Airbag control unit with part number 77960-T0A-H911-M4

What does the airbag control unit 77960-T0A-H911-M4 do?

The airbag control unit 77960-T0A-H911-M4 controls the SRS restraint system at Honda. It checks the signals from the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds in an accident, and reports faults via the airbag warning light.

In normal operation it monitors the system continuously. After an accident it stores crash data and locks itself.

Why does the control unit 77960-T0A-H911-M4 fail?

The most common cause is crash data from an accident, even if no airbag has deployed. This data cannot be removed with a standard diagnostic tool. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example with a weak battery or after a jump start, may also be causes.

The fact that the vehicle drives normally therefore says nothing about the memory contents. Crash data stays in the unit.

Which of these causes actually applies is determined only by the test on the test bench.

How can you tell that the 77960-T0A-H911-M4 is defective?

A defect shows up as the airbag warning light, as a fault message in the instrument cluster, as a diagnostic tool without contact to the control unit and as a fault memory that cannot be cleared.

The warning light shows the defect as soon as the system detects it. In that case, arrange a check promptly instead of ignoring the indicator.

In the event of a fault, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

Which vehicles is the 77960-T0A-H911-M4 fitted in?

The 77960-T0A-H911-M4 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

Our assignment contains the following entry for this unit:

• Honda CR-V 4 RM (2012-2018)

A comparison of the part number on the label of the removed unit with this page only shows whether the unit fits. Reliable information about the condition comes only from the fault memory, which you should have read out before removal.

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-H911-M4 work?

First the fault memory is read out, and you attach the log to the unit. Next, disconnect the battery and only then remove the control unit. Finally, create a repair order online and pack the unit well for sending.

At Airbag24 the unit is examined on the test bench, and defective components are replaced. Afterwards Airbag24 erases the stored crash data and carries out a function test; processing takes 3–4 working days as a rule. After that your own unit 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-T0A-H911-M4 get to Airbag24?

You can send the 77960-T0A-H911-M4 in as a parcel or book a UPS collection for an extra charge. After the repair you receive the unit back via UPS.

Put the printed repair order in the parcel, and pack the unit shockproof.