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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio / Video System - Diagnostic Codes (1 Of 2) >> Audio And Visual System >> DTC B15C3-71: Speaker Output Short Actuator Stuck [11/2023 - ] >> Procedure

DTC B15C3-71: Speaker Output Short Actuator Stuck [11/2023 - ]: Procedure

  1. CHECK MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/o "JBL" Sound System with DCM (Telematics Transceiver) A
      w/o "JBL" Sound System without DCM (Telematics Transceiver) B
      w/ "JBL" Sound System with DCM (Telematics Transceiver) C
      w/ "JBL" Sound System without DCM (Telematics Transceiver) D

    Result: 

    B 

    See step  10

    Result: 

    C 

    See step  16

    Result: 

    D 

    See step  27

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EACH SPEAKER OR DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the H9 radio and display receiver assembly connector.
    2. Disconnect the H12 DCM (telematics transceiver) connector.
    3. Disconnect the H73 front No. 2 speaker assembly LH connector.
    4. Disconnect the K6 and K1 rear speaker assembly connectors.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H9-1 (FR+) or H12-1 (SPI+) - Body ground Always 10 kΩ or higher
      H9-6 (FR-) or H12-2 (SPI-) - Body ground Always 10 kΩ or higher
      H9-2 (FL+) or H73-4 (TWL+) - Body ground Always 10 kΩ or higher
      H9-7 (FL-) or H73-2 (TWL-) - Body ground Always 10 kΩ or higher
      H9-4 (RR+) or K1-2 - Body ground Always 10 kΩ or higher
      H9-9 (RR-) or K1-1 - Body ground Always 10 kΩ or higher
      H9-3 (RL+) or K6-2 - Body ground Always 10 kΩ or higher
      H9-8 (RL-) or K6-1 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 2 SPEAKER ASSEMBLY RH) 
    1. Disconnect the H12 DCM (telematics transceiver) connector.
    2. Disconnect the H117 front No. 2 speaker assembly RH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H12-3 (SPO+) or H117-4 (+TW) - Body ground Always 10 kΩ or higher
      H12-4 (SPO-) or H117-2 (-TW) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY) 
    1. Disconnect the J1 and J17 front No. 1 speaker assembly connectors.
    2. Disconnect the H117 and H73 front No. 2 speaker assembly connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J17-2 or H73-3 (+) - Body ground Always 10 kΩ or higher
      J17-1 or H73-1 (-) - Body ground Always 10 kΩ or higher
      J1-2 or H117-3 (+) - Body ground Always 10 kΩ or higher
      J1-1 or H117-1 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Result: 

    OK 

    See step  5

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  6

  6. INSPECT REAR SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  7

  7. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Disconnect the telematics DCM (transceiver connector).
      GTY1027860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DCM (Telematics Transceiver))
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (SPI+) - 3 (SPO+) Always Below 1 Ω
      2 (SPI-) - 4 (SPO-) Always Below 1 Ω
      1 (SPI+) - 2 (SPI-) Always 10 kΩ or higher
      3 (SPO+) - 4 (SPO-) Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [11/2023 - ] 

    Result: 

    OK 

    See step  8

  8. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY 
    1. Replace the speaker assembly with a new or known good one.

      Refer to REMOVAL [12/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  9

  9. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. Turn the ignition switch off.
    3. Check for DTCs and proceed to the following step.

      Body Electrical > Navigation System > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTC B15C3-71 is output B

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

  10. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EACH SPEAKER) 
    1. Disconnect the H9 radio and display receiver assembly connector.
    2. Disconnect the H117 and H73 front No. 2 speaker assembly connectors.
    3. Disconnect the K6 and K1 rear speaker assembly connectors.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H9-1 (FR+) or H117-4 (+TW) - Body ground Always 10 kΩ or higher
      H9-6 (FR-) or H117-2 (-TW) - Body ground Always 10 kΩ or higher
      H9-2 (FL+) or H73-4 (TWL+) - Body ground Always 10 kΩ or higher
      H9-7 (FL-) or H73-2 (TWL-) - Body ground Always 10 kΩ or higher
      H9-4 (RR+) or K1-2 - Body ground Always 10 kΩ or higher
      H9-9 (RR-) or K1-1 - Body ground Always 10 kΩ or higher
      H9-3 (RL+) or K6-2 - Body ground Always 10 kΩ or higher
      H9-8 (RL-) or K6-1 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY) 
    1. Disconnect the J1 and J17 front No. 1 speaker assembly connectors.
    2. Disconnect the H117 and H73 front No. 2 speaker assembly connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J1-2 or H117-3 (+) - Body ground Always 10 kΩ or higher
      J1-1 or H117-1 (-) - Body ground Always 10 kΩ or higher
      J17-2 or H73-3 (+) - Body ground Always 10 kΩ or higher
      J17-1 or H73-1 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  12

  12. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  13

  13. INSPECT REAR SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  14

  14. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY 
    1. Replace the speaker assembly with a new or known good one.

