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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio / Video System - Diagnostic Codes (2 Of 3) >> Audio And Visual System >> DTC B1ACA-71: Front Right Speaker Cable Actuator Stuck [10/2022 - ] >> Procedure

DTC B1ACA-71: Front Right Speaker Cable Actuator Stuck [10/2022 - ]: 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 A
      No sound is output from the front No. 2 speaker assembly RH B

    Result: 

    B 

    See step  7

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY RH) 

    Pre-procedure1

    1. Disconnect the L52 stereo component amplifier assembly connector.
    2. Disconnect the H1 front No. 1 speaker assembly RH connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      L52-5 (WFR+) - H1-2 (+) Always Below 1 Ω
      L52-20 (WFR-) - H1-1 (-) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY RH 

    Refer to INSPECTION [10/2017 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY RH. Refer to  REMOVAL [10/2017 - ] 

    Result: 

    OK 

    See step  4

  4. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. SPEAKER LINE ELECTRICITY CHECK 
    1. In accordance with the display of the GTS, perform a speaker line electricity check.

      Body Electrical > Navigation System > Utility 

      Tester Display
      Speaker Line Electricity Check

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  6

  6. CHECK FOR DTC 
    1. 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 

    Result: 

    B 

    REPLACE STEREO COMPONENT AMPLIFIER. Refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

  7. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY RH) 

    Pre-procedure1

    1. Disconnect the L52 stereo component amplifier assembly connector.
    2. Disconnect the G69 front No. 2 speaker assembly RH connector.
    3. Disconnect the G165 DCM (telematics transceiver) connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      L52-13 (FR+) - G165-1 (SPI+) Always Below 1 Ω
      L52-28 (FR-) - G165-2 (SPI-) Always Below 1 Ω
      G165-3 (SPO+) - G69-2 (+) Always Below 1 Ω
      G165-4 (SPO-) - G69-1 (-) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    5. None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. INSPECT DCM (TELEMATICS TRANSCEIVER) (SPO+, SPO-, SPI+, SPI-) 

    Pre-procedure1

    1. Remove the telephone transceiver assembly.
      GTY1039163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DCM [Telematics Transceiver])

      HINT: 

      Refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

      Procedure1

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

      Standard Resistance

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

      Post-procedure1

    3. None

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  9

  9. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY RH 
    1. Replace the front No. 2 speaker assembly RH with a new or known good one.

      Refer to REMOVAL [10/2017 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  10

  10. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  11

  11. SPEAKER LINE ELECTRICITY CHECK 
    1. In accordance with the display of the GTS, perform a speaker line electricity check.

      Body Electrical > Navigation System > Utility 

      Tester Display
      Speaker Line Electricity Check

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  12

  12. CHECK FOR DTC 
    1. 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. Refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

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