Airbag control unit with part number 77960-T70-H310-M2

What does the airbag control unit 77960-T70-H310-M2 do?

The airbag control unit 77960-T70-H310-M2 controls the restraint system (SRS) of Honda. It evaluates the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are deployed, and monitors the system continuously.

The unit indicates faults via the airbag warning light. After an accident it stores crash data and locks itself.

Why does the control unit 77960-T70-H310-M2 fail?

Most often the cause lies in stored crash data, even if no airbag has deployed. Other causes are:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

Crash data cannot be erased with a standard diagnostic tool. The fault therefore remains even after the restraint system has been restarted.

Solder joints and plug connections cannot always be judged from the outside. Reading out the fault memory therefore shows where the cause lies.

How can you tell that the 77960-T70-H310-M2 is defective?

A defect shows up as the airbag warning light, as error messages in the instrument cluster, as a missing connection to the diagnostic tool or as a fault memory that cannot be cleared.

• The airbag warning light stays on permanently or intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool receives no connection to the control unit.
• The fault memory cannot be cleared.

In this condition, airbags and seatbelt pretensioners may not deploy in an emergency. Please have the finding clarified promptly.

Which vehicles is the 77960-T70-H310-M2 fitted in?

The control unit 77960-T70-H310-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The allocation in detail:

• Honda HR-V 2nd generation (2015-2022)

Compare the part number on the label with this page. This check only confirms that you have the correct unit. Also have the fault memory read out beforehand, because only the log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-3V0-A81, 77960-T7S-A21, 77960-T7S-A212-M2, 77960T7SK410M2.

How does the repair of the 77960-T70-H310-M2 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit 77960-T70-H310-M2 and create a repair order online. Afterwards, send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the crash data and carries out a function test. Checking, repairing and testing usually take 3–4 working days.

Your own unit is then returned to you. Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 77960-T70-H310-M2 get to Airbag24?

You send the control unit as a parcel or book a UPS collection for an extra charge. After the repair, your own unit comes back to you by UPS.

Enclose the printed repair order in the parcel and pack the unit so that it is shock-resistant.