Airbag control unit with part number 77960-31E-H430-M1

What does the airbag control unit 77960-31E-H430-M1 do?

The airbag control unit 77960-31E-H430-M1 is the central control unit of the restraint system (SRS) in Honda. It evaluates the crash sensors and, in a crash, decides within a few milliseconds which airbags and seatbelt pretensioners are triggered.

During operation it checks the components of the system continuously. Faults are reported via the airbag warning light.

After an accident the unit stores crash data and locks itself.

Why does the control unit 77960-31E-H430-M1 fail?

The most common cause of a failure of the control unit 77960-31E-H430-M1 is crash data stored after an accident, even without a triggered airbag. Aged components, cold solder joints, moisture and corrosion, and voltage spikes are added to this.

Crash data cannot be erased with a normal diagnostic tool. The problem therefore remains even after reading it out.

Aged components and cold solder joints develop over a longer period. Moisture and corrosion on plug connections can disrupt the function.

Voltage spikes occur, for example, with a weak battery or when a jump start is given.

How can you tell that the 77960-31E-H430-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition, an error message appears, and the diagnostic tool gets no connection to the control unit 77960-31E-H430-M1; the fault memory cannot be cleared.

The control unit therefore signals the fault via the light, and the error message is visible in the instrument cluster. In an emergency, airbags and seatbelt pretensioners may then not trigger.

Which vehicles is the 77960-31E-H430-M1 fitted in?

The control unit 77960-31E-H430-M1 is fitted in these vehicles: Honda Civic 11th generation (from 2021). The part number on the unit shows whether this assignment fits.

The assignment at a glance:

• Honda Civic 11th generation (from 2021)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the right unit. Also have the fault memory read out beforehand, because only this result shows whether the control unit itself is defective or whether a plug or a cable is the cause.

How does the repair of the 77960-31E-H430-M1 work?

First, have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit 77960-31E-H430-M1. Processing at Airbag24 usually takes 3–4 working days.

Afterwards create the repair order online, pack the unit well and send it in. Airbag24 checks it, repairs defective components, erases stored crash data and carries out a function test. The unit then 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 77960-31E-H430-M1 get to Airbag24?

You send the control unit 77960-31E-H430-M1 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 shock-proof.