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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different car >> Section 115 (Navigation System (2019-Early 2023) - Diagnostic Codes (2 Of 2)) >> Navigation System >> DTC B15C3: Speaker Output Short [09/2022 - 11/2022] >> Procedure

DTC B15C3: Speaker Output Short [09/2022 - 11/2022]: Procedure

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

      Result

      Result Proceed to
      w/o Stereo Component Amplifier Assembly A
      w/ Stereo Component Amplifier Assembly B

    Result: 

    B 

    See step  15

    Result: 

    A 

    See step  2

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

      Result

      Result Proceed to
      w/ Manual (SOS) Switch A
      w/o Manual (SOS) Switch B

    Result: 

    B 

    See step  10

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND) 
    1. Disconnect the I71 radio and display receiver assembly connector.
    2. Disconnect the I144 DCM (telematics transceiver) connector.
    3. Disconnect the I77 front No. 2 speaker assembly LH connector.
    4. Disconnect the M4 and N4 rear speaker assembly connectors.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I71-1 (FR+) or I144-1 (SPI+) - Body ground Always 10 kΩ or higher
      I71-6 (FR-) or I144-2 (SPI-) - Body ground Always 10 kΩ or higher
      I71-2 (FL+) or I77-4 (TWL+) - Body ground Always 10 kΩ or higher
      I71-7 (FL-) or I77-2 (TWL-) - Body ground Always 10 kΩ or higher
      I71-4 (RR+) or M4-2 - Body ground Always 10 kΩ or higher
      I71-9 (RR-) or M4-1 - Body ground Always 10 kΩ or higher
      I71-3 (RL+) or N4-2 - Body ground Always 10 kΩ or higher
      I71-8 (RL-) or N4-1 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) OR SPEAKER - BODY GROUND) 
    1. Disconnect the I144 DCM (telematics transceiver) connector.
    2. Disconnect the I76 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
      I144-3 (SPO+) or I76-4 (TWR+) - Body ground Always 10 kΩ or higher
      I144-4 (SPO-) or I76-2 (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  5

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

      Refer to REMOVAL [09/2022 - 11/2022]

    2. Measure the resistance according to the value(s) in the table below.
      GTY843490Courtesy 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 [09/2022 - 11/2022] 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY OR FRONT NO. 2 SPEAKER ASSEMBLY - BODY GROUND) 
    1. Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
    2. Disconnect the I76 and I77 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
      K1-2 or I76-3 (+) - Body ground Always 10 kΩ or higher
      K1-1 or I76-1 (-) - Body ground Always 10 kΩ or higher
      L1-2 or I77-3 (+) - Body ground Always 10 kΩ or higher
      L1-1 or I77-1 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

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

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the front No. 1 speaker assembly.

      Refer to INSPECTION [01/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  8

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

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the rear speaker assembly.

      Refer to INSPECTION [01/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  9

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

      Refer to REMOVAL [01/2019 - ]

    2. Inspect the front No. 2 speaker assembly.

      Refer to INSPECTION [01/2019 - ]

    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 RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [09/2022 - 11/2022] 

  10. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY, SPEAKERS - BODY GROUND) 
    1. Disconnect the I71 radio and display receiver assembly connector.
    2. Disconnect the I77 and I76 front No. 2 speaker assembly connector.
    3. Disconnect the M4 and N4 rear speaker assembly connectors.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I71-1 (FR+) or I76-4 (TWR+) - Body ground Always 10 kΩ or higher
      I71-6 (FR-) or I76-2 (TWR-) - Body ground Always 10 kΩ or higher
      I71-2 (FL+) or I77-4 (TWL+) - Body ground Always 10 kΩ or higher
      I71-7 (FL-) or I77-2 (TWL-) - Body ground Always 10 kΩ or higher
      I71-4 (RR+) or M4-2 - Body ground Always 10 kΩ or higher
      I71-9 (RR-) or M4-1 - Body ground Always 10 kΩ or higher
      I71-3 (RL+) or N4-2 - Body ground Always 10 kΩ or higher
      I71-8 (RL-) or N4-1 - 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 OR FRONT NO. 2 SPEAKER ASSEMBLY - BODY GROUND) 
    1. Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
    2. Disconnect the I76 and I77 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
      K1-2 or I76-3 (+) - Body ground Always 10 kΩ or higher
      K1-1 or I76-1 (-) - Body ground Always 10 kΩ or higher
      L1-2 or I77-3 (+) - Body ground Always 10 kΩ or higher
      L1-1 or I77-1 (-) - 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 
    1. Remove the front No. 1 speaker assembly.

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the front No. 1 speaker assembly.

      Refer to INSPECTION [01/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  13

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

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the rear speaker assembly.

      Refer to INSPECTION [01/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  14

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

      Refer to REMOVAL [01/2019 - ]

    2. Inspect the front No. 2 speaker assembly.

      Refer to INSPECTION [01/2019 - ]

    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 RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [09/2022 - 11/2022] 

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

      Result

      Result Proceed to
      for 9 Speakers with Manual (SOS) Switch A
      for 9 Speakers without Manual (SOS) Switch B

    Result: 

    B 

    See step  19

    Result: 

    A 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND) 
    1. Disconnect the I54 stereo component amplifier assembly connector.
    2. Disconnect the I144 DCM (telematics transceiver) connector.
    3. Disconnect the I7 front No. 2 speaker assembly LH connector.
    4. Disconnect the I74 and I75 front No. 3 speaker assembly connectors.
    5. Disconnect the M4 and N4 rear speaker assembly connectors.
    6. Disconnect the O71 rear No. 2 speaker assembly connector.
    7. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I54-14 (TWR+) or I144-1 (SPI+) - Body ground Always 10 kΩ or higher
      I54-29 (TWR-) or I144-2 (SPI-) - Body ground Always 10 kΩ or higher
      I54-12 (TWL+) or I7-2 (TWL+) - Body ground Always 10 kΩ or higher
      I54-27 (TWL-) or I7-1 (TWL-) - Body ground Always 10 kΩ or higher
      I54-15 (FR+) or I74-4 (+TW) - Body ground Always 10 kΩ or higher
      I54-30 (FR-) or I74-2 (-TW) - Body ground Always 10 kΩ or higher
      I54-13 (FL+) or I75-4 (+TW) - Body ground Always 10 kΩ or higher
      I54-28 (FL-) or I75-2 (-TW) - Body ground Always 10 kΩ or higher
      I54-11 (RR+) or M4-2 - Body ground Always 10 kΩ or higher
      154-26 (RR-) or M4-1 - Body ground Always 10 kΩ or higher
      I54-9 (RL+) or N4-2 - Body ground Always 10 kΩ or higher
      I54-24 (RL-) or N4-1 - Body ground Always 10 kΩ or higher
      I54-10 (WF1+) or O71-4 (WF1+) - Body ground Always 10 kΩ or higher
      I54-25 (WF1-) or O71-3 (WF1-) - Body ground Always 10 kΩ or higher
      I54-8 (WF2+) or O71-2 (WF2+) - Body ground Always 10 kΩ or higher
      I54-23 (WF2-) or O71-1 (WF2-) - 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) OR SPEAKER - BODY GROUND) 
    1. Disconnect the I144 DCM (telematics transceiver) connector.
    2. Disconnect the I6 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
      I144-3 (SPO+) or I6-2 - Body ground Always 10 kΩ or higher
      I144-4 (SPO-) or I6-1 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  18

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

      Refer to REMOVAL [09/2022 - 11/2022]

    2. Measure the resistance according to the value(s) in the table below.
      GTY843491Courtesy 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: 

    OK 

    See step  20

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [09/2022 - 11/2022] 

  19. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY OR SPEAKERS - BODY GROUND) 
    1. Disconnect the I54 stereo component amplifier assembly connector.
    2. Disconnect the I74 and I75 front No. 3 speaker assembly connectors.
    3. Disconnect the I6 and I7 front No. 2 speaker assembly connectors.
    4. Disconnect the M4 and N4 rear speaker assembly connectors.
    5. Disconnect the O71 rear No. 2 speaker assembly connector.
    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I54-15 (FR+) or I74-4 (+TW) - Body ground Always 10 kΩ or higher
      I54-30 (FR-) or I74-2 (-TW) - Body ground Always 10 kΩ or higher
      I54-13 (FL+) or I75-4 (+TW) - Body ground Always 10 kΩ or higher
      I54-28 (FL-) or I75-2 (-TW) - Body ground Always 10 kΩ or higher
      I54-14 (TWR+) or I6-2 - Body ground Always 10 kΩ or higher
      I54-29 (TWR-) or I6-1 - Body ground Always 10 kΩ or higher
      I54-12 (TWL+) or I7-2 - Body ground Always 10 kΩ or higher
      I54-27 (TWL-) or I7-1 - Body ground Always 10 kΩ or higher
      I54-11 (RR+) or M4-2 - Body ground Always 10 kΩ or higher
      I54-26 (RR-) or M4-1 - Body ground Always 10 kΩ or higher
      I54-9 (RL+) or N4-2 - Body ground Always 10 kΩ or higher
      I54-24 (RL-) or N4-1 - Body ground Always 10 kΩ or higher
      I54-10 (WF1+) or O71-4 (WF1+) - Body ground Always 10 kΩ or higher
      I54-25 (WF1-) or O71-3 (WF1-) - Body ground Always 10 kΩ or higher
      I54-8 (WF2+) or O71-2 (WF2+) - Body ground Always 10 kΩ or higher
      I54-23 (WF2-) or O71-1 (WF2-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  20

  20. CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY OR FRONT NO. 3 SPEAKER ASSEMBLY - BODY GROUND) 
    1. Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
    2. Disconnect the I74 and I75 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
      K1-2 or I74-3 (+) - Body ground Always 10 kΩ or higher
      K1-1 or I74-1 (-) - Body ground Always 10 kΩ or higher
      L1-2 or I75-3 (+) - Body ground Always 10 kΩ or higher
      L1-1 or I75-1 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  21

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

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the front No. 1 speaker assembly.

      Refer to INSPECTION [01/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  22

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

      Refer to REMOVAL [01/2019 - ]

    2. Inspect the front No. 2 speaker assembly.

      Refer to INSPECTION [01/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to  REMOVAL [01/2019 - ] 

    Result: 

    OK 

    See step  23

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

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the rear speaker assembly.

      Refer to INSPECTION [01/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

    Result: 

    OK 

    See step  24

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

      Refer to REMOVAL [09/2022 - ]

    2. Inspect the rear No. 2 speaker assembly.

      Refer to INSPECTION [01/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR NO. 2 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    OK 

    See step  25

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

      Refer to REMOVAL [06/2018 - ]

    2. Inspect the front No. 3 speaker assembly.

      Refer to INSPECTION [06/2018 - ]

    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 [09/2022 - 11/2022] 

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