always Below 1 Ω
      T24-3 - S16-1 Always Below 1 Ω
      T24-1 - S16-2 Always Below 1 Ω
      R23-1 (FR+) - Body ground Always 10 kΩ or higher
      R23-5 (FR-) - Body ground Always 10 kΩ or higher
      T24-3 - Body ground Always 10 kΩ or higher
      T24-1) - Body ground Always 10 kΩ or higher
      for LH Side (for 6 Speakers)
      Tester Connection Condition Specified Condition
      R23-2 (FL+) - T23-4 Always Below 1 Ω
      R23-6 (FL-) - T23-2 Always Below 1 Ω
      T23-3 - S15-1 Always Below 1 Ω
      T23-1 - S15-2 Always Below 1 Ω
      R23-2 (FL+) - Body ground Always 10 kΩ or higher
      R23-6 (FL-) - Body ground Always 10 kΩ or higher
      T23-3 - Body ground Always 10 kΩ or higher
      T23-1 - Body ground Always 10 kΩ or higher
      for RH Side (except 6 Speakers)
      Tester Connection Condition Specified Condition
      R23-1 (FR+) - S16-1 Always Below 1 Ω
      R23-5 (FR-) - S16-2 Always Below 1 Ω
      R23-1 (FR+) - Body ground Always 10 kΩ or higher
      R23-5 (FR-) - Body ground Always 10 kΩ or higher
      for LH Side (except 6 Speakers)
      Tester Connection Condition Specified Condition
      R23-2 (FL+) - S15-1 Always Below 1 Ω
      R23-6 (FL-) - S15-2 Always Below 1 Ω
      R23-2 (FL+) - Body ground Always 10 kΩ or higher
      R23-6 (FL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. 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.

      Result
      Result Proceed to
      OK (for 6 Speakers) A
      OK (except 6 Speakers) B
      NG C

    B

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    C

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    A

  5. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


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

    2. Check that the malfunction disappears.

      Tech Tips


      • Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.

      • Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.

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

      OK
      Malfunction disappears.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

  6. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for RH Side

    • *2: for LH Side


    1. Disconnect the R22 radio and display receiver assembly connector.

    2. for Double Cab:


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

    3. for Extra Cab:


      1. Disconnect the S20*1 and/or S19*2 rear speaker assembly connector.

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

      Standard Resistance
      for Double Cab RH Side
      Tester Connection Condition Specified Condition
      R22-1 (RR+) - S18-1 Always Below 1 Ω
      R22-3 (RR-) - S18-2 Always Below 1 Ω
      R22-1 (RR+) - Body ground Always 10 kΩ or higher
      R22-3 (RR-) - Body ground Always 10 kΩ or higher
      for Double Cab LH Side
      Tester Connection Condition Specified Condition
      R22-2 (RL+) - S17-1 Always Below 1 Ω
      R22-6 (RL-) - S17-2 Always Below 1 Ω
      R22-2 (RL+) - Body ground Always 10 kΩ or higher
      R22-6 (RL-) - Body ground Always 10 kΩ or higher
      for Extra Cab RH Side
      Tester Connection Condition Specified Condition
      R22-1 (RR+) - S20-1 Always Below 1 Ω
      R22-3 (RR-) - S20-2 Always Below 1 Ω
      R22-1 (RR+) - Body ground Always 10 kΩ or higher
      R22-3 (RR-) - Body ground Always 10 kΩ or higher
      except Extra Cab LH Side
      Tester Connection Condition Specified Condition
      R22-2 (RL+) - S19-1 Always Below 1 Ω
      R22-6 (RL-) - S19-2 Always Below 1 Ω
      R22-2 (RL+) - Body ground Always 10 kΩ or higher
      R22-6 (RL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT REAR SPEAKER ASSEMBLY


    • *1: for RH Side

    • *2: for LH Side


    1. for Double Cab:


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

    2. for Extra Cab:


      1. Disconnect the S20*1 and/or S19*2 rear speaker assembly connector.

    3. Inspect the rear speaker assembly Click here.


    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here