DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit (07/2015 -): Description

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the front door outside handle assembly RH (for front passenger door) (electrical key antenna) at intervals of 0.25 seconds. For the front door outside handle assembly RH (for front passenger door) (electrical key antenna) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, a signal requesting a response from the electrical key transmitter sub-assembly is transmitted within approximately 1 m (3.28 ft.) of the front passenger door at intervals of 0.25 seconds. 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 (for front passenger door) (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 (for front passenger door) (CLG2 - ANT1, CG2B - ANT2) (This is detected by the malfunction detection circuit in the certification ECU (smart key ECU assembly) (1 trip detection logic*).	Wire harness or connector Front door outside handle assembly RH (for front passenger door) Certification ECU (smart key ECU assembly)	Any time

*: 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 door	-

RELATED DATA LIST AND ACTIVE TEST

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