What is a Honda Legend KA airbag control unit?
The airbag control unit for the Honda Legend KA is the central control unit for occupant safety. It continuously monitors all crash sensors, stores relevant accident information, and activates the appropriate airbags and seatbelt pretensioners as needed to ensure the safety of the vehicle's occupants.
This essential module coordinates the vehicle's entire passive safety system. After an accident, it stores detailed crash data, preventing the airbags from deploying again without prior repair or data deletion.
The vehicle-specific software of the control unit is retained after a professional repair to ensure seamless reintegration and full functionality in the Honda Legend KA.
Why is the Honda Legend KA airbag control unit defective?
A defect in the Honda Legend KA airbag control unit often occurs after an accident because it permanently stores crash data and is thus locked, preventing other safety systems from being triggered. Internal electronic errors or age-related wear can also lead to malfunctions and the activation of the SRS warning light.
After a collision, the control unit stores indelible crash information that prevents the airbags from reactivating until the module has been professionally reset. This is a safety measure to prevent uncontrolled deployment.
In addition, internal errors in the power supply, short circuits or faulty communication with other systems can cause a malfunction that requires targeted diagnosis and repair of the Honda Legend KA airbag control unit repair.
Common error codes for Honda Legend KA airbag control unit repair
During Honda Legend KA airbag control unit repair, specific error codes directly indicate problems with the control unit itself, such as internal failures, power supply errors, or short circuits in the display circuit. These codes require professional diagnosis and repair to restore system integrity.
- 9-1: SRS ECU Error / Failure → Indicates a general functional error or failure of the control unit.
- 9-2: Internal power supply error → Indicates a fault in the internal power supply of the airbag control unit.
- 87-31: Internal control unit error → Indicates a specific internal error in the airbag control electronics.
- 91-1x: Control Unit Internal Error → Another code for internal malfunctions within the SRS-ECU.
- 91-2x: Short circuit in the airbag indicator circuit → Indicates a short circuit in the area of the airbag warning lamp or the associated wiring.
What part numbers are available for the Honda Legend KA airbag control unit repair?
For Honda Legend KA airbag control unit repairs, the original OEM part numbers from Honda and Autoliv are primarily relevant, ensuring precise model matching. These numbers guarantee the compatibility of the repaired or replaced control unit with the vehicle.
The most common Honda OEM part number is 37820-P5A-G03. This number has been confirmed for the airbag control module of the Honda Legend III (KA) and is a typical Honda OEM format.
Additionally, there is the OEM number CYEH7821A from Autoliv, a leading supplier of safety systems. Autoliv supplies components to Honda as an original equipment manufacturer, which means this part number is also recognized as a genuine part and is relevant for Honda Legend KA airbag control unit repairs.
Compatibility and installation position for the Honda Legend KA airbag control unit repair
The airbag control unit is specifically designed for the third-generation Honda Legend KA (KA9), built approximately from 1995 to 2004, and is typically located in the interior under the passenger seat or in the center tunnel. A thorough check of the chassis and part number is essential for compatibility before repairing the Honda Legend KA airbag control unit.
Its precise location in the vehicle ensures short and safe cable routes to the various sensors and airbag modules. Due to its safety-critical function, installation and removal may only be carried out by qualified specialist workshops.
Before removing the airbag, the vehicle battery must be disconnected to prevent accidental deployment of the airbags. The control unit is connected to the vehicle electrical system via special multi-pin connectors.
Professional service for Honda Legend KA airbag control unit repair
A professional Honda Legend KA airbag control unit repair service includes comprehensive diagnostics, erasing stored crash data and error codes, and restoring full functionality. The control unit's vehicle-specific software remains fully intact, eliminating the need for reconfiguration.
This specialized repair service ensures that all safety-relevant functions of the airbag system function correctly again after an accident or an internal defect. Such a repair is typically completed within 3-5 business days.
The repair is often a more cost-effective and environmentally friendly alternative to replacing the entire control unit, while fully restoring the safety and original functionality of the Honda Legend KA.