Airbag control unit with part number 77960-T7A-J830-M2

What does the airbag control unit 77960-T7A-J830-M2 do?

The control unit 77960-T7A-J830-M2 coordinates the restraint system (SRS) in the Honda. It receives the measured values from the crash sensors and determines within milliseconds in an accident which airbags and seatbelt pretensioners are triggered. It also monitors the entire system and reports faults via the airbag warning light.

An accident causes the unit to store crash data and lock itself.

During normal driving the control unit is inconspicuous. Only an identified fault becomes visible in the instrument cluster.

The unit therefore works out of sight, yet checks every function continuously.

Why does the control unit 77960-T7A-J830-M2 fail?

The most common cause is crash data stored after an accident, even if no airbag was deployed. A normal diagnostic tool cannot remove this data. Further causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Stored crash data does not automatically mean that components are destroyed. It shows that the unit has classed an event as an accident, and that is enough to trigger the fault.

Electronics age over time, and solder joints can come loose. Moisture at the connections can also disturb the communication of the control unit.

A jump start or a weak battery brings voltage spikes that put a strain on sensitive components.

How can you tell that the 77960-T7A-J830-M2 is defective?

The airbag warning light in the instrument cluster lights up constantly or only intermittently, and an error message appears. In addition, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared.

These indications are clear signs that the system has detected a fault. As long as the fault persists, airbags and seatbelt pretensioners may fail to deploy in an emergency. A prompt check is therefore advisable.

Which vehicles is the 77960-T7A-J830-M2 fitted in?

The control unit 77960-T7A-J830-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The list of stored vehicles follows now:

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

Comparing the part number on the label of the removed unit with this page only confirms that you have the right unit in front of you. Have the fault memory read out in advance, 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-T7A-J830-M2 work?

Begin by having the fault memory read out and enclose the log with the unit. Then disconnect the battery, and only afterwards remove the control unit. Finally, create a repair order online and send the unit in well packed.

Airbag24 tests the unit on the test bench and repairs defective components. The crash data is then deleted and a function test is carried out. Processing at Airbag24 usually takes 3–4 working days.

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-T7A-J830-M2 get to Airbag24?

You send the control unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

You place the printed repair order in the parcel and pack the control unit shock-proof.