Airbag control unit with part number 77960-T1E-R910-M4

What does the airbag control unit 77960-T1E-R910-M4 do?

The airbag control unit 77960-T1E-R910-M4 handles the evaluation in the restraint system (SRS) of Honda. It processes the signals from the crash sensors, decides in an accident within fractions of a second on triggering airbags and seatbelt pretensioners, and checks the system constantly. After an accident it stores crash data and locks itself.

The control unit registers faults and records them in the fault memory. At the same time it reports faults via the airbag warning light in the instrument cluster.

Protection in an emergency therefore depends on this unit working without faults.

Why does the control unit 77960-T1E-R910-M4 fail?

With the 77960-T1E-R910-M4 the most common cause is crash data stored after an accident, even if no airbag has deployed. Aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible.

Crash data remains in the unit, because a normal diagnostic tool cannot remove any of it. That explains why a fault can persist even when no airbags have deployed.

The other causes affect the electronics and their connections. Cold solder joints can interrupt contacts, moisture promotes corrosion, and voltage spikes arise, for example, from a weak battery or when a jump start is connected.

How can you tell that the 77960-T1E-R910-M4 is defective?

The airbag warning light in the instrument cluster is the clearest sign: it lights up permanently or intermittently when the 77960-T1E-R910-M4 may be defective. Fault messages, a missing connection of the diagnostic tool and a fault memory that cannot be cleared are added.

In an emergency airbags and seatbelt pretensioners may not deploy. Therefore have the warning promptly clarified.

A fault message that disappears after the engine starts is also a reason for a check.

Which vehicles is the 77960-T1E-R910-M4 fitted in?

The control unit 77960-T1E-R910-M4 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018). The list shows the vehicles with this part number.

The matching vehicle is in this list:

• Honda CR-V 4 RM (2012-2018)

Compare the part number on the label with this page. That confirms nothing more than the correct unit assignment. The fault memory must be read out beforehand, because only this result shows whether the control unit itself 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-T0A-3070-M4, 77960-T0A-A012-M1, 77960-T0A-A013-M1, 77960-T0A-A210-M1, 77960-T0A-A212-M1, 77960-T0A-A230-M1.

How does the repair of the 77960-T1E-R910-M4 work?

For the 77960-T1E-R910-M4, first read out the fault memory and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Next create a repair order online and send the well-packed unit. At Airbag24 this usually takes 3–4 working days.

After that the work at Airbag24 begins: the unit goes onto the test bench, defective components are replaced, the crash data is deleted and a functional test is carried out. Then your own unit is 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-T1E-R910-M4 get to Airbag24?

Either you send the 77960-T1E-R910-M4 as a parcel, or you book a UPS collection for an extra charge. After the repair the unit comes back to you by UPS.

The printed repair order belongs in the parcel. Pack the control unit shock-resistant before you hand it over.