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DTC B15DB: Telematics Transceiver Disconnected [11/2018 - 10/2019]: Procedure

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  1. CHECK DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [11/2018 - 10/2019]

      Body Electrical > Navigation System > Clear DTCs 

    2. Turn the ignition switch off.
    3. Turn the ignition switch to ON and wait for 90 seconds.
    4. Recheck for DTCs and check that no DTCs are output.

      Refer to DTC CHECK / CLEAR [11/2018 - 10/2019]

      Body Electrical > Navigation System > Trouble Codes 

      OK

      No DTCs are output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

    Result: 

    NG 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] POWER SOURCE) 
    1. Disconnect the DCM (telematics transceiver) connector.
      GTY923596Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DCM [Telematics Transceiver])
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G9-4 (E) - 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
      G9-1 (+B) - G9-4 (E) Ignition switch off 11 to 14 V
      G9-8 (ACC) - G9-4 (E) Ignition switch ACC 11 to 14 V
      G9-7 (IG2) - G9-4 (E) Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE ECU WIRE [TO TRANSCEIVER]) 
    1. Disconnect the G1 radio and display receiver assembly connector.
    2. Disconnect the GG5 telephone ECU wire (To Transceiver) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G1-10 (USBV) - GG5-5 Always Below 1 Ω
      G1-11 (USBG) - GG5-3 Always Below 1 Ω
      G1-10 (USBV) or GG5-5 - Body ground Always 10 kΩ or higher
      G1-11 (USBG) or GG5-3 - 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 TELEPHONE ECU WIRE (TO TRANSCEIVER) 
    1. Disconnect the antenna connector from the DCM (telematics transceiver).
      GTY895842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DCM [Telematics Transceiver])
      *b Front view of wire harness connector
      (to Wire Harness)
    2. Disconnect the antenna connector from the wire harness.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G123-5 (USBV) - GG5-5 Always Below 1 Ω
      G123-3 (USBG) - GG5-3 Always Below 1 Ω
      G123-5 (USBV) - Body ground Always 10 kΩ or higher
      G123-3 (USBG) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TELEPHONE ECU WIRE (TO TRANSCEIVER). Refer to  REMOVAL [11/2018 - 10/2019] 

    Result: 

    OK 

    See step  5

  5. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY 
    1. Disconnect the radio and display receiver assembly connector.
      GTY876798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Radio and Display Receiver Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G1-11 (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
      G1-10 (USBV) - G1-11 (USBG) Ignition switch ACC 4.75 to 5.25 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [11/2018 - 10/2022] 

    Result: 

    OK 

    See step  6

  6. INSPECT TELEPHONE ECU WIRE (TO TRANSCEIVER) (DCM [TELEMATICS TRANSCEIVER] - NAVIGATION ECU) 
    1. Disconnect the antenna connector from the DCM (telematics transceiver).
      GTY878099Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to DCM [Telematics Transceiver])
      *b Front view of wire harness connector
      (to Navigation ECU)
    2. Disconnect the antenna connector from the navigation ECU.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G123-2 (USB+) - G124-1 (USB+) Always Below 1 Ω
      G123-1 (USB-) - G124-2 (USB-) Always Below 1 Ω
      G123-6 (USBS) - G124-3 (USBS) Always Below 1 Ω
      G123-2 (USB+) or G124-1 (USB+) - Body ground Always 10 kΩ or higher
      G123-1 (USB-) or G124-2 (USB-) - Body ground Always 10 kΩ or higher
      G123-6 (USBS) or G124-3 (USBS) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TELEPHONE ECU WIRE (TO TRANSCEIVER). Refer to  REMOVAL [11/2018 - 10/2019] 

    Result: 

    OK 

    See step  7

  7. CHECK DCM (TELEMATICS TRANSCEIVER) 
    1. Replace the DCM (telematics transceiver) with a new one.

      Refer to REMOVAL [11/2018 - 10/2019]

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [11/2018 - 10/2019]

      Body Electrical > Navigation System > Clear DTCs 

    3. Turn the ignition switch off.
    4. Turn the ignition switch to ON and wait for 90 seconds.
    5. Recheck for DTCs and check that no DTCs are output.

      Refer to DTC CHECK / CLEAR [11/2018 - 10/2019]

      Body Electrical > Navigation System > Trouble Codes 

      OK

      No DTCs are output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (DCM [TELEMATICS TRANSCEIVER] IS DEFECTIVE) 

    Result: 

    NG 

    See step  8

  8. CHECK NAVIGATION ECU 
    1. Replace the navigation ECU with a new one.

      Refer to REMOVAL [11/2018 - 10/2019]

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [11/2018 - 10/2019]

      Body Electrical > Navigation System > Clear DTCs 

    3. Turn the ignition switch off.
    4. Turn the ignition switch to ON and wait for 90 seconds.
    5. Recheck for DTCs and check that no DTCs are output.

      Refer to DTC CHECK / CLEAR [11/2018 - 10/2019]

      Body Electrical > Navigation System > Trouble Codes 

      OK

      No DTCs are output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (NAVIGATION ECU IS DEFECTIVE) 

    Result: 

    NG 

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [11/2018 - 10/2022] 

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