Airbag control unit with part number 77960-TR0-K813-M1

What does the airbag control unit 77960-TR0-K813-M1 do?

The airbag control unit 77960-TR0-K813-M1 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After a crash it stores crash data and locks itself; the lock is only lifted by the repair.

The unit reports faults via the airbag warning light in the instrument cluster, which shows the state of the overall system.

Why does the control unit 77960-TR0-K813-M1 fail?

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

The crash data stays inside the unit itself and remains there until Airbag24 deletes it during the repair. The unit then comes back without this data.

The other causes show up over a longer period. Plug contacts corrode, solder joints age, and voltage peaks when starting, for example with a weak battery, strain the circuits.

How can you tell that the 77960-TR0-K813-M1 is defective?

A defect shows up as the airbag warning light in the instrument cluster, as fault messages in the instrument cluster, as a missing connection between the diagnostic tool and the control unit, or as a fault memory that cannot be cleared. In a real crash, airbags and seatbelt pretensioners may then fail to deploy.

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

The light indicates a detected fault, which is why it is the first reason for a check.

Which vehicles is the 77960-TR0-K813-M1 fitted in?

The control unit 77960-TR0-K813-M1 is fitted in these vehicles: Honda Civic 9th generation (2011-2017).

The following overview lists the vehicles this unit is intended for.

• Honda Civic 9th generation (2011-2017)

Compare the part number on the label of the removed unit with this page to make sure it is the right unit. Also have the fault memory read out before sending the unit in, 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-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-K813-M1 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit 77960-TR0-K813-M1. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Airbag24 needs 3–4 working days as a rule for these steps, after which your own unit is sent 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-TR0-K813-M1 get to Airbag24?

You send the control unit 77960-TR0-K813-M1 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

The printed repair order goes into the parcel, and you pack the unit shockproof.