ENTRY AND START SYSTEM (for Entry Function), Diagnostic DTC:B27A2

DTC Code DTC Name
B27A2 Open in Front Passenger Side Electrical Antenna Circuit

DESCRIPTION

The certification ECU generates a request signal and transmits the signal to the front door outside handle assembly (for passenger side) at an interval of 250 ms. The front door outside handle assembly (for passenger side) detects when the electrical key is brought close to the vehicle, and when a request signal is received from within 1.0 m (3.28 ft.) of the driver door, the signal is transmitted at the frequency stated above. DTC B27A2 is stored by the certification ECU when an open is detected in the terminals between the certification ECU and the front door outside handle assembly (for passenger side) (CLG2 - ANT1, CG2B - ANT2).

DTC Code DTC Detection Condition Trouble Area
B27A2 Open is detected in the terminals between the certification ECU and the front door outside handle assembly (for passenger side) (CLG2 - ANT1, CG2B - ANT2).

  • Wire harness or connector

  • Front door outside handle assembly (for passenger side)

  • Certification ECU

WIRING DIAGRAM

A011A9YE02

INSPECTION PROCEDURE

Note

When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the DLC3, and turn a courtesy light switch on and off at 1.5-second intervals until communication between the tester and vehicle begins

PROCEDURE


  1. CHECK CONNECTOR CONNECTION CONDITION


    1. Turn the engine switch off.

    2. Check that the connectors are properly connected to the certification ECU and the front door outside handle assembly (for passenger side).

      OK
      Connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  2. CHECK HARNESS AND CONNECTOR (FRONT DOOR OUTSIDE HANDLE ASSEMBLY - CERTIFICATION ECU)


    1. A0119TVE05
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Front Door Outside Handle assembly)
      *2

      Front view of wire harness connector

      (to Certification ECU)
      *3 for LHD
      *4 for RHD

      Disconnect the certification ECU connector.

    2. Disconnect the front door outside handle assembly (for passenger side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q1-3 (ANT2) - D34-6 (CG2B)*1 Always Below 1 Ω
      R1-3 (ANT2) - D34-6 (CG2B)*2 Always Below 1 Ω
      Q1-6 (ANT1) - D34-5 (CLG2)*1 Always Below 1 Ω
      Q1-6 (ANT1) - D34-5 (CLG2)*2 Always Below 1 Ω
      Q1-2 (GND) - Body ground*1 Always Below 1 Ω
      R1-2 (GND) - Body ground*2 Always Below 1 Ω
      D34-6 (CG2B) - Body ground Always 10 kΩ or higher
      D34-5 (CLG2) - Body ground Always 10 kΩ or higher

      • *1: for LHD

      • *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT CERTIFICATION ECU


    1. A011AWAE02
      Text in Illustration
      *1

      Component with harness connected

      (Certification ECU)

      Reconnect the certification ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D34-15 (E) - Body ground Always Below 1 Ω

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

      OK
      Tester Connection Condition Specified Condition
      D34-5 (CLG2) - D34-15 (E) Engine switch off, all doors closed, and key not in the cabin No pulse generation
      D34-5 (CLG2) - D34-15 (E) Engine switch off, all doors closed, all door locked with wireless door lock control, and key not in the cabin Pulse generation
      D34-6 (CG2B) - D34-15 (E) Engine switch off, all doors closed, and key not in the cabin No pulse generation
      D34-6 (CG2B) - D34-15 (E) Engine switch off, all doors closed, all door locked with wireless door lock control, and key not in the cabin Pulse generation

    NG

    REPLACE CERTIFICATION ECU

    OK

  4. REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR PASSENGER SIDE)


    1. Temporarily replace the front door outside handle assembly (for passenger side) with a new or normally functioning one Click here.


    NEXT

  5. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Recheck for DTCs Click here.

      OK
      B27A2 output does not recur.

    NG

    REPLACE CERTIFICATION ECU

    OK

    END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY IS DEFECTIVE)