Airbag control unit with part number 77960-TR0-H914-M1

What does the airbag control unit 77960-TR0-H914-M1 do?

The airbag control unit 77960-TR0-H914-M1 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors, decides in the event of an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows faults via the airbag warning light. After an accident it stores crash data and locks itself.

The decision to trigger is made within milliseconds, while the accident is still happening. In normal operation the unit continuously checks the connected sensors, the wiring and the output stages.

Why does the control unit 77960-TR0-H914-M1 fail?

The most common cause is stored crash data from an accident, even if no airbag triggered; a standard diagnostic tool cannot delete it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

An event without airbag triggering can therefore still lead to crash data in the unit.

The other causes develop gradually. Electronics age, solder joints become brittle, and moisture makes contacts corrode. A weak battery or jump-starting can also produce voltage spikes that attack the electronics.

How can you tell that the 77960-TR0-H914-M1 is defective?

A defect shows up first on the airbag warning light in the instrument cluster, which lights up constantly or only intermittently. A fault message in the instrument cluster may be added, or the diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared.

As long as the warning light is on, airbags and seatbelt pretensioners may not be able to trigger in an emergency. Do not ignore this warning; have it clarified promptly.

The light only indicates that something is wrong. The cause only becomes clear when the fault memory is read out.

Which vehicles is the 77960-TR0-H914-M1 fitted in?

Assignment is by part number, not by a designation. The 77960-TR0-H914-M1 is fitted in these vehicles: Honda Civic 9th generation (2011-2017).

The vehicles for which this number is on record are listed here:

• Honda Civic 9th generation (2011-2017)

Compare the number on the label of the removed unit with this page; this way you can be sure it is the correct unit. Have the fault memory read out beforehand: only the log shows whether the control unit is defective or whether a plug or a 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-H914-M1 work?

Have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Create a repair order online, pack the unit well and send it in. At Airbag24, testing, repair and functional testing usually take 3–4 working days.

Airbag24 first examines the unit on the test bench and replaces defective components. Then the stored crash data is deleted and a functional test is carried out.

Afterwards your own unit goes back 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-H914-M1 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, the unit is sent back to you by UPS.

Put the printed repair order in the parcel and pack the unit shock-resistant.