BYD ATTO 3 (e-Platform 3.0) B22A613 Right Front Exterior Detection Antenna Open Circuit

B22A613 indicates an open circuit has been detected in the right front exterior detection antenna circuit. The fault affects the smart key and keyless entry system, where exterior antennas detect the presence of an authorised key near the vehicle and provide location information to the relevant control system. The BYD ATTO 3 uses BYD’s e-Platform 3.0 architecture, with this generation introduced from 2022 and continuing onward.

Symptoms

• Smart keyless entry may not operate correctly
• Right front door handle may fail to detect the smart key
• Vehicle may not unlock when the key is nearby
• Remote or passive entry functions may operate intermittently
• Key detection may be slower than normal
• Smart key warning may be displayed
• B22A613 stored in the keyless entry control system
• Other exterior antenna or key detection faults may be present

Possible Causes

• Open circuit in the right front exterior detection antenna wiring
• Faulty right front exterior detection antenna
• Loose or disconnected antenna connector
• Damaged connector terminals
• Corrosion or poor electrical contact
• Damaged wiring near the front door or body
• Incorrectly installed or damaged antenna
• Low or unstable 12V system voltage
• Keyless entry control-module fault
• Communication fault affecting antenna operation

Diagnosis

Diagnosis should begin by confirming B22A613 and checking whether the smart key is detected correctly at other exterior locations. The right front antenna circuit, connector condition, wiring continuity, power and communication circuits, and antenna status should then be evaluated against manufacturer specifications.

Comparing the affected antenna with other exterior detection antennas can help determine whether the fault is isolated to the antenna assembly or its wiring. For New Zealand owners, confirming the antenna circuit before replacing the complete keyless entry system can help avoid unnecessary repair costs.

Accurately diagnosing this fault often requires manufacturer testing procedures, wiring diagrams, connector pinouts, specifications, and system calibration information. Access to the factory service manual significantly reduces diagnostic time and helps prevent unnecessary parts replacement.

Applicable Years

2022, 2023, 2024, 2025, 2026, onwards

To order the correct OEM Service and Repair Manual for your BYD ATTO 3, submit your request using the form below and our team will provide the ordering details.