DTC B27A3-13: Rear Door Electrical Antenna, Driver's Side Circuit Open [11/2021 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. 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 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 B27A3-13 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 |
| B27A3-13 |
Rear Door Electrical Antenna, Driver's Side Circuit Open |
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 |
| B27A3-13 |
Key diagnostic mode can be used to perform troubleshooting |