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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Safety Connect System - Diagnostic Codes (2 Of 2) & Symptom Tests >> Safety Connect System >> DTC B15C1-11: GNSS Antenna Circuit Short to Ground; DTC B15C1-13: GNSS Antenna Circuit Open [10/2022 - ] >> Procedure

DTC B15C1-11: GNSS Antenna Circuit Short to Ground; DTC B15C1-13: GNSS Antenna Circuit Open [10/2022 - ]: Procedure

  1. CLEAR DTC 

    Pre-procedure1

    1. Turn the ignition switch to ON and wait for 10 seconds.

      Procedure1

    2. Clear the DTCs.

      Body Electrical > Telematics > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    3. None

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Telematics > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

    Result: 

    B 

    See step  3

  3. INSPECT TELEPHONE AND GPS ANTENNA (FOR ROOF SIDE) 

    Pre-procedure1

    1. Remove the telephone and GPS antenna (for roof side).
      GTY969849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      2 - 2a Always 4 to 11 kΩ

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. None

    Result: 

    NG 

    REPLACE TELEPHONE AND GPS ANTENNA (ROOF ANTENNA ASSEMBLY). Refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  4

  4. INSPECT TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY [FLOOR]) 

    Pre-procedure1

    1. Disconnect the antenna connector from the telephone and GPS antenna (for roof side).
      GTY970199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Telephone and GPS Antenna [for Roof Side])
      *b Front view of wire harness connector
      (to Wire Harness)
    2. Disconnect the antenna connector from the wire harness.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A-2 - G153-[2] (ANT2) Always Below 1 Ω
      A-2a - G153-[2a] Always Below 1 Ω
      A-2 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    NG 

    REPLACE TELEPHONE AND GPS ANTENNA CORD (ANTENNA CORD SUB-ASSEMBLY [FLOOR]). Refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  5

  5. CHECK VEHICLE TYPE 
    1. Check the vehicle type.

      Result

      Result Proceed to
      w/o Advanced Drive System A
      w/ Advanced Drive System B

    Result: 

    B 

    See step  11

    Result: 

    A 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (ANTENNA CORD SUB-ASSEMBLY [FLOOR] - DCM [TELEMATICS TRANSCEIVER]) 

    Pre-procedure1

    1. Disconnect the antenna connector from the antenna cord sub-assembly (floor).
      GTY971751Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Antenna Cord Sub-assembly [Floor])
      *b Front view of wire harness connector
      (to DCM [Telematics Transceiver])
    2. Disconnect the antenna connector from the DCM (telematics transceiver).

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      G153-2 (ANT2) - G176-1 (ANT2) Always Below 1 Ω
      G153-[2a] - G176-[1a] Always Below 1 Ω
      G153-2 (ANT2) - 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  7

  7. CHECK TELEPHONE AND GPS ANTENNA (FOR ROOF SIDE) 
    1. Replace the telephone and GPS antenna (for roof side) with a known good one.

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

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Telematics > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  9

  9. CHECK FOR DTC 
    1. Recheck for DTCs and check that no DTCs are output.

      Body Electrical > Telematics > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    A 

    END (TELEPHONE AND GPS ANTENNA [FOR ROOF SIDE] IS DEFECTIVE) 

    Result: 

    B 

    See step  10

  10. REPLACE DCM (TELEMATICS TRANSCEIVER) 
    1. Replace the DCM (Telematics Transceiver).

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

      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 [10/2022 - ] 

  11. CHECK HARNESS AND CONNECTOR (ANTENNA CORD SUB-ASSEMBLY [FLOOR] - ANTENNA DIVIDER) 

    Pre-procedure1

    1. Disconnect the antenna connector from the antenna cord sub-assembly (Floor).
      GTY970831Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Antenna Cord Sub-assembly [Floor])
      *b Front view of wire harness connector
      (to Antenna Divider)
    2. Disconnect the antenna connector from the antenna divider.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      G153-2 (ANT2) - C-5 Always Below 1 Ω
      G153-[2a] - C-5a Always Below 1 Ω
      G153-2 (ANT2) - 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  12

  12. CHECK HARNESS AND CONNECTOR (ANTENNA DIVIDER - DCM [TELEMATICS TRANSCEIVER]) 

    Pre-procedure1

    1. Disconnect the antenna connector from the antenna divider.
      GTY971670Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Antenna Divider)
      *b Front view of wire harness connector
      (to DCM [Telematics Transceiver])
    2. Disconnect the antenna connector from the DCM (telematics transceiver).

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      C-6 - G176-1 (ANT2) Always Below 1 Ω
      C-6a - G176-[1a] Always Below 1 Ω
      C-6 - 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  13

  13. INSPECT ANTENNA DIVIDER 

    Pre-procedure1

    1. Remove the antenna divider.

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

      GTY958934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Antenna Divider)

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      5 - 6 Always Below 1 Ω
      5a - 6a Always Below 1 Ω
      5 - 5a Always 10 kΩ or higher
      6 - 6a Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. None

    Result: 

    NG 

    REPLACE ANTENNA DIVIDER. Refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

    Result: 

    OK 

    See step  14

  14. CHECK TELEPHONE AND GPS ANTENNA (FOR ROOF SIDE) 
    1. Replace the telephone and GPS antenna (for roof side) with a known good one.

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

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  15

  15. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Telematics > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  16

  16. CHECK FOR DTC 
    1. Recheck for DTCs and check that no DTCs are output.

      Body Electrical > Telematics > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    A 

    END (TELEPHONE AND GPS ANTENNA [FOR ROOF SIDE] IS DEFECTIVE) 

    Result: 

    B 

    See step  17

  17. CHECK ANTENNA DIVIDER 
    1. Replace the antenna divider with a known good one.

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

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  18

  18. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Telematics > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  19

  19. CHECK FOR DTC 
    1. Recheck for DTCs and check that no DTCs are output.

      Body Electrical > Telematics > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    A 

    END (ANTENNA DIVIDER IS DEFECTIVE) 

    Result: 

    B 

    See step  20

  20. REPLACE DCM (TELEMATICS TRANSCEIVER) 
    1. Replace the DCM (Telematics Transceiver).

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

      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 [10/2022 - ] 

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