DTC B27A8: Open in Outside Luggage Compartment Electrical Key Antenna Circuit [10/2018 - ]: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
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 m (3.28 ft.) of the Luggage Compartment door. DTC B27A8 is stored by the certification ECU (smart key ECU assembly) when an open 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 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*). |
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DTC Output Confirmation Operation:
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- *: Only output while a malfunction is present and the power switch is on (IG).
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 luggage compartment door | - |
RELATED DATA LIST AND ACTIVE TEST
| DTC No. | Data List and Active Test |
|---|---|
| B27A8 | Key diagnostic mode can be used to perform troubleshooting |