Airbag control unit with part number 77960-TR0-D011-M2

What does the airbag control unit 77960-TR0-D011-M2 do?

The 77960-TR0-D011-M2 is the central control unit of the restraint system (SRS) for Honda. It processes the messages from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

During operation the unit monitors the entire chain of sensors, wiring and triggers. The check runs in the background and is not noticeable to you in everyday use.

It is therefore not a component that is checked only at times, but a unit that checks itself continuously. It reports faults via the airbag warning light.

Why does the control unit 77960-TR0-D011-M2 fail?

The most common cause of the failure of the 77960-TR0-D011-M2 is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase them. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes from a weak battery or jump-starting.

The crash data stay in the memory even when the vehicle drives normally again. They are therefore the first point a check finds in the fault memory.

The other causes are rather gradual: plug connections can corrode, components age, and the on-board voltage can fluctuate briefly but strongly.

How can you tell that the 77960-TR0-D011-M2 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. A fault message may appear alongside it, the diagnostic tool receives no connection to the 77960-TR0-D011-M2, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may not be able to deploy. Therefore have such a finding checked promptly, before the vehicle is used further in everyday traffic.

The warning light shows the finding even when the vehicle drives inconspicuously.

Which vehicles is the 77960-TR0-D011-M2 fitted in?

The 77960-TR0-D011-M2 is fitted in this vehicle: Honda Civic 9th generation (2011-2017).

The overview shows the models to which this part number belongs:

• Honda Civic 9th generation (2011-2017)

Compare the part number on the label of the removed unit with this page, and you will know for certain that it is the right unit. Whether the control unit is defective or a plug or cable is the cause is shown only by reading out the fault memory beforehand.

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-D011-M2 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery and only afterwards remove the 77960-TR0-D011-M2. Last, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days.

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-D011-M2 get to Airbag24?

You send the control unit 77960-TR0-D011-M2 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Enclose the printed repair order with the parcel and pack the unit shockproof.