Airbag control unit with part number 77960-TA0-A031-M4

What does the airbag control unit 77960-TA0-A031-M4 do?

The airbag control unit 77960-TA0-A031-M4 coordinates the SRS restraint system for Honda. It reads the signals from the crash sensors, decides in a fraction of a second in an accident which airbags and seatbelt pretensioners to trigger, and constantly checks the system during operation. After an accident, it stores crash data and locks itself.

If the control unit detects a fault, it indicates this via the airbag warning light in the instrument cluster. This light is therefore the most important warning signal of the system, and you must not ignore it.

Without reliable feedback, it would remain unclear whether the system is ready in an emergency. That is why the warning light is revealing for every driver.

Why does the control unit 77960-TA0-A031-M4 fail?

With the 77960-TA0-A031-M4, the most common cause is a record of crash data from an accident that is stored in the unit, even if no airbag was triggered. Other triggers are aged components, moisture and corrosion at plug connections, and voltage spikes.

A normal diagnostic tool cannot erase the crash data. Erasure takes place at Airbag24 as part of the repair.

In addition, these causes come into consideration:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump starting

How can you tell that the 77960-TA0-A031-M4 is defective?

A defect on the 77960-TA0-A031-M4 shows as the airbag warning light in the instrument cluster lighting up permanently or intermittently. An error message in the instrument cluster, a missing contact of the diagnostic tool with the control unit or a fault memory that cannot be cleared also indicate a defect.

The light may burn permanently or only come on intermittently, but in both cases the system is faulty. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

A message does not disappear on its own, even if the light goes out in between. For this reason, it is worth having the fault memory read out before you take any further steps.

Which vehicles is the 77960-TA0-A031-M4 fitted in?

The 77960-TA0-A031-M4 is fitted in these vehicles: Honda Accord 8th generation (2008-2015).

The vehicles recorded for this part number are:

• Honda Accord 8th generation (2008-2015)

The check involves these steps. Compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. You should have the fault memory read out beforehand, because only this result 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-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-TA0-A031-M4 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit 77960-TA0-A031-M4. Next, create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. After that you receive your own unit back.

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-A031-M4 get to Airbag24?

You send the control unit 77960-TA0-A031-M4 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel, and pack the unit shockproof before it is shipped.