      Refer to REMOVAL [12/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  15

  15. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. Turn the ignition switch off.
    3. Check for DTCs and proceed to the following step.

      Body Electrical > Navigation System > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTC B15C3-71 is output B

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

  16. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - EACH SPEAKER, DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the M37 stereo component amplifier assembly connector.
    2. Disconnect the H12 DCM (telematics transceiver) connector.
    3. Disconnect the H74 and H72 front No. 2 speaker assembly connector.
    4. Disconnect the H13 and H14 front No. 3 speaker assembly connectors.
    5. Disconnect the K1 and K6 rear speaker assembly connectors.
    6. Disconnect the M36 rear No. 2 speaker assembly connector.
    7. Disconnect the W22 and W23 rear No. 3 speaker assembly connectors.
    8. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M37-13 (FR+) or H72-2 (TWR+) - Body ground Always 10 kΩ or higher
      M37-28 (FR-) or H72-1 (TWR-) - Body ground Always 10 kΩ or higher
      M37-12 (FL+) or H74-2 (TWL+) - Body ground Always 10 kΩ or higher
      M37-27 (FL-) or H74-1 (TWL-) - Body ground Always 10 kΩ or higher
      M37-9 (TWR+) or H12-1 (SPI+) - Body ground Always 10 kΩ or higher
      M37-24 (TWR-) or H12-2 (SPI-) - Body ground Always 10 kΩ or higher
      M37-8 (TWL+) or H14-3 (+) - Body ground Always 10 kΩ or higher
      M37-23 (TWL-) or H14-2 (-) - Body ground Always 10 kΩ or higher
      M37-15 (RR+) or K1-2 - Body ground Always 10 kΩ or higher
      M37-30 (RR-) or K1-1 - Body ground Always 10 kΩ or higher
      M37-14 (RL+) or K6-2 - Body ground Always 10 kΩ or higher
      M37-29 (RL-) or K6-1 - Body ground Always 10 kΩ or higher
      M37-6 (WF1+) or M36-4 (WF1+) - Body ground Always 10 kΩ or higher
      M37-21 (WF1-) or M36-3 (WF1-) - Body ground Always 10 kΩ or higher
      M37-5 (WF2+) or M36-2 (WF2+) - Body ground Always 10 kΩ or higher
      M37-20 (WF2-) or M36-1 (WF2-) - Body ground Always 10 kΩ or higher
      M37-11 (SR+) or W22-2 - Body ground Always 10 kΩ or higher
      M37-26 (SR-) or W22-1 - Body ground Always 10 kΩ or higher
      M37-10 (SL+) or W23-2 - Body ground Always 10 kΩ or higher
      M37-25 (SL-) or W23-1 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

  17. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 3 SPEAKER ASSEMBLY) 
    1. Disconnect the H12 DCM (telematics transceiver) connector.
    2. Disconnect the H13 front No. 3 speaker assembly RH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H12-3 (SPO+) or H13-3 (+) - Body ground Always 10 kΩ or higher
      H12-4 (SPO-) or H13-2 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  18

  18. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY) 
    1. Disconnect the J1 and J17 front No. 1 speaker assembly connectors.
    2. Disconnect the H13 and H14 front No. 3 speaker assembly connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J17-2 or H14-4 (+) - Body ground Always 10 kΩ or higher
      J17-1 or H14-1 (-) - Body ground Always 10 kΩ or higher
      J1-2 or H13-4 (+) - Body ground Always 10 kΩ or higher
      J1-1 or H13-1 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  19

  19. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  20

  20. INSPECT REAR SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  21

  21. INSPECT REAR NO. 2 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR NO. 2 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  22

  22. INSPECT REAR NO. 3 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR NO. 3 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  23

  23. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Remove the DCM (telematics transceiver).

