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DTC B1ACA-71: Front Right Speaker Cable Actuator Stuck [11/2023 - ]: Procedure

  1. CHECK PROBLEM SYMPTOM 
    1. Confirm the problem symptoms and proceed to the respective link.

      Result

      Result Proceed to
      No sound is output from the front No. 1 speaker assembly RH or front No. 3 speaker assembly RH (w/ DCM (Telematics Transceiver)) A
      No sound is output from the front No. 1 speaker assembly RH or front No. 3 speaker assembly RH (w/o DCM (Telematics Transceiver)) B
      No sound is output from the front No. 2 speaker assembly RH C

    Result: 

    B 

    See step  9

    Result: 

    C 

    See step  15

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY RH) 
    1. Disconnect the M37 stereo component amplifier assembly connector.
    2. Disconnect the H12 DCM (Telematics Transceiver) connector.
    3. Disconnect the H13 front No. 3 speaker assembly RH connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M37-9 (TWR+) - H12-1 (SPI+) Always Below 1 Ω
      M37-24 (TWR-) - H12-2 (SPI-) Always Below 1 Ω
      H13-3 (+) - H12-3 (SPO+) Always Below 1 Ω
      H13-2 (-) - H12-4 (SPO-) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H13-4 (+) - J1-2 Always Below 1 Ω
      H13-1 (-) - J1-1 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Disconnect the DCM (telematics 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  5

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY RH 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

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

    Result: 

    OK 

    See step  6

  6. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. In accordance with the display of the GTS, perform a speaker circuit energization inspection.

      Refer to UTILITY [10/2022 - ]

      Body Electrical > Navigation System > Utility 

      Tester Display
      Speaker Line Electricity Check
    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 B1ACA-71 is output B

    Result: 

    A 

    END (FRONT NO. 1 SPEAKER ASSEMBLY RH IS DEFECTIVE) 

    Result: 

    B 

    See step  7

  7. REPLACE FRONT NO. 3 SPEAKER ASSEMBLY RH 
    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  8

  8. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. In accordance with the display of the GTS, perform a speaker circuit energization inspection.

      Refer to UTILITY [10/2022 - ]

      Body Electrical > Navigation System > Utility 

      Tester Display
      Speaker Line Electricity Check
    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 B1ACA-71 is output B

    Result: 

    A 

    END (FRONT NO. 3 SPEAKER ASSEMBLY RH IS DEFECTIVE) 

    Result: 

    B 

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

  9. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY RH) 
    1. Disconnect the M37 stereo component amplifier assembly 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
      M37-9 (TWR+) - H13-3 (+) Always Below 1 Ω
      M37-24 (TWR-) - H13-2 (-) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  10

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H13-4 (+) - J1-2 Always Below 1 Ω
      H13-1 (-) - J1-1 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  11

  11. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY RH 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

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

    Result: 

    OK 

    See step  12

  12. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. In accordance with the display of the GTS, perform a speaker circuit energization inspection.

      Refer to UTILITY [10/2022 - ]

      Body Electrical > Navigation System > Utility 

      Tester Display
      Speaker Line Electricity Check
    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 B1ACA-71 is output B

    Result: 

    A 

    END (FRONT NO. 1 SPEAKER ASSEMBLY RH IS DEFECTIVE) 

    Result: 

    B 

    See step  13

  13. REPLACE FRONT NO. 3 SPEAKER ASSEMBLY RH 
    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  14

  14. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. In accordance with the display of the GTS, perform a speaker circuit energization inspection.

      Refer to UTILITY [10/2022 - ]

      Body Electrical > Navigation System > Utility 

      Tester Display
      Speaker Line Electricity Check
    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 B1ACA-71 is output B

    Result: 

    A 

    END (FRONT NO. 3 SPEAKER ASSEMBLY RH IS DEFECTIVE) 

    Result: 

    B 

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

  15. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY RH) 
    1. Disconnect the M37 stereo component amplifier assembly connector.
    2. Disconnect the H72 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
      M37-13 (FR+) - H72-2 (TWR+) Always Below 1 Ω
      M37-28 (FR-) - H72-1 (TWR-) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  16

  16. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY RH 

    Refer to INSPECTION [12/2019 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

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

    Result: 

    OK 

    See step  17

  17. CHECK FOR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

    2. In accordance with the display of the GTS, perform a speaker circuit energization inspection.

      Refer to UTILITY [10/2022 - ]

      Body Electrical > Navigation System > Utility 

      Tester Display
      Speaker Line Electricity Check
    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 B1ACA-71 is output B

    Result: 

    A 

    END (FRONT NO. 2 SPEAKER ASSEMBLY RH IS DEFECTIVE) 

    Result: 

    B 

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

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