Airbag control unit with part number 77960-T7S-P410-M2

What does the airbag control unit 77960-T7S-P410-M2 do?

The airbag control unit 77960-T7S-P410-M2 is the central control unit of the restraint system in Honda. It evaluates the crash sensors, determines in an accident which airbags and seatbelt pretensioners will trigger, and monitors the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. The light is therefore the direct sign that something in the system needs checking.

After an accident, it stores crash data and locks itself.

Why does the control unit 77960-T7S-P410-M2 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are further possible causes.

Crash data cannot be erased with a standard diagnostic tool. Airbag24 erases it during the repair.

The other causes concern the electronics and their connections. Components age, solder joints can go cold, and moisture or corrosion on plugs impairs the contact. Voltage spikes, for example from a weak battery or a jump start, can also stress the unit.

How can you tell that the 77960-T7S-P410-M2 is defective?

A defect in the 77960-T7S-P410-M2 becomes visible through a number of signs. The most important are an airbag warning light that stays on permanently or intermittently, and an error message in the instrument cluster.

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

While such a defect exists, airbags and seatbelt pretensioners may not deploy in an emergency. The light going out after a while does not necessarily mean the fault has been fixed.

Which vehicles is the 77960-T7S-P410-M2 fitted in?

The control unit 77960-T7S-P410-M2 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The list shows the vehicles in which this unit was installed.

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

First, compare the part number on the label of the removed unit with this page to make sure you have the right unit. Then have the fault memory read out, because only that 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-T7S-P410-M2 work?

First, have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit 77960-T7S-P410-M2. Next, create a repair order online and send the unit in, well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. The unit then comes back to you.

Processing at Airbag24 usually takes 3–4 working days. This time covers testing, repairing and checking only.

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-T7S-P410-M2 get to Airbag24?

You send the control unit 77960-T7S-P410-M2 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the control unit in a shock-proof way.