THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Entry Function)  B27A8  Open in Outside Luggage Compartment Electrical Key Antenna Circuit  


DESCRIPTION

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the electrical key antenna (outside luggage compartment). For the electrical key antenna (outside luggage compartment) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, the received request signal is transmitted within approximately 1.0 m (3.28 ft.) of the luggage compartment door. DTC B27A8 is stored by the certification ECU (smart key ECU assembly) when an open circuit is detected between the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment) (between terminals CLG8 and ANTE8, or terminals CG8B and CLGB).

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B27A8 Open in Outside Luggage Compartment Electrical Key Antenna Circuit An open circuit is detected in the circuit between the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment) (CLG8 - ANTE8, CG8B - CLGB) (1 trip detection logic*).
·

Wire harness or connector

·

Electrical key antenna (outside luggage compartment)

·

Certification ECU (smart key ECU assembly)


DTC Output Confirmation Operation

Any time



Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
Entry unlock operation cannot be performed for luggage compartment door -

*: Only output while a malfunction is present.


Related Data List and Active Test Item
DTC Code Data List and Active Test Item
B27A8 Key diagnostic mode can be used to perform troubleshooting

WIRING DIAGRAM

B483364E04
5.531,0.448 6.448,0.646 0.917,0.198 10 false CLG8 1.323,0.448 2.24,0.646 0.917,0.198 10 false ANTE8 1.396,0.906 2.313,1.104 0.917,0.198 10 false CLGB 5.51,0.896 6.427,1.094 0.917,0.198 10 false CG8B 5.5,1.385 6.417,1.583 0.917,0.198 10 false E 5.083,1.823 6.896,2.344 1.813,0.521 10 false Certification ECU (Samrt Key ECU Assembly) 0.135,1.417 1.052,1.615 0.917,0.198 10 false L66 0.135,1.583 2.677,2.135 2.542,0.552 10 false Electrical Key Antenna (Outside Luggage Compartment) 1.885,0.323 2.281,0.542 0.396,0.219 10 false 1 1.875,0.792 2.271,1.01 0.396,0.219 10 false 2 5.229,0.25 5.625,0.469 0.396,0.219 10 false 2 5.146,0.438 5.563,0.656 0.417,0.219 10 false E109 5.24,0.708 5.635,0.927 0.396,0.219 10 false 1 5.177,1.167 5.573,1.385 0.396,0.219 10 false 11 5.135,0.906 5.552,1.125 0.417,0.219 10 false E109 5.146,1.354 5.563,1.573 0.417,0.219 10 false E108

CAUTION / NOTICE / HINT

NOTICE:
·

The smart entry and start system (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Entry Function)>HOW TO PROCEED WITH TROUBLESHOOTING

·

When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

Before replacing the certification ECU (smart key ECU assembly), refer to smart entry and start system (for Entry Function) Precaution.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM(for Entry Function)>PRECAUTION

·

After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

·

The electrical key antenna (outside luggage compartment) has an antenna coil between terminals ANTE8 and CLGB.



PROCEDURE

1.CHECK CONNECTOR CONNECTION
a.

Turn the engine switch off.


b.

Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment).

OK:

Connectors are properly connected.



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))

NG

CONNECT CONNECTORS PROPERLY

2.CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))
a.

Disconnect the E109 certification ECU (smart key ECU assembly) connector.


b.

Disconnect the L66 electrical key antenna (outside luggage compartment) connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E109-2 (CLG8) - L66-1 (ANTE8) Always Below 1 Ω
E109-1 (CG8B) - L66-2 (CLGB) Always Below 1 Ω
E108-11 (E) - Body ground Always Below 1 Ω
E109-2 (CLG8) or L66-1 (ANTE8) - Body ground Always 10 kΩ or higher
E109-1 (CG8B) or L66-2 (CLGB) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.INSPECT ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.INSPECT ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT)
a.
B226391C14
1.823,1.073 2.219,0.708 2.219,0.708 2.406,0.708 false 1.594,1.083 1.198,0.719 1.198,0.719 1.021,0.719 false 2.469,0.615 3.01,0.813 0.542,0.198 10 CLGB 0.417,0.635 0.99,0.823 0.573,0.188 10 ANTE8 0.156,0.167 0.427,0.375 0.271,0.208 10 *a
*a Component without harness connected
(Electrical Key Antenna (Outside Luggage Compartment))


Remove the electrical key antenna (outside luggage compartment).

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ELECTRICAL KEY OSCILLATOR(for Outside Luggage Compartment)>REMOVAL


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (ANTE8) - 2 (CLGB) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

4.REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ELECTRICAL KEY OSCILLATOR(for Outside Luggage Compartment)>REMOVAL


4.REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
a.

Temporarily replace the certification ECU (smart key ECU assembly) with a new one.

HINT:

Refer to Service Bulletin.



Result:
Proceed to
NEXT



NEXT

5.CLEAR DTC
5.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Entry&Start > Clear DTCs
50002 125

Result:
Proceed to
NEXT



NEXT

6.CHECK FOR DTC
6.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Entry&Start > Trouble Codes
50001 125
OK:

DTC B27A8 is not output.



Result:
Proceed to
OK
NG



OK

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

NG

REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ELECTRICAL KEY OSCILLATOR(for Outside Luggage Compartment)>REMOVAL