DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit: Description

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the front door outside handle assembly RH (front passenger side electrical key antenna) at intervals of 250 ms. For the front door outside handle assembly RH (front passenger side electrical key antenna) to detect when the electrical key transmitter is brought close to the vehicle, a signal requesting a response from the electrical key transmitter is transmitted within approximately 1 m (3.28 ft.) of the front passenger side door at intervals of 250 ms. DTC B27A2 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 front door outside handle assembly RH (front passenger side electrical key antenna) (between terminals CLG2 and ANT1, or terminals CG2B and ANT2).

DTC Code	DTC Detection Condition	Trouble Area	DTC Output Confirmation Operation
B27A2	An open circuit is detected in the circuit between the certification ECU (smart key ECU assembly) and front door outside handle assembly RH (CLG2 - ANT1, CG2B - ANT2) (1 trip detection logic*).	Harness or connector Front door outside handle assembly RH Certification ECU (smart key ECU assembly)	No confirmation operation is necessary (monitoring is continuous).

*: Only output while a malfunction is present.

VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED

Vehicle Condition when Malfunction Detected	Fail-safe Operation when Malfunction Detected
Entry lock/unlock operation cannot be performed for front passenger side door	-

RELATED DATA LIST AND ACTIVE TEST

DTC Code	Data List and Active Test
B27A2	Key diagnostic mode can be used to perform troubleshooting