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DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit [12/2019 - 11/2023]: Procedure

  1. CHECK CONNECTOR CONNECTION 
    1. Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and front door outside handle assembly (for front passenger door).

      OK

      Connectors are properly connected.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CONNECT CONNECTORS PROPERLY 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR FRONT PASSENGER DOOR)) 
    1. Disconnect the M5 certification ECU (smart key ECU assembly) connector.
    2. Disconnect the J9 front door outside handle assembly (for front passenger door) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M5-15 (CLG2) - J9-6 (ANT1) Always Below 1 Ω
      M5-14 (CG2B) - J9-4 (ANT2) Always Below 1 Ω
    4. Reconnect the M5 certification ECU (smart key ECU assembly) connector.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR FRONT PASSENGER DOOR)) 
    GTY851006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *A for Gasoline Model - -
    *a Component with harness connected
    (Certification ECU (Smart Key ECU Assembly))    		 *b Waveform 1
    *c Waveform 2 *d Waveform 3
    *e Waveform 4 - -
    1. Using an oscilloscope, check the waveform.

      OK

      Tester Connection Condition Tool Setting Specified Condition
      M5-15 (CLG2) - H48-18 (E) Procedure:
      1. Ignition switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*)
      		 5 V/DIV., 500 ms/DIV. Pulse generation
      (See waveform 1)
      Procedure:
      1. Ignition switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*)
      		 5 V/DIV., 100 ms/DIV. Pulse generation
      (See waveform 2)
      M5-14 (CG2B) - H48-18 (E) Procedure:
      1. Ignition switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*)
      		 5 V/DIV., 500 ms/DIV. Pulse generation
      (See waveform 3)
      Procedure:
      1. Ignition switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*)
      		 5 V/DIV., 100 ms/DIV. Pulse generation
      (See waveform 4)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [12/2019 - 11/2023]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR FRONT PASSENGER DOOR) 

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

    Result: 

    NG 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

    Refer to REMOVAL [12/2019 - 11/2023]

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