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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Audio / Video System - Diagnostic Codes (1 Of 2) >> Audio And Visual System >> DTC B15DB-87: Telematics Transceiver Missing Message [11/2023 - ] >> Procedure

DTC B15DB-87: Telematics Transceiver Missing Message [11/2023 - ]: Procedure

  1. CHECK DTC 

    Pre-procedure1

    1. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

      Procedure1

    2. Check for DTCs.

      Body Electrical > Navigation System > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output OK
      DTCs are output NG

      Post-procedure1

    3. None

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

    Result: 

    NG 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] POWER SOURCE) 

    Pre-procedure1

    1. Disconnect the H11 DCM (telematics transceiver) connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-20 (E) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H11-1 (+B) - H11-20 (E) Ignition switch off 11 to 14 V*1
      10.5 to 16 V*2
      H11-19 (IG2) - H11-20 (E) Ignition switch ON 11 to 14 V*1
      10.5 to 16 V*2
      1. *1: w/o Stop and Start System
      2. *2: w/ Stop and Start System

      Result

      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System) C

      Post-procedure1

    4. None

    Result: 

    B 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    C 

    GO TO STOP AND START SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER]) 

    Pre-procedure1

    1. Disconnect the H108 radio and display receiver assembly connector.
    2. Disconnect the H11 DCM (telematics transceiver) connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H108-18 (USBV) - H11-15 (USBV) Always Below 1 Ω
      H108-17 (USBG) - H11-31 (USBG) Always Below 1 Ω
      H108-18 (USBV) - Body ground Always 10 kΩ or higher
      H108-17 (USBG) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (USBV, USBG) 

    Pre-procedure1

    1. With the radio and display receiver assembly connectors connected, disconnect the H11 DCM (telematics transceiver) connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H11-31 (USBG) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      H11-15 (USBV) - H11-31 (USBG) Ignition switch ON 3 V or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

    Result: 

    OK 

    See step  5

  5. CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER]) 

    Pre-procedure1

    1. Disconnect the c6 radio and display receiver assembly connector.
      GTY1179524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of No. 2 antenna cord sub-assembly
      (to Radio and Display Receiver Assembly)
      *b Front view of No. 2 antenna cord sub-assembly
      (to DCM (Telematics Transceiver))
    2. Disconnect the c7 DCM (telematics transceiver) connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      c6-1 (USB-) - c7-2 (US4+) Always Below 1 Ω
      c6-2 (USB+) - c7-1 (US4-) Always Below 1 Ω
      c6-3 (USBS) - c7-3 (UGD4) Always Below 1 Ω
      c6-1 (USB-) or c7-2 (US4+) - Body ground Always 10 kΩ or higher
      c6-2 (USB+) or c7-1 (US4-) - Body ground Always 10 kΩ or higher
      c6-3 (USBS) or c7-3 (UGD4) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    NG 

    REPLACE NO. 2 ANTENNA CORD SUB-ASSEMBLY 

    Refer to REMOVAL [11/2023 - 11/2024] , or refer to REMOVAL [11/2024 - ]

    Result: 

    OK 

    See step  6

  6. REPLACE DCM (TELEMATICS TRANSCEIVER) 

    Pre-procedure1

    1. Replace the DCM (telematics transceiver) with a new one.

      HINT: 

      Refer to REMOVAL [11/2023 - ]

    2. Clear the DTCs.

      Body Electrical > Navigation System > Clear DTCs 

      Procedure1

    3. Check for DTCs.

      Body Electrical > Navigation System > Trouble Codes 

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    OK 

    END (DCM [TELEMATICS TRANSCEIVER] IS DEFECTIVE) 

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

    Refer to REMOVAL [11/2023 - ]

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