Safety Warning
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DTC B27A2: Open in Front Passenger Side Electrical Antenna Circuit [08/2019 - ]: 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 No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| B27A2 | Open in Front Passenger Side Electrical Antenna Circuit | 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*). |
|
DTC Output Confirmation Operation:
|
- *: Only output while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Entry lock/unlock operation cannot be performed for front passenger door | - |
| DTC Code | Data List and Active Test |
|---|---|
| B27A2 | Key diagnostic mode can be used to perform troubleshooting |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.