Airbag control unit with part number 77960-TXM-J410-M4

What does the airbag control unit 77960-TXM-J410-M4 do?

The airbag control unit 77960-TXM-J410-M4 is the central control unit of the SRS for Honda. It processes the data from the crash sensors, selects in an accident within milliseconds the airbags and seatbelt pretensioners to trigger, and monitors the system. After an accident, it stores crash data and locks itself.

The control unit is responsible for the entire restraint system. It outputs any faults that occur via the airbag warning light in the instrument cluster.

Why does the control unit 77960-TXM-J410-M4 fail?

Crash data stored after an accident is the most common cause, even if no airbag was triggered; a normal diagnostic tool cannot delete it. Airbag24 deletes it during the repair. Other causes are ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data alone says nothing about the condition of the rest of the electronics. Whether a cause applies is shown only by the check on the test bench, not by the outward appearance of the unit.

How can you tell that the 77960-TXM-J410-M4 is defective?

The airbag warning light in the instrument cluster indicates the defect when it stays on permanently or intermittently. A fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared are added signs.

Intermittent lighting in particular is often overlooked, but it is a sign. While the fault persists, airbags and seatbelt pretensioners may not trigger in an emergency.

Which vehicles is the 77960-TXM-J410-M4 fitted in?

The 77960-TXM-J410-M4 is fitted in these vehicles: Honda Insight 3rd generation (2018-2022).

The list of vehicles follows.

• Honda Insight 3rd generation (2018-2022)

Comparing the part number on the label with this page confirms that it is the correct unit, nothing more. Have the fault memory read out beforehand; only the 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-TXM-A23, 77960TXMA230M2.

How does the repair of the 77960-TXM-J410-M4 work?

First have the fault memory read out and enclose the log, then disconnect the battery; only after that do you remove the control unit. Then create a repair order online and send in the well-packed unit. The processing at Airbag24 usually takes 3–4 working days; during this time the unit is checked, defective components are repaired, crash data is deleted and a function test is carried out.

Processing covers only the checking, repairing and testing in-house. The order of the steps is for safety.

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-TXM-J410-M4 get to Airbag24?

The unit goes to Airbag24 either as a parcel, or you book a UPS collection for an extra charge; after the repair it returns by UPS. The printed repair order belongs in the parcel, and the unit must be packed shock-resistant.

A sturdy box with padding material prevents damage from impacts during transport.