DTC B27A3: Open in Rear Door Electrical Antenna Circuit, Drivers Side [09/2015 - ]: Description

The certification ECU (smart key ECU assembly) generates a request signal and transmits the signal to the rear door outside handle assembly (for driver side) (electrical key antenna) at intervals of 0.25 seconds. For the rear door outside handle assembly (for driver side) (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 rear door at intervals of 0.25 seconds. DTC B27A3 is stored by the certification ECU (smart key ECU assembly) when an open is detected between the certification ECU (smart key ECU assembly) and rear door outside handle assembly (for driver side) (electrical key antenna) (between terminals CLG3 and ANT1, or terminals CG3B and ANT2).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
B27A3	Open in Rear Door Electrical Antenna Circuit, Drivers Side	An open is detected in the circuit between the certification ECU (smart key ECU assembly) and rear door outside handle assembly (for driver side) (CLG3 - ANT1, CG3B - ANT2) (This is detected by the malfunction detection circuit in the certification ECU (smart key ECU assembly)) (1 trip detection logic*).	Certification ECU (smart key ECU assembly) Rear door outside handle assembly (for driver side) Harness or connector	DTC Output Confirmation Operation: 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 rear door (for driver side)	-

RELATED DATA LIST AND ACTIVE TEST

DTC No.	Data List and Active Test
B27A3	Key diagnostic mode can be used to perform troubleshooting