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. Detection Item DTC Detection Condition Trouble Area
B15C3 Speaker Output Short A short is detected in the speaker output circuit

  • Harness or connector

  • Speakers

  • Radio and display receiver assembly

WIRING DIAGRAM

B0028CAE01
for 2 Speakers
*a Front No. 1 Speaker Assembly LH
*b Front No. 1 Speaker Assembly RH
*c Radio and Display Receiver Assembly
B00292TE01
B0024LPE09

CAUTION / NOTICE / HINT

Tech Tips

When replacing the radio and display receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Navigation System > Clear DTCs

    2. Recheck for DTCs and check that no DTCs are output.

      Click here


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Result Proceed to
      OK A
      NG (for 2 Speakers) B
      NG (for 4 Speakers) C
      NG (for 6 Speakers) D

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) Click here

    D

    CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) Click here

    B

  2. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side


    1. Disconnect the G40 radio and display receiver assembly connector.

    2. Disconnect the K4*1 and/or J4*2 front No. 1 speaker assembly connector.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      G40-2 (FL+) - K4-1 Always Below 1 Ω
      G40-6 (FL-) - K4-2 Always Below 1 Ω
      G40-2 (FL+) or K4-1 - Body ground Always 10 kΩ or higher
      G40-6 (FL-) or K4-2 - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      G40-1 (FR+) - J4-1 Always Below 1 Ω
      G40-5 (FR-) - J4-2 Always Below 1 Ω
      G40-1 (FR+) or J4-1 - Body ground Always 10 kΩ or higher
      G40-5 (FR-) or J4-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly.

      Click here

    2. Inspect the front No. 1 speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side


    1. Disconnect the G40 and G41 radio and display receiver assembly connectors.

    2. Disconnect the K4*1 and/or J4*2 front No. 1 speaker assembly connector.

    3. Disconnect the M2*1 and/or L2*2 rear speaker assembly connector.

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

      Standard Resistance
      for LH Side
      Tester Connection Condition Specified Condition
      G40-2 (FL+) - K4-1 Always Below 1 Ω
      G40-6 (FL-) - K4-2 Always Below 1 Ω
      G41-2 (RL+) - M2-1 Always Below 1 Ω
      G41-6 (RL-) - M2-2 Always Below 1 Ω
      G40-2 (FL+) or K4-1 - Body ground Always 10 kΩ or higher
      G40-6 (FL-) or K4-2 - Body ground Always 10 kΩ or higher
      G41-2 (RL+) or M2-1 - Body ground Always 10 kΩ or higher
      G41-6 (RL-) or M2-2 - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      G40-1 (FR+) - J4-1 Always Below 1 Ω
      G40-5 (FR-) - J4-2 Always Below 1 Ω
      G41-1 (RR+) - L2-1 Always Below 1 Ω
      G41-3 (RR-) - L2-2 Always Below 1 Ω
      G40-1 (FR+) or J4-1 - Body ground Always 10 kΩ or higher
      G40-5 (FR-) or J4-2 - Body ground Always 10 kΩ or higher
      G41-1 (RR+) or L2-1 - Body ground Always 10 kΩ or higher
      G41-3 (RR-) or L2-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly.

      Click here

    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

  6. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

      for Smart Cab: Click here

      for Double Cab: Click here

    2. Inspect the rear speaker assembly.

      for Smart Cab: Click here

      for Double Cab: Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPLACE REAR SPEAKER ASSEMBLY for Smart Cab: Click here
    REPLACE REAR SPEAKER ASSEMBLY for Double Cab: Click here

  7. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)


    • *1: for LH Side

    • *2: for RH Side


    1. Disconnect the G40 and G41 radio and display receiver assembly connectors.

    2. Disconnect the K4*1 and/or J4*2 front No. 1 speaker assembly connector.

    3. Disconnect the K7*1 and/or J7*2 front No. 2 speaker assembly connector.

    4. Disconnect the M2*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
      G40-2 (FL+) - K7-4 (TWL+) Always Below 1 Ω
      G40-6 (FL-) - K7-2 (TWL-) Always Below 1 Ω
      K7-3 (+) - K4-1 Always Below 1 Ω
      K7-1 (-) - K4-2 Always Below 1 Ω
      G41-2 (RL+) - M2-1 Always Below 1 Ω
      G41-6 (RL-) - M2-2 Always Below 1 Ω
      G40-2 (FL+) or K7-4 (TWL+) - Body ground Always 10 kΩ or higher
      G40-6 (FL-) or K7-2 (TWL-) - Body ground Always 10 kΩ or higher
      K7-3 (+) or K4-1 - Body ground Always 10 kΩ or higher
      K7-1 (-) or K4-2 - Body ground Always 10 kΩ or higher
      G41-2 (RL+) or M2-1 - Body ground Always 10 kΩ or higher
      G41-6 (RL-) or M2-2 - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      G40-1 (FR+) - J7-4 (TWR+) Always Below 1 Ω
      G40-5 (FR-) - J7-2 (TWR-) Always Below 1 Ω
      J7-3 (+) - J4-1 Always Below 1 Ω
      J7-1 (-) - J4-2 Always Below 1 Ω
      G41-1 (RR+) - L2-1 Always Below 1 Ω
      G41-3 (RR-) - L2-2 Always Below 1 Ω
      G40-1 (FR+) or J7-4 (TWR+) - Body ground Always 10 kΩ or higher
      G40-5 (FR-) or J7-2 (TWR-) - Body ground Always 10 kΩ or higher
      J7-3 (+) or J4-1 - Body ground Always 10 kΩ or higher
      J7-1 (-) or J4-2 - Body ground Always 10 kΩ or higher
      G41-1 (RR+) or L2-1 - Body ground Always 10 kΩ or higher
      G41-3 (RR-) or L2-2 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. Remove the front No. 1 speaker assembly.

      Click here

    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

  9. INSPECT REAR SPEAKER ASSEMBLY


    1. Remove the rear speaker assembly.

      Click here

    2. Inspect the rear speaker assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

  10. CHECK FRONT NO. 2 SPEAKER ASSEMBLY


    1. Replace the front No. 2 speaker assembly.

      Click here

    2. Clear the DTCs.

      Click here


      Body Electrical > Navigation System > Clear DTCs

    3. Recheck for DTCs and check that no DTCs are output.

      Click here


      Body Electrical > Navigation System > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here