DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit: Procedure

1. Turn the power switch off.
2. Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and front door outside handle assembly (front passenger door).

   OK

   Connectors are properly connected.

NG → CONNECT CONNECTORS PROPERLY 

OK: Go to next step 

1. Disconnect the L62 certification ECU (smart key ECU assembly) connector.
2. Disconnect the m1 front door outside handle assembly (front passenger door) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L62-5 (CLG2) - m1-6 (ANT1)	Always	Below 1 Ω
   L62-6 (CG2B) - m1-3 (ANT2)	Always	Below 1 Ω
   L62-15 (E) - Body ground	Always	Below 1 Ω
   m1-2 (GND) - Body ground	Always	Below 1 Ω
   L62-5 (CLG2) or m1-6 (ANT1) - Body ground	Always	10 kΩ or higher
   L62-6 (CG2B) or m1-3 (ANT2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the L62 certification ECU (smart key ECU assembly) connector.
   Fig 1: Checking Certification ECU (Smart Key ECU Assembly) With Waveform Reference

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Waveform 1	*2	Waveform 2
   *a	Component with harness connected (Certification ECU (smart key ECU assembly))	-	-

2. Connect the m1 front door outside handle assembly (front passenger door) connector.
3. Using an oscilloscope, check the waveform.

   OK

   Tester Connection	Condition	Tool Setting	Specified Condition
   L62-5 (CLG2) - L62-15 (E)	Procedure: Power switch off Key brought outside vehicle All doors closed Key not inside vehicle Key brought inside detection area*1 All doors locked through wireless operation	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 1 Figure)
   L62-5 (CLG2) - L62-15 (E)	Procedure: Power switch off Key brought outside vehicle All doors closed Key not inside vehicle Key brought outside detection area*2 All doors locked through wireless operation	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 2 Figure)
   L62-6 (CG2B) - L62-15 (E)	Procedure: Power switch off Key brought outside vehicle All doors closed Key not inside vehicle Key brought outside detection area*2 All doors locked with key	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 2 Figure)

   • *1: For details about the areas that are inside the entry function detection area, refer to Operation Check. Refer to OPERATION CHECK .
   • *2: For details about the areas that are outside the entry function detection area, refer to Operation Check. Refer to OPERATION CHECK .

NG → See step   7 

OK: Go to next step 

1. Temporarily replace the front door outside handle assembly (front passenger door) with a new or normally functioning one. Refer to DISASSEMBLY .

NEXT: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Check for DTCs. Refer to DTC CHECK / CLEAR .

   OK

   DTC B27A2 is not output.

NG → See step   7 

OK → END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY RH WAS DEFECTIVE)