Airbag control unit with part number 77960-T00-Y810-M2

What is the function of the Airbag Control Unit 77960-T00-Y810-M2?

The Airbag Control Unit 77960-T00-Y810-M2 is the central control module of the passive safety system in the 6th-generation Honda City (2008–2013). As an OEM part from Honda, it processes data from crash and acceleration sensors and decides within milliseconds whether to deploy airbags and seatbelt pretensioners.

This component is essential for occupant safety. It continuously monitors all connected sensors and actuators of the restraint system (SRS – Supplemental Restraint System). If a fault occurs, the airbag warning light illuminates to alert the driver.

Precise calibration to the vehicle body and installed safety technology ensures that the restraint systems activate only when required by the severity of the accident, preventing false deployments.

Why does the Airbag Control Unit 77960-T00-Y810-M2 fail?

The most common cause of failure is the storage of crash data after an accident, which permanently locks the control unit. Similarly, internal hardware faults—such as defects in electronic components on the circuit board—can lead to malfunctions, signaled by error codes like 91-1 (severe internal defect).

Following a collision, the control unit irrevocably writes a crash record into its internal memory. This lock cannot be removed using standard workshop diagnostic tools, requiring specialized electronic repair to restore full functionality.

Hardware defects are also a typical source of failure. Error codes such as 93F9 or 93D7 indicate issues with the internal electronics. Such defects can often be repaired by replacing specific components on the circuit board. A complete failure may also manifest as a loss of communication via the OBD2 interface.

Similar fault patterns are also observed in related part numbers, such as 77810-T9DT81ZA, which is likewise used in the 6th-generation Honda City.

How do you recognize a defect in the 77960-T00-Y810-M2 control unit?

The clearest symptom is the persistently illuminated airbag warning light (SRS light) in the instrument cluster. Additional signs include reading specific error codes indicating an internal control unit fault, as well as a complete inability to communicate with the diagnostic tool via the OBD2 port.

If the red SRS warning light does not turn off after starting the engine, the system signals a critical error. In this state, the vehicle no longer provides occupant protection through airbags or seatbelt pretensioners.

During workshop diagnostics, it is often found that no connection can be established with the airbag control unit. The device fails to respond to requests, making further fault analysis impossible and strongly suggesting an internal defect.

Stored error codes such as 91-1 (“severe internal defect”) or 93F9/93D7 (“control unit malfunction”) are clear indicators. They confirm that the root cause lies directly within the control unit itself, rather than in external components like sensors or wiring.

In which vehicles is the 77960-T00-Y810-M2 control unit installed?

This OEM airbag control unit is specifically designed for use in the 6th-generation Honda City. At Airbag24, repairs are offered for part number 77960-T00-Y810-M2, as well as for the related number 77810-T9DT81ZA, ensuring exact compatibility with this particular model.

The repair service at Airbag24 focuses on the following vehicle series:

Honda: City, 6th Generation (model years 2008–2013)

What are the advantages of repairing versus purchasing a new unit?

Repairing the original control unit offers substantial cost savings—up to 90% compared to a new unit, which often costs over €500. Additionally, the original vehicle-specific coding (VIN) is preserved, avoiding compatibility issues and providing a plug-and-play solution.

A key technical advantage is maintaining the original hardware. Since the internal VIN is stored in the control unit, post-repair there is no need for time-consuming reprogramming or recoding at the workshop. The repaired unit simply gets reinstalled and is immediately ready for use.

Specialized providers offer a warranty on the completed repair, 2 years, providing added assurance that the control unit will remain fully functional and reliable after restoration.

How does the repair process work at Airbag24?

The repair process at Airbag24 is designed for efficiency and safety. After submitting the removed control unit, a professional diagnosis is performed. Depending on the nature of the defect, stored crash data is reset or defective hardware components on the circuit board are replaced, followed by a final functional test.

Beforehand, a specialized workshop should confirm that the fault lies definitively in the control unit. After removal, the unit is securely packaged and sent to Airbag24 along with a detailed description of the error.

Upon receipt, our technicians perform a thorough analysis. Repairs include professionally resetting the memory to factory settings or replacing defective electronic components. Each repair is backed by 2 years' statutory liability for defects.

Following successful repair and a comprehensive functional test, the control unit is promptly returned to you and can be reinstalled in your vehicle.