Airbag control unit with part number 77960-TS8-K012-M4

What does the airbag control unit 77960-TS8-K012-M4 do?

The airbag control unit 77960-TS8-K012-M4 forms the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and reports faults via the airbag warning light.

While driving the unit monitors the system permanently. Detected faults are stored in the fault memory, which a diagnostic tool can read out.

After an accident the unit stores crash data and locks itself. This also applies to accidents in which no airbag was deployed.

Why does the control unit 77960-TS8-K012-M4 fail?

The most common cause is stored crash data after an accident, even if no airbag deployed. Other possible causes are aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or a jump start

Crash data cannot be erased with a standard diagnostic tool. If you notice faults after an accident, look at this data first.

How can you tell that the 77960-TS8-K012-M4 is defective?

A defect shows up as an airbag warning light in the instrument cluster that stays on permanently or intermittently, a fault message in the instrument cluster, a missing connection to the diagnostic tool, or a fault memory that cannot be cleared.

If you notice any of these signs, airbags and seatbelt pretensioners may fail to deploy in an emergency. Have the cause checked promptly and do not simply carry on driving.

Which vehicles is the 77960-TS8-K012-M4 fitted in?

The 77960-TS8-K012-M4 is fitted in these vehicles: Honda Civic 9th generation (2011-2017). The details help with an initial classification before you remove a unit.

The following overview shows the vehicles on record:

• Honda Civic 9th generation (2011-2017)

Before removal, compare the part number on the label of the unit with this page. That only confirms that you have the right unit. Have the fault memory read out, because this log alone shows whether the control unit is defective or 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-TS8-K012-M4 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Next create a repair order online and send the unit in well packed. At Airbag24 processing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and runs a functional test. Afterwards your own unit goes back to you.

This time frame applies only to checking, repairing and testing at Airbag24.

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-TS8-K012-M4 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 brings it back to you by UPS.

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