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 (3.3 ft.) of the passenger door, the signal is transmitted at the frequency stated above. DTC B27A2 is stored by the certification ECU when an open circuit is detected in the circuit 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 circuit is detected in the circuit 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

A0056IIE19

CAUTION / NOTICE / HINT

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 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 - CERTIFICATIONECU)


    1. A0054DCE02
      Text in Illustration
      *1 for LHD
      *2 for RHD
      *3

      Front view of wire harness connector

      (to Front Door Outside Handle Assembly (for Passenger Side))
      *4

      Front view of wire harness connector

      (to Certification ECU)

      Disconnect the D54 ECU connector.

    2. Disconnect the E7*1 or E17*2 handle connector.

      *1: for LHD

      *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      E7-3 (ANT2) - D54-6 (CG2B) Always Below 1 Ω
      E7-6 (ANT1) - D54-5 (CLG2) Always Below 1 Ω
      E7-2 (GND) - Body ground Always Below 1 Ω
      D54-6 (CG2B) - Body ground Always 10 kΩ or higher
      D54-5 (CLG2) - Body ground Always 10 kΩ or higher
      D54-15 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      E17-3 (ANT2) - D54-6 (CG2B) Always Below 1 Ω
      E17-6 (ANT1) - D54-5 (CLG2) Always Below 1 Ω
      E17-2 (GND) - Body ground Always Below 1 Ω
      D54-6 (CG2B) - Body ground Always 10 kΩ or higher
      D54-5 (CLG2) - Body ground Always 10 kΩ or higher
      D54-15 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT CERTIFICATION ECU


    1. A0052O6E02
      Text in Illustration
      *1

      Component with harness connected

      (Certification ECU)

      Reconnect the D54 ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D54-5 (CLG2) - D54-15 (E) Engine switch off, all doors closed, and key not in cabin No pulse generation
      D54-5 (CLG2) - D54-15 (E) Engine switch off, all doors closed, all doors locked with wireless door lock control and key not in cabin Pulse generation
      D54-6 (CG2B) - D54-15 (E) Engine switch off, all doors closed, and key not in cabin No pulse generation
      D54-6 (CG2B) - D54-15 (E) Engine switch off, all doors closed, all doors locked with wireless door lock control and key not in 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 FOR DTC


    1. Clear the DTCs Click here.

    2. Recheck for DTCs Click here.

      OK
      B27A2 output does not recur.

    OK

    END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU