DTC B27A8: Open in Outside Luggage Compartment Electrical Key Antenna Circuit [08/2019 - ]: Procedure
- CHECK CONNECTOR CONNECTION
- 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
Result:
NG
CONNECT CONNECTORS PROPERLY
Result:
OK
See step 2
- Check that the connectors are properly connected to the certification ECU (smart key ECU assembly) and electrical key antenna (outside luggage compartment).
- CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))
- Disconnect the G112 certification ECU (smart key ECU assembly) connector.
- Disconnect the R47 electrical key antenna (outside luggage compartment) connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G112-2 (CLG8) - R47-2 (CLG) Always Below 1 Ω G112-1 (CG8B) - R47-1 (CLGB) Always Below 1 Ω - Reconnect the G112 certification ECU (smart key ECU assembly) connector.
Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT))
*a Component with harness connected
(Certification ECU (Smart Key ECU Assembly))*b Waveform 1 - Using an oscilloscope, check the waveform.
OK
Tester Connection Condition Tool Setting Specified Condition G112-2 (CLG8) - G113-11 (E) Procedure: - Engine switch off
- Electrical key transmitter sub-assembly brought outside vehicle
- All doors closed
- Luggage electrical key switch off → on
2 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 1)G112-1 (CG8B) - G113-11 (E) Procedure: - Engine switch off
- Electrical key transmitter sub-assembly brought outside vehicle
- All doors closed
- Luggage electrical key switch off → on
2 V/DIV., 500 ms/DIV. Pulse generation
(See waveform 1)- *: For details about the entry function detection area, refer to Operation Check.
Refer to OPERATION CHECK [08/2019 - 08/2022] , or refer to OPERATION CHECK [08/2022 - ]
Result
Proceed to OK NG
Result:
OK
REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE COMPARTMENT). Refer to REMOVAL [08/2019 - ]
Result:
NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [08/2019 - 08/2021] , or refer to REMOVAL [08/2021 - ]
- Using an oscilloscope, check the waveform.