Airbag control unit with part number 77960-TL4-Y630-M4

What does the airbag control unit 77960-TL4-Y630-M4 do?

As the central control unit of the SRS restraint system in Honda, the airbag control unit 77960-TL4-Y630-M4 processes the signals from the crash sensors. In the event of an impact, it decides within milliseconds which airbags and seatbelt pretensioners to deploy, and it constantly checks the system for faults, which it indicates via the airbag warning light.

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

Why does the control unit 77960-TL4-Y630-M4 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot delete it. Other triggers are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start.

The other causes tend to develop over time: components age, solder joints can crack, moisture attacks contacts, and voltage spikes stress the electronics.

How can you tell that the 77960-TL4-Y630-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears on the display. The diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared.

The light is the most direct indication the vehicle gives. As long as it is lit or flashing, the airbags and seatbelt pretensioners may not deploy in an emergency. A defect does not go away on its own, so have the system checked.

Which vehicles is the 77960-TL4-Y630-M4 fitted in?

The airbag control unit 77960-TL4-Y630-M4 is fitted in these vehicles: Honda Accord 8th generation (2008-2015).

Specifically, these vehicles are involved:

• Honda Accord 8th generation (2008-2015)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. Also have the fault memory read out before removal, because only this result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-TA0-A01, 77960-TA0-A011M4, 77960-TA0-A02, 77960-TA0-A020-M4, 77960-TA0-A040-M4, 77960-TA0-A202-M4.

How does the repair of the 77960-TL4-Y630-M4 work?

First have the fault memory read out, attach the log and disconnect the battery. Only then remove the control unit and create a repair order online.

Airbag24 inspects the unit on the test bench and replaces defective components. Stored crash data is deleted, then a function test follows, and the unit, now repaired, is returned to you. Processing at Airbag24 usually takes 3–4 working days.

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-TL4-Y630-M4 get to Airbag24?

Either you send the unit in as a parcel, or you book a UPS collection for an extra charge. Airbag24 also returns it to you by UPS after the repair.

Include the printed repair order and pack everything shock-resistant.