Airbag control unit with part number 77960-TR0-T020-M1

What does the airbag control unit 77960-TR0-T020-M1 do?

The 77960-TR0-T020-M1 is the SRS control unit of the Honda vehicle. It coordinates the restraint system, evaluates impact signals and triggers the appropriate airbags and seatbelt pretensioners within milliseconds in an accident.

It monitors the system at all times and displays faults via the airbag warning light. After an accident it stores crash data and locks itself.

Without a working control unit, the restraint system cannot perform its task, which is why the electronics run their own self-tests.

Why does the control unit 77960-TR0-T020-M1 fail?

Stored crash data is the most common cause with the 77960-TR0-T020-M1, even where no airbag has triggered. A normal diagnostic tool cannot erase it. Other causes include aged components, solder joints and moisture at plug connections.

Voltage peaks also belong here, for example when the battery is weak or the vehicle is started with a jump start.

Which cause applies in each case is shown only by reading the fault memory.

How can you tell that the 77960-TR0-T020-M1 is defective?

The airbag warning light in the instrument cluster indicates a defect in the 77960-TR0-T020-M1 when it lights up permanently or flashes intermittently. A fault message may also appear on the instrument cluster. In that case, the airbags and seatbelt pretensioners may not trigger in an emergency.

A diagnostic tool that cannot establish a connection to the control unit, and a fault memory that cannot be cleared, are further indications. Have such signs checked promptly.

Which vehicles is the 77960-TR0-T020-M1 fitted in?

The 77960-TR0-T020-M1 is fitted in these vehicles: Honda Civic 9th generation (2011-2017). Ideally, check whether it applies to your car using the vehicle identification number.

The list in detail:

• Honda Civic 9th generation (2011-2017)

Comparing the part number on the label of the removed unit with this page only confirms that you have the right unit. Have the fault memory read before removal, because only that 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-TS4-U411-M1, 77960-TS4-U811-M2, 77960-TS4-Z611-M1, 77960-TS6-H711-M1, 77960-TT0-T011-M1, 77960-TT0-Y610-M2.

How does the repair of the 77960-TR0-T020-M1 work?

First have the fault memory read and the log attached; then disconnect the battery and remove the 77960-TR0-T020-M1. Afterwards create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 inspects the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Your own unit is then 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-TR0-T020-M1 get to Airbag24?

You send the 77960-TR0-T020-M1 as a parcel to Airbag24, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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