Airbag control unit with part number 77960-T0A-P910-M4

What does the airbag control unit 77960-T0A-P910-M4 do?

The airbag control unit 77960-T0A-P910-M4 forms the central switching unit of the restraint system (SRS) at Honda. It processes the readings from the crash sensors, decides in an accident within fractions of a second whether airbags and seatbelt pretensioners trigger, and checks the system continuously.

If the unit detects a fault, it reports this via the airbag warning light in the instrument cluster. The fault information is stored and can be read out with a diagnostic tool or at a workshop.

After an accident the control unit stores crash data and locks itself.

Why does the control unit 77960-T0A-P910-M4 fail?

The most common cause for the 77960-T0A-P910-M4 is crash data stored after an accident, even if no airbag has triggered. In addition there are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

The data stays stored in the unit until it is specifically removed. A normal diagnostic tool cannot erase it. Airbag24 removes it during the repair.

The other causes are in the electrics. Aging electronics, moisture at the plugs and voltage spikes, for example from a weak battery or a jump-start, can likewise disturb a control unit.

How can you tell that the 77960-T0A-P910-M4 is defective?

A defect on the 77960-T0A-P910-M4 shows itself through the airbag warning light in the instrument cluster, which stays on permanently or intermittently. Fault messages accompany it, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

The airbag warning light in the instrument cluster stays on in the event of a defect, either permanently or only intermittently. Do not ignore this signal, because airbags and seatbelt pretensioners may then fail to trigger in an emergency.

The warning is therefore not a coincidence. It tells you that the system has registered a fault.

Which vehicles is the 77960-T0A-P910-M4 fitted in?

The control unit 77960-T0A-P910-M4 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018). Ultimately, the part number printed on the unit itself is what counts.

The following vehicles are assigned to this control unit:

• Honda CR-V 4 RM (2012-2018)

First check whether the part number on the label of the removed unit matches this page. That only confirms the right unit. Whether the control unit really is defective, or whether a plug or cable is causing the fault, is shown only by reading out the fault memory, which you should arrange beforehand.

For the same vehicles, we also repair control units with the part numbers 5WK43782, 77960-SWA-G212-M4, 77960-SWA-G214-M4, 77960-T1G-G920-M4.

How does the repair of the 77960-T0A-P910-M4 work?

Have the fault memory read out and attach the protocol to the unit before you disconnect the battery and remove the control unit. Then create a repair order online and pack the unit well. Airbag24 needs 3–4 working days in general for checking, repairing and testing.

On the test bench, Airbag24 checks the unit, repairs defective components, erases stored crash data and runs a function test. Afterwards your own unit comes back 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-T0A-P910-M4 get to Airbag24?

You send the unit to Airbag24 in a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns your own unit by UPS.

Enclose the printed repair order with the parcel, and pack the control unit shock-proof.