DTC    B27A8    Open in Outside Luggage Compartment Electrical Key Antenna Circuit

for Preparation Click here


DESCRIPTION

The certification ECU generates a request signal and transmits the signal to the outside electrical key oscillator (outside luggage). The outside electrical key oscillator (outside luggage) detects that 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 back door, the signal is transmitted. DTC B27A8 is stored by the certification ECU when an open is detected in the terminals between the certification ECU and outside electrical key oscillator (outside luggage) (CLG8 - CLG5, CG8B - CLGB).

DTC Code
DTC Detection Condition
Trouble Area
B27A8
Open is detected in the terminals between the certification ECU and the outside electrical key oscillator (outside luggage) (CLG8 - CLG5, CG8B - CLGB).
  1. Wire harness or connector
  2. Outside electrical key oscillator (outside luggage)
  3. Certification ECU

WIRING DIAGRAM


B210706E01


INSPECTION PROCEDURE

NOTICE:
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

1.CHECK CONNECTOR CONNECTION CONDITION

  1. Turn the engine switch off.

  1. Check that the connectors are properly connected to the certification ECU and the outside electrical key oscillator (outside luggage).

    OK:
    Connectors are properly connected.



NG
CONNECT CONNECTORS PROPERLY
OK


2.CHECK HARNESS AND CONNECTOR (OUTSIDE ELECTRICAL KEY OSCILLATOR - CERTIFICATION ECU)
B200007E01

  1. Disconnect the certification ECU connector.

  1. Disconnect the outside electrical key oscillator (outside luggage) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G34-1 (CLG5) - D35-19 (CLG8)
    		Always
    		Below 1 Ω
    G34-2 (CLGB) - D35-20 (CG2B)
    		Always
    		Below 1 Ω
    D35-19 (CLG8) - Body ground
    		Always
    		10 kΩ or higher
    D34-20 (CG8B) - Body ground
    		Always
    		10 kΩ or higher

Text in Illustration 
*1
Front view of wire harness connector
(to Outside Electrical Key Oscillator (Outside Luggage))
*2
Front view of wire harness connector
(to Certification ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT OUTSIDE ELECTRICAL KEY OSCILLATOR (OUTSIDE LUGGAGE)
B216458E01

  1. Remove the outside electrical key oscillator (outside luggage) (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 (CLG5) - 2 (CLGB)
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Component without harness connected
    (Outside Electrical Key Oscillator (Outside Luggage))



NG
REPLACE OUTSIDE ELECTRICAL KEY OSCILLATOR (OUTSIDE LUGGAGE) (Click here)
OK


4.REPLACE CERTIFICATION ECU

  1. Temporarily replace the certification ECU with a new or normally functioning one.


NEXT


5.CHECK DTC OUTPUT

  1. Clear the DTCs (Click here).

  1. Recheck for DTCs (Click here).

    OK:
    B27A8 output does not recur.



NG
REPLACE OUTSIDE ELECTRICAL KEY OSCILLATOR (OUTSIDE LUGGAGE) (Click here)
OK

END (CERTIFICATION ECU IS DEFECTIVE)