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DTC B1537-11: Telephone Sub Antenna Circuit Short to Ground; DTC B1537-13: Telephone Sub Antenna Circuit Open [12/2019 - 11/2024]: Procedure

  1. CHECK DTC 
    1. Turn the ignition switch off.
    2. Connect the GTS to the DLC3.
    3. Turn the ignition switch to ON and wait for 10 seconds or more.
    4. Turn the GTS on.
    5. Clear the DTCs.

      Body Electrical > Telematics > Clear DTCs 

    6. Check for DTCs and check that no DTCs are output.

      Body Electrical > Telematics > 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 [12/2019 - ]

    Result: 

    NG 

    See step  2

  2. INSPECT TELEPHONE AND GPS ANTENNA (FOR FRONT SIDE) 
    1. Remove the telephone and GPS antenna (for Front Side).
      GTY754079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Telephone and GPS Antenna (for Front Side))

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 - 4a Always 9 to 11 kΩ

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TELEPHONE AND GPS ANTENNA (FOR FRONT SIDE) 

    Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    OK 

    See step  3

  3. INSPECT TELEPHONE AND GPS ANTENNA CORD (NO. 2 ANTENNA CORD SUB-ASSEMBLY) 
    1. Disconnect the D telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) connector.
      GTY796434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Telephone and GPS Antenna Cord (No. 2 Antenna Cord Sub-assembly))
    2. Disconnect the A telephone and GPS antenna cord (No. 2 antenna cord sub-assembly) connector.
      GTY1118261Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Telephone and GPS Antenna Cord (No. 2 Antenna Cord Sub-assembly))
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D-4 - A-1 (TEL SUB) Always Below 1 Ω
      D-4 or A-1 (TEL SUB) - Body ground Always 10 kΩ or higher
      D-4a - A-1a Always Below 1 Ω
      D-4a or A-1a - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 2 ANTENNA CORD SUB-ASSEMBLY) 

    Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - 11/2024]

    Result: 

    OK 

    See step  4

  4. REPLACE DCM (TELEMATICS TRANSCEIVER) 
    1. Replace the DCM (telematics transceiver) with a new one.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

      NOTE:
      • The ignition switch must be off.
      • Do not exchange the DCM (telematics transceiver) with one from another vehicle.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM DCM ACTIVATION 

    Refer to DCM ACTIVATION [12/2019 - ]

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