DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit [01/2017 - ]: Procedure

1. Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and door outside handle sub-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

1. Disconnect the X23 certification ECU (smart key ECU assembly) connector.
2. Disconnect the V1 door outside handle sub-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
   X23-15 (CLG2) - V1-2 (ANT1)	Always	Below 1 Ω
   X23-14 (CG2B) - V1-1 (ANT2)	Always	Below 1 Ω

4. Reconnect the X23 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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Using an oscilloscope, check the waveform.

   OK

   Tester Connection	Condition	Tool Setting	Specified Condition
   X23-15 (CLG2) - P66-18 (E)	Procedure: Power switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle 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: Power switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle 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)
   X23-14 (CG2B) - P66-18 (E)	Procedure: Power switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle 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: Power switch off All doors closed Electrical key transmitter sub-assembly not inside vehicle 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 [01/2017 - 05/2023] , or refer to OPERATION CHECK [05/2023 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE DOOR OUTSIDE HANDLE SUB-ASSEMBLY (FOR FRONT PASSENGER DOOR). Refer to  DISASSEMBLY [01/2017 - 06/2019]  , or refer to  DISASSEMBLY [06/2019 - 04/2020]  , or refer to  DISASSEMBLY [04/2020 - 05/2023]  , or refer to  DISASSEMBLY [05/2023 - ] 

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [01/2017 - 05/2023]  , or refer to  REMOVAL [05/2023 - ]