Airbag control unit with part number 77960-T0A-J010-M4

What does the airbag control unit 77960-T0A-J010-M4 do?

The airbag control unit 77960-T0A-J010-M4 is the central processing unit of the restraint system (SRS) of Honda. In the event of an accident, it decides within milliseconds which airbags and seatbelt pretensioners to trigger, relying on signals from the crash sensors.

The unit monitors the system continuously and shows any faults it detects via the airbag warning light. After an accident, it stores crash data and then locks itself.

Why does the control unit 77960-T0A-J010-M4 fail?

The 77960-T0A-J010-M4 most often fails because of stored crash data left over from an accident, even if no airbag was deployed. Other causes include ageing components, dry solder joints, moisture and corrosion on the connectors, and voltage spikes.

A standard diagnostic tool cannot erase this crash data. Airbag24 clears it during the repair. Ageing components and dry solder joints affect the electronics themselves, whereas moisture, corrosion and voltage spikes act on the unit from outside.

A weak battery or a jump start are among the causes of such voltage spikes.

How can you tell that the 77960-T0A-J010-M4 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently when the 77960-T0A-J010-M4 is defective. In addition, fault messages appear in the instrument cluster, the diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared.

The warning light indicates the fault and is therefore the most important everyday signal. As long as it is lit, the airbags and seatbelt pretensioners may not deploy in an emergency. Please have the cause checked promptly.

Which vehicles is the 77960-T0A-J010-M4 fitted in?

The 77960-T0A-J010-M4 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The models in detail:

• Honda CR-V 4 RM (2012-2018)

Comparing the part number on the label of the removed unit with this page only confirms that you have the correct unit in front of you. Also have the fault memory read out beforehand, because only the log shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 5WK43782, 77960-SWA-G212-M4, 77960-SWA-G214-M4, 77960-T1G-G920-M4.

How does the repair of the 77960-T0A-J010-M4 work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the 77960-T0A-J010-M4. Airbag24 usually needs 3–4 working days for checking, repairing and testing.

Then create a repair order online and pack the unit well before sending it. This sequence is mandatory for safety reasons.

At Airbag24, the test bench examines the control unit, defective components are replaced, the crash data is erased and a functional test is carried out. Your own unit is then returned 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-T0A-J010-M4 get to Airbag24?

You send the 77960-T0A-J010-M4 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

The printed repair order goes in the parcel. Pack the control unit shockproof so that it arrives undamaged.