Airbag control unit with part number 77960-TLA-Q030-M4

What does the airbag control unit 77960-TLA-Q030-M4 do?

The 77960-TLA-Q030-M4 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors and in an accident decides within milliseconds which airbags and seatbelt pretensioners fire.

Outside an accident the control unit monitors the entire system continuously. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

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

Why does the control unit 77960-TLA-Q030-M4 fail?

The most common cause on the 77960-TLA-Q030-M4 is crash data stored after an accident, even if no airbag has deployed. Other causes include ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. The fact that it can be erased means: Airbag24 removes it during the repair of the unit, and the unit is also checked at the same time.

The other causes concern ageing, connections and the power supply. Electronics age over time, solder joints can go cold, and moisture attacks plug connections. A weak battery or jump-starting can produce voltage spikes that affect the unit.

How can you tell that the 77960-TLA-Q030-M4 is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, through an error message, through the diagnostic tool having no connection to the control unit, or through a fault memory that cannot be erased. In an emergency airbags and seatbelt pretensioners may then possibly not deploy.

The warning light is the most direct indication the vehicle gives. Whoever sees it lit has the system checked promptly and does not drive past it.

Even if the car appears unremarkable in daily use, a fault in the restraint system means that triggering in an emergency is not assured. Every one of these indications should therefore be taken seriously.

Which vehicles is the 77960-TLA-Q030-M4 fitted in?

The 77960-TLA-Q030-M4 is fitted in these vