LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2021 >> RC 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Navigation System - Diagnostic Codes (1 Of 2) >> Navigation System >> DTC B15C3: Speaker Output Short [11/2017 - 11/2019] >> Procedure

DTC B15C3: Speaker Output Short [11/2017 - 11/2019]: Procedure

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

      Result

      Result Proceed to
      for 10 Speakers (w/ Manual (SOS) Switch) A
      for 10 Speakers (w/o Manual (SOS) Switch) B
      for 17 Speakers (w/ Manual (SOS) Switch) C
      for 17 Speakers (w/o Manual (SOS) Switch) D

    Result: 

    B 

    See step  5

    Result: 

    C 

    See step  11

    Result: 

    D 

    See step  15

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - BODY GROUND) 
    1. Disconnect the T20 stereo component amplifier assembly connector.
    2. Disconnect the O65 DCM (telematics transceiver) connector.
    3. Disconnect the O55 front No. 2 speaker assembly LH connector.
    4. Disconnect the R14 and S14 front No. 1 speaker assembly connectors.
    5. Disconnect the O56 front No. 3 speaker assembly connector.
    6. Disconnect the T25 and U35 rear speaker assembly connectors.
    7. Disconnect the T24 rear No. 3 speaker assembly connector.
    8. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      T20-13 (FR+) or O65-2 (SPI+) - Body ground Always 10 kΩ or higher
      T20-28 (FR-) or O65-3 (SPI-) - Body ground Always 10 kΩ or higher
      T20-12 (FL+) or O55-2 (+) - Body ground Always 10 kΩ or higher
      T20-27 (FL-) or O55-1 (-) - Body ground Always 10 kΩ or higher
      T20-5 (WFR+) or R14-1 - Body ground Always 10 kΩ or higher
      T20-20 (WFR-) or R14-2 - Body ground Always 10 kΩ or higher
      T20-4 (WFL+) or S14-1 - Body ground Always 10 kΩ or higher
      T20-19 (WFL-) or S14-2 - Body ground Always 10 kΩ or higher
      T20-7 (CTR+) or O56-2 (+) - Body ground Always 10 kΩ or higher
      T20-22 (CTR-) or O56-1 (-) - Body ground Always 10 kΩ or higher
      T20-9 (RR+) or T25-1 - Body ground Always 10 kΩ or higher
      T20-24 (RR-) or T25-2 - Body ground Always 10 kΩ or higher
      T20-8 (RL+) or U35-1 - Body ground Always 10 kΩ or higher
      T20-23 (RL-) or U35-2 - Body ground Always 10 kΩ or higher
      T20-6 (WF1+) or T24-1 - Body ground Always 10 kΩ or higher
      T20-21 (WF1-) or T24-2 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - BODY GROUND) 
    1. Disconnect the O65 DCM (telematics transceiver) connector.
    2. Disconnect the O54 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
      O65-5 (SPO+) or O54-2 (+) - Body ground Always 10 kΩ or higher
      O65-6 (SPO-) or O54-1 (-) - 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. INSPECT DCM (TELEMATICS TRANSCEIVER) 
    1. Remove the DCM (telematics transceiver).

      Refer to REMOVAL [11/2017 - 11/2019]

    2. Measure the resistance according to the value(s) in the table below.
      GTY450683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DCM (Telematics Transceiver))

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (SPI+) - 5 (SPO+) Always Below 1 Ω
      3 (SPI-) - 6 (SPO-) Always Below 1 Ω
      2 (SPI+) - 3 (SPI-) Always 10 kΩ or higher
      5 (SPO+) - 6 (SPO-) Always 10 kΩ or higher
      2 (SPI+) - Body ground Always 10 kΩ or higher
      3 (SPI-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    See step  10

    Result: 

    NG 

    REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to  REMOVAL [11/2017 - 11/2019] 

  5. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - BODY GROUND) 
    1. Disconnect the T20 stereo component amplifier assembly connector.
    2. Disconnect the O54 and O55 front No. 2 speaker assembly connectors.
    3. Disconnect the R14 and S14 front No. 1 speaker assembly connectors.
    4. Disconnect the O56 front No. 3 speaker assembly connector.
    5. Disconnect the T25 and U35 rear speaker assembly connectors.
    6. Disconnect the T24 rear No. 3 speaker assembly connector.
    7. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      T20-13 (FR+) or O54-2 (+) - Body ground Always 10 kΩ or higher
      T20-28 (FR-) or O54-1 (-) - Body ground Always 10 kΩ or higher
      T20-12 (FL+) or O55-2 (+) - Body ground Always 10 kΩ or higher
      T20-27 (FL-) or O55-1 (-) - Body ground Always 10 kΩ or higher
      T20-5 (WFR+) or R14-1 - Body ground Always 10 kΩ or higher
      T20-20 (WFR-) or R14-2 - Body ground Always 10 kΩ or higher
      T20-4 (WFL+) or S14-1 - Body ground Always 10 kΩ or higher
      T20-19 (WFL-) or S14-2 - Body ground Always 10 kΩ or higher
      T20-7 (CTR+) or O56-2 (+) - Body ground Always 10 kΩ or higher
      T20-22 (CTR-) or O56-1 (-) - Body ground Always 10 kΩ or higher
      T20-9 (RR+) or T25-1 - Body ground Always 10 kΩ or higher
      T20-24 (RR-) or T25-2 - Body ground Always 10 kΩ or higher
      T20-8 (RL+) or U35-1 - Body ground Always 10 kΩ or higher
      T20-23 (RL-) or U35-2 - Body ground Always 10 kΩ or higher
      T20-6 (WF1+) or T24-1 - Body ground Always 10 kΩ or higher
      T20-21 (WF1-) or T24-2 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the front No. 1 speaker assembly.

      Refer to INSPECTION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  7

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the rear speaker assembly.

      Refer to INSPECTION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  8

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the rear No. 3 speaker assembly.

      Refer to INSPECTION [08/2016 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR NO. 3 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  9

  9. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY 
    1. Remove the front No. 3 speaker assembly.

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the front No. 3 speaker assembly.

      Refer to INSPECTION [08/2016 - 10/2022]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  10

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the front No. 2 speaker assembly.

      Refer to INSPECTION [08/2016 - 10/2022]

    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 [09/2014 - ] 

  11. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - BODY GROUND) 
    1. Disconnect the T20 stereo component amplifier assembly connector.
    2. Disconnect the O65 DCM (telematics transceiver) connector.
    3. Disconnect the O55 front No. 2 speaker assembly LH connector.
    4. Disconnect the R14 and S14 front No. 1 speaker assembly connectors.
    5. Disconnect the O56 front No. 3 speaker assembly connector.
    6. Disconnect the T26 and U36 rear No. 2 speaker assembly connectors.
    7. Disconnect the T23 and U34 rear header speaker assembly connectors.
    8. Disconnect the T24 rear No. 3 speaker assembly connector.
    9. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      T20-13 (FR+) or O65-2 (SPI+) - Body ground Always 10 kΩ or higher
      T20-28 (FR-) or O65-3 (SPI-) - Body ground Always 10 kΩ or higher
      T20-12 (FL+) or O55-2 (+) - Body ground Always 10 kΩ or higher
      T20-27 (FL-) or O55-1 (-) - Body ground Always 10 kΩ or higher
      T20-5 (WFR+) or R14-1 - Body ground Always 10 kΩ or higher
      T20-20 (WFR-) or R14-2 - Body ground Always 10 kΩ or higher
      T20-4 (WFL+) or S14-1 - Body ground Always 10 kΩ or higher
      T20-19 (WFL-) or S14-2 - Body ground Always 10 kΩ or higher
      T20-7 (CTR+) or O56-2 (+) - Body ground Always 10 kΩ or higher
      T20-22 (CTR-) or O56-1 (-) - Body ground Always 10 kΩ or higher
      T20-9 (RR+) or T26-3 (+TW) - Body ground Always 10 kΩ or higher
      T20-24 (RR-) or T26-1 (-TW) - Body ground Always 10 kΩ or higher
      T20-8 (RL+) or U36-3 (+TW) - Body ground Always 10 kΩ or higher
      T20-23 (RL-) or U36-1 (-TW) - Body ground Always 10 kΩ or higher
      T20-11 (SR+) or T23-2 (+) - Body ground Always 10 kΩ or higher
      T20-26 (SR-) or T23-1 (-) - Body ground Always 10 kΩ or higher
      T20-10 (SL+) or U34-2 (+) - Body ground Always 10 kΩ or higher
      T20-25 (SL-) or U34-1 (-) - Body ground Always 10 kΩ or higher
      T20-6 (WF1+) or T24-1 - Body ground Always 10 kΩ or higher
      T20-21 (WF1-) or T24-2 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - BODY GROUND) 
    1. Disconnect the O65 DCM (telematics transceiver) connector.
    2. Disconnect the O54 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
      O65-5 (SPO+) or O54-2 (+) - Body ground Always 10 kΩ or higher
      O65-6 (SPO-) or O54-1 (-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  13

  13. CHECK HARNESS AND CONNECTOR (REAR NO. 2 SPEAKER ASSEMBLY - BODY GROUND) 
    1. Disconnect the T25 and U35 rear speaker assembly connectors.
    2. Disconnect the T26 and U36 rear 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
      T26-4 (+) or T25-1 - Body ground Always 10 kΩ or higher
      T26-2 (-) or T25-2 - Body ground Always 10 kΩ or higher
      U36-4 (+) or U35-1 - Body ground Always 10 kΩ or higher
      U36-2 (-) or U35-2 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  14

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

      Refer to REMOVAL [11/2017 - 11/2019]

    2. Measure the resistance according to the value(s) in the table below.
      GTY450683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (DCM (Telematics Transceiver))

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 (SPI+) - 5 (SPO+) Always Below 1 Ω
      3 (SPI-) - 6 (SPO-) Always Below 1 Ω
      2 (SPI+) - 3 (SPI-) Always 10 kΩ or higher
      5 (SPO+) - 6 (SPO-) Always 10 kΩ or higher
      2 (SPI+) - Body ground Always 10 kΩ or higher
      3 (SPI-) - 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 [11/2017 - 11/2019] 

  15. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - BODY GROUND) 
    1. Disconnect the T20 stereo component amplifier assembly connector.
    2. Disconnect the O54 and O55 front No. 2 speaker assembly connectors.
    3. Disconnect the R14 and S14 front No. 1 speaker assembly connectors.
    4. Disconnect the O56 front No. 3 speaker assembly connector.
    5. Disconnect the T26 and U36 rear No. 2 speaker assembly connectors.
    6. Disconnect the T23 and U34 rear header speaker assembly connectors.
    7. Disconnect the T24 rear No. 3 speaker assembly connector.
    8. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      T20-13 (FR+) or O54-2 (+) - Body ground Always 10 kΩ or higher
      T20-28 (FR-) or O54-1 (-) - Body ground Always 10 kΩ or higher
      T20-12 (FL+) or O55-2 (+) - Body ground Always 10 kΩ or higher
      T20-27 (FL-) or O55-1 (-) - Body ground Always 10 kΩ or higher
      T20-5 (WFR+) or R14-1 - Body ground Always 10 kΩ or higher
      T20-20 (WFR-) or R14-2 - Body ground Always 10 kΩ or higher
      T20-4 (WFL+) or S14-1 - Body ground Always 10 kΩ or higher
      T20-19 (WFL-) or S14-2 - Body ground Always 10 kΩ or higher
      T20-7 (CTR+) or O56-2 (+) - Body ground Always 10 kΩ or higher
      T20-22 (CTR-) or O56-1 (-) - Body ground Always 10 kΩ or higher
      T20-9 (RR+) or T26-3 (+TW) - Body ground Always 10 kΩ or higher
      T20-24 (RR-) or T26-1 (-TW) - Body ground Always 10 kΩ or higher
      T20-8 (RL+) or U36-3 (+TW) - Body ground Always 10 kΩ or higher
      T20-23 (RL-) or U36-1 (-TW) - Body ground Always 10 kΩ or higher
      T20-11 (SR+) or T23-2 (+) - Body ground Always 10 kΩ or higher
      T20-26 (SR-) or T23-1 (-) - Body ground Always 10 kΩ or higher
      T20-10 (SL+) or U34-2 (+) - Body ground Always 10 kΩ or higher
      T20-25 (SL-) or U34-1 (-) - Body ground Always 10 kΩ or higher
      T20-6 (WF1+) or T24-1 - Body ground Always 10 kΩ or higher
      T20-21 (WF1-) or T24-2 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  16

  16. CHECK HARNESS AND CONNECTOR (REAR NO. 2 SPEAKER ASSEMBLY - BODY GROUND) 
    1. Disconnect the T25 and U35 rear speaker assembly connectors.
    2. Disconnect the T26 and U36 rear 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
      T26-4 (+) or T25-1 - Body ground Always 10 kΩ or higher
      T26-2 (-) or T25-2 - Body ground Always 10 kΩ or higher
      U36-4 (+) or U35-1 - Body ground Always 10 kΩ or higher
      U36-2 (-) or U35-2 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  17

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the front No. 1 speaker assembly.

      Refer to INSPECTION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  18

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the rear speaker assembly.

      Refer to INSPECTION [09/2014 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  19

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the rear No. 3 speaker assembly.

      Refer to INSPECTION [08/2016 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR NO. 3 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  20

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the front No. 2 speaker assembly.

      Refer to INSPECTION [08/2016 - 10/2022]

    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: 

    NG 

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  21

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

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the front No. 3 speaker assembly.

      Refer to INSPECTION [08/2016 - 10/2022]

    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: 

    NG 

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  22

  22. REPLACE REAR NO. 2 SPEAKER ASSEMBLY 
    1. Remove the rear No. 2 speaker assembly.

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the rear No. 2 speaker assembly.

      Refer to INSPECTION [09/2014 - ]

    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: 

    NG 

    REPLACE REAR NO. 2 SPEAKER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  23

  23. REPLACE REAR HEADER SPEAKER ASSEMBLY 
    1. Remove the rear header speaker assembly.

      Refer to REMOVAL [09/2014 - ]

    2. Inspect the rear header speaker assembly.

      Refer to INSPECTION [08/2016 - ]

    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 [09/2014 - ] 

scientia non olet · About LEMON Manuals