Airbag control unit with part number 77960-T70-H110-M4

What does the airbag control unit 77960-T70-H110-M4 do?

The airbag control unit 77960-T70-H110-M4 controls the restraint system (SRS) in the Honda. It continuously checks the crash sensors, decides within a fraction of a second in an accident whether airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light.

After an accident, the unit stores crash data and then remains locked.

The circuit works continuously in the background, so a problem may first show up in the instrument cluster.

Why does the control unit 77960-T70-H110-M4 fail?

The most common cause is crash data stored in memory after an accident, even if no airbag has deployed. A standard diagnostic tool cannot remove this entry.

Other causes include aged electronic components, cold solder joints, and moisture and corrosion on connectors. Voltage spikes, for example from a weak battery or when jump-started, can also stress the electronics.

Airbag24 removes the crash data during the repair, after which the other causes are checked.

How can you tell that the 77960-T70-H110-M4 is defective?

A defect shows as the airbag warning light in the instrument cluster, which stays on permanently or intermittently. A fault message in the instrument cluster and a fault memory that cannot be cleared are further signs.

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool cannot connect to the control unit
• Fault memory cannot be cleared

In the event of such a defect, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

Which vehicles is the 77960-T70-H110-M4 fitted in?

The 77960-T70-H110-M4 is fitted in these vehicles: Honda HR-V 2nd generation (2015-2022).

The following vehicle assignment is known to us for this part number:

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

Have the fault memory read out before removal, so it is clear whether the control unit itself is defective or a connector or cable. Also compare the part number on the label of the removed unit with the one stated above.

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-H110-M4 work?

Before removal, have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit, create a repair order online and send the unit in, packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the stored crash data and runs a function test. 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-H110-M4 get to Airbag24?

You send the control unit 77960-T70-H110-M4 as a parcel or book a UPS collection for an extra charge. The return journey is handled by UPS.

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