Airbag control unit with part number 77960-TEA-H830-M4

What does the airbag control unit 77960-TEA-H830-M4 do?

The airbag control unit 77960-TEA-H830-M4 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors and decides in an accident which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

The unit monitors the entire restraint system continuously. It checks the sensors, the firing circuits and the connections to the airbags and seatbelt pretensioners.

It stores detected faults in the fault memory and shows them via the airbag warning light in the instrument cluster. Only the repair lifts the lock after an accident.

Why does the control unit 77960-TEA-H830-M4 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage peaks.

The fact that crash data can be erased means for you: Airbag24 removes it during the repair. Until then it remains stored in the unit.

Aged components gradually lose reliability, and solder joints can give way. Moisture and corrosion disturb the contacts, and voltage peaks arise, for example, with a weak battery or when a jump start is connected.

Only the inspection shows which of these causes is actually present.

How can you tell that the 77960-TEA-H830-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

Typical signs are:

• airbag warning light permanently or intermittently on
• error message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. Please have the finding checked promptly.

Which vehicles is the 77960-TEA-H830-M4 fitted in?

The control unit 77960-TEA-H830-M4 is fitted in these vehicles: Honda Civic 10th generation (2015-2022).

For this part number the following models are known to us:

• Honda Civic 10th generation (2015-2022)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out before removal, because only this 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-SMG-G014-M1, 77960-TBA-A01, 77960-TBA-A02, 77960-TBA-A03, 77960-TBA-A04, 77960-TBA-A05.

How does the repair of the 77960-TEA-H830-M4 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit 77960-TEA-H830-M4. Online, you then create a repair order and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

The sequence is fixed for safety reasons. The battery is disconnected before removal, which comes last.

At Airbag24 the unit is examined on the test bench, defective components are renewed, the crash data is erased and a function test is carried out. Afterwards 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-TEA-H830-M4 get to Airbag24?

You send the control unit as a parcel or book a UPS collection for an extra charge. After the repair your own unit comes back to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof, so that it survives shipping undamaged.