Airbag control unit with part number 77960-TA0-A202-M4

What does the airbag control unit 77960-TA0-A202-M4 do?

The airbag control unit 77960-TA0-A202-M4 is the central control unit of the restraint system for Honda. It measures through the crash sensors what happens in an accident and decides on the deployment of airbags and seatbelt pretensioners. It monitors the system continuously while doing so.

The unit detects faults in the system and reports them via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself. The lock is part of the concept of the system.

Why does the control unit 77960-TA0-A202-M4 fail?

Stored crash data after an accident is the most common cause of failure of the 77960-TA0-A202-M4, even without a triggered airbag. Aged components, cold solder joints, moisture and corrosion, and voltage spikes are also possible causes.

An ordinary diagnostic tool cannot erase the crash data. It makes no difference whether the airbag was actually triggered.

The other causes affect the electronics. Moisture and corrosion attack the plug connectors, and voltage spikes, for example from a weak battery or jump-starting, can affect the electronics.

How can you tell that the 77960-TA0-A202-M4 is defective?

A defect in the 77960-TA0-A202-M4 shows itself through the airbag warning light in the instrument cluster, which stays on permanently or intermittently. In addition, there is an error message in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be erased.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. This is precisely why the warning light is not a minor matter.

Have the system checked promptly rather than ignoring the warning light.

Which vehicles is the 77960-TA0-A202-M4 fitted in?

The 77960-TA0-A202-M4 is fitted in these vehicles: Honda Accord 8th generation (2008-2015).

The following overview lists the matching models.

• Honda Accord 8th generation (2008-2015)

Compare the part number on the unit with this page. This only shows that it is the right unit. Whether the control unit is defective or a connector or cable is behind it is clarified only by the fault memory, which you have read out.

For the same vehicles, we also repair control units with the part numbers 77960-S84-A86, 77960-TA0-A01, 77960-TA0-A011M4, 77960-TA0-A02, 77960-TA0-L02.

How does the repair of the 77960-TA0-A202-M4 work?

For the 77960-TA0-A202-M4, have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit. Next, create a repair order online and pack the unit well for dispatch.

Airbag24 examines the unit on the test bench, replaces defective components, erases crash data and carries out a function test. Your own unit is then returned to you.

Processing at Airbag24 usually takes 3–4 working days, and this time applies only to inspecting, repairing and testing. 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-TA0-A202-M4 get to Airbag24?

You send the control unit 77960-TA0-A202-M4 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Place the printed repair order in the parcel and pack the unit shockproof.