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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Navigation System (12.3 Inch Display) - Diagnostic Codes >> NAVIGATION SYSTEM (for 12.3 Inch Display) >> DTC B15C3: Speaker Output Short [12/2019 - 10/2022] >> Procedure

DTC B15C3: Speaker Output Short [12/2019 - 10/2022]: Procedure

  1. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND) 
    1. Disconnect the M37 stereo component amplifier assembly connector.
    2. Disconnect the H12 DCM (telematics transceiver) connector.
    3. Disconnect the H74 front No. 2 speaker assembly LH 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
      M37-14 (TWR+) or H12-1 (SPI+) - Body ground Always 10 kΩ or higher
      M37-29 (TWR-) or H12-2 (SPI-) - Body ground Always 10 kΩ or higher
      M37-13 (TWL+) or H74-2 (TWL+) - Body ground Always 10 kΩ or higher
      M37-28 (TWL-) or H74-1 (TWL-) - Body ground Always 10 kΩ or higher
      M37-15 (FR+) or H13-4 (+) - Body ground Always 10 kΩ or higher
      M37-30 (FR-) or H13-2 (-) - Body ground Always 10 kΩ or higher
      M37-11 (FL+) or H14-4 (+) - Body ground Always 10 kΩ or higher
      M37-26 (FL-) or H14-2 (-) - Body ground Always 10 kΩ or higher
      M37-12 (RR+) or K1-1 - Body ground Always 10 kΩ or higher
      M37-27 (RR-) or K1-2 - Body ground Always 10 kΩ or higher
      M37-4 (RL+) or K6-1 - Body ground Always 10 kΩ or higher
      M37-19 (RL-) or K6-2 - Body ground Always 10 kΩ or higher
      M37-8 (WF1+) or M36-4 (WF1+) - Body ground Always 10 kΩ or higher
      M37-23 (WF1-) or M36-3 (WF1-) - Body ground Always 10 kΩ or higher
      M37-7 (WF2+) or M36-2 (WF2+) - Body ground Always 10 kΩ or higher
      M37-22 (WF2-) or M36-1 (WF2-) - Body ground Always 10 kΩ or higher
      M37-9 (SR+) or W22-2 - Body ground Always 10 kΩ or higher
      M37-24 (SR-) or W22-1 - Body ground Always 10 kΩ or higher
      M37-5 (SL+) or W23-2 - Body ground Always 10 kΩ or higher
      M37-20 (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  2

  2. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) OR SPEAKER - BODY GROUND) 
    1. Disconnect the H12 DCM (telematics transceiver) 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
      H12-3 (SPO+) or H72-2 (TWR+) - Body ground Always 10 kΩ or higher
      H12-4 (SPO-) or H72-1 (TWR-) - 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. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Remove the DCM (telematics transceiver).

      Refer to REMOVAL [12/2019 - 10/2022]

    2. Measure the resistance according to the value(s) in the table below.
      GTY843494Courtesy 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 [12/2019 - 10/2022] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY OR FRONT NO. 3 SPEAKER ASSEMBLY - BODY GROUND) 
    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
      J1-2 or H13-3 (+) - Body ground Always 10 kΩ or higher
      J1-1 or H13-1 (-) - Body ground Always 10 kΩ or higher
      J17-2 or H14-3 (+) - Body ground Always 10 kΩ or higher
      J17-1 or H14-1 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY 
    1. Remove the front No. 1 speaker assembly.

      Refer to REMOVAL [12/2019 - ]

    2. Inspect the 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 FRONT NO. 2 SPEAKER ASSEMBLY 
    1. Remove the front No. 2 speaker assembly.

      Refer to REMOVAL [12/2019 - ]

    2. Inspect the 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  7

  7. INSPECT REAR SPEAKER ASSEMBLY 
    1. Remove the rear speaker assembly.

      Refer to REMOVAL [12/2019 - ]

    2. Inspect the 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  8

  8. INSPECT REAR NO. 2 SPEAKER ASSEMBLY 
    1. Remove the rear No. 2 speaker assembly.

      Refer to REMOVAL [12/2019 - ]

    2. Inspect the 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  9

  9. INSPECT REAR NO. 3 SPEAKER ASSEMBLY 
    1. Remove the rear No. 3 speaker assembly.

      Refer to REMOVAL [12/2019 - ]

    2. Inspect the 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  10

  10. REPLACE FRONT NO. 3 SPEAKER ASSEMBLY 
    1. Remove the front No. 3 speaker assembly.

      Refer to REMOVAL [12/2019 - ]

    2. Inspect the front No. 3 speaker assembly.

      Refer to INSPECTION [12/2019 - ]

    3. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

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

      Body Electrical > Navigation System > Trouble Codes 

      OK

      No DTCs are output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

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

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