      Refer to REMOVAL [11/2023 - ]

    2. Measure the resistance according to the value(s) in the table below.
      GTY843489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DCM (Telematics Transceiver))

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (SPI+) - 3 (SPO+) Always Below 1 Ω
      2 (SPI-) - 4 (SPO-) Always Below 1 Ω
      1 (SPI+) - 2 (SPI-) Always 10 kΩ or higher
      3 (SPO+) - 4 (SPO-) Always 10 kΩ or higher
      1 (SPI+) or 3 (SPO+) - Body ground Always 10 kΩ or higher
      2 (SPI-) or 4 (SPO-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [11/2023 - ] 

    Result: 

    OK 

    See step  24

  24. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  25

  25. REPLACE FRONT NO. 3 SPEAKER ASSEMBLY 
    1. Replace the speaker assembly with a new or known good one.

      Refer to REMOVAL [12/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  26

  26. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. Turn the ignition switch off.
    3. Check for DTCs and proceed to the following step.

      Body Electrical > Navigation System > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTC B15C3-71 is output B

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

  27. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - EACH SPEAKER, DCM (TELEMATICS TRANSCEIVER)) 
    1. Disconnect the M37 stereo component amplifier assembly connector.
    2. Disconnect the H74 front No. 2 speaker assembly LH connector.
    3. Disconnect the H13 and H14 front No. 3 speaker assembly connectors.
    4. Disconnect the K1 and K6 rear speaker assembly connectors.
    5. Disconnect the M36 rear No. 2 speaker assembly connector.
    6. Disconnect the W22 and W23 rear No. 3 speaker assembly connectors.
    7. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M37-13 (FR+) or H72-2 (TWR+) - Body ground Always 10 kΩ or higher
      M37-28 (FR-) or H72-1 (TWR-) - Body ground Always 10 kΩ or higher
      M37-12 (FL+) or H74-2 (TWL+) - Body ground Always 10 kΩ or higher
      M37-27 (FL-) or H74-1 (TWL-) - Body ground Always 10 kΩ or higher
      M37-9 (TWR+) or H13-3 (+) - Body ground Always 10 kΩ or higher
      M37-24 (TWR-) or H13-2 (-) - Body ground Always 10 kΩ or higher
      M37-8 (TWL+) or H14-3 (+) - Body ground Always 10 kΩ or higher
      M37-23 (TWL-) or H14-2 (-) - Body ground Always 10 kΩ or higher
      M37-15 (RR+) or K1-2 - Body ground Always 10 kΩ or higher
      M37-30 (RR-) or K1-1 - Body ground Always 10 kΩ or higher
      M37-14 (RL+) or K6-2 - Body ground Always 10 kΩ or higher
      M37-29 (RL-) or K6-1 - Body ground Always 10 kΩ or higher
      M37-6 (WF1+) or M36-4 (WF1+) - Body ground Always 10 kΩ or higher
      M37-21 (WF1-) or M36-3 (WF1-) - Body ground Always 10 kΩ or higher
      M37-5 (WF2+) or M36-2 (WF2+) - Body ground Always 10 kΩ or higher
      M37-20 (WF2-) or M36-1 (WF2-) - Body ground Always 10 kΩ or higher
      M37-11 (SR+) or W22-2 - Body ground Always 10 kΩ or higher
      M37-26 (SR-) or W22-1 - Body ground Always 10 kΩ or higher
      M37-10 (SL+) or W23-2 - Body ground Always 10 kΩ or higher
      M37-25 (SL-) or W23-1 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  28

  28. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY) 
    1. Disconnect the J1 and J17 front No. 1 speaker assembly connectors.
    2. Disconnect the H13 and H14 front No. 3 speaker assembly connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J17-2 or H14-4 (+) - Body ground Always 10 kΩ or higher
      J17-1 or H14-1 (-) - Body ground Always 10 kΩ or higher
      J1-2 or H13-4 (+) - Body ground Always 10 kΩ or higher
      J1-1 or H13-1 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  29

  29. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  30

  30. INSPECT REAR SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  31

  31. INSPECT REAR NO. 2 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR NO. 2 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  32

  32. INSPECT REAR NO. 3 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR NO. 3 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  33

  33. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

    Result: 

    OK 

    See step  34

  34. REPLACE FRONT NO. 3 SPEAKER ASSEMBLY 
    1. Replace the speaker assembly with a new or known good one.

      Refer to REMOVAL [12/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  35

  35. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. Turn the ignition switch off.
    3. Check for DTCs and proceed to the following step.

      Body Electrical > Navigation System > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTC B15C3-71 is output B

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY. Refer to  REMOVAL [12/2019 - ] 

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