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Home >> Lexus >> 2021 >> UX 200 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Safety Connect System (Diagnostic Codes & Symptom Tests) >> Safety Connect System >> DTC B15CB-11: Telephone Main Antenna Circuit Short to Ground; DTC B15CB13: Telephone Main Antenna Circuit Open [07/2022 - ] >> Procedure

DTC B15CB-11: Telephone Main Antenna Circuit Short to Ground; DTC B15CB13: Telephone Main Antenna Circuit Open [07/2022 - ]: Procedure

  1. CHECK DTC 
    1. Turn the ignition switch to ON and wait for 10 seconds or more.
    2. Clear the DTCs.

      Body Electrical > Telematics > Clear DTCs 

    3. 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 [10/2018 - ] 

    Result: 

    NG 

    See step  2

  2. INSPECT TELEPHONE AND GPS ANTENNA ASSEMBLY (for Roof Side) 
    1. Disconnect the telephone and GPS antenna assembly (for Roof Side) connector.
      GTY1067586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Telephone and GPS Antenna Assembly (for Roof Side))
    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 ASSEMBLY (for Roof Side). Refer to  REMOVAL [10/2018 - ] 

    Result: 

    OK 

    See step  3

  3. INSPECT TELEPHONE AND GPS ANTENNA CORD (NO. 4 ANTENNA CORD SUB-ASSEMBLY) 
    1. Disconnect the I telephone and GPS antenna cord (No. 4 antenna cord sub-assembly) connector.
      GTY1072909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected (Telephone and GPS Antenna Cord (No. 4 Antenna Cord Sub-assembly))
    2. Disconnect the H telephone and GPS antenna cord (No. 4 antenna cord sub-assembly) connector.
      GTY1135702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected (Telephone and GPS Antenna Cord (No. 4 Antenna Cord Sub-assembly))
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      I-4 - H-2 Always Below 1 Ω
      I-4 or H-2 - Body ground Always 10 kΩ or higher
      I-4a - H-2a Always Below 1 Ω
      I-4a or H-2a - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 4 ANTENNA CORD SUB-ASSEMBLY). Refer to  REMOVAL [07/2022 - ] 

    Result: 

    OK 

    See step  4

  4. INSPECT TELEPHONE AND GPS ANTENNA CORD (NO. 3 ANTENNA CORD SUB-ASSEMBLY) 
    1. Disconnect the G telephone and GPS antenna cord (No. 3 antenna cord sub-assembly) connector.
      GTY1137362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected (Telephone and GPS Antenna Cord (No. 3 Antenna Cord Sub-assembly))
    2. Disconnect the F telephone and GPS antenna cord (No. 3 antenna cord sub-assembly) connector.
      GTY1135700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected (Telephone and GPS Antenna Cord (No. 3 Antenna Cord Sub-assembly))
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G-2 - F-4 Always Below 1 Ω
      G-2 or F-4 - Body ground Always 10 kΩ or higher
      G-2a - F-4a Always Below 1 Ω
      G-2a or F-4a - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TELEPHONE AND GPS ANTENNA CORD (NO. 3 ANTENNA CORD SUB-ASSEMBLY). Refer to  REMOVAL [07/2022 - ] 

    Result: 

    OK 

    See step  5

  5. INSPECT TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY) 
    1. Disconnect the E telephone and GPS antenna cord (antenna cord sub-assembly) connector.
      GTY1135518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly))
    2. Disconnect the C telephone and GPS antenna cord (antenna cord sub-assembly) connector.
      GTY1067752Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected (Telephone and GPS Antenna Cord (Antenna Cord Sub-assembly))
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      E-4 - C-1 Always Below 1 Ω
      E-4 or C-1- Body ground Always 10 kΩ or higher
      E-4a - C-1a Always Below 1 Ω
      E-4a or C-1a - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY). Refer to  REMOVAL [07/2022 - ] 

    Result: 

    OK 

    See step  6

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

      Refer to REMOVAL [07/2022 - ]

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

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM DCM ACTIVATION. Refer to  DCM ACTIVATION [07/2022 - ] 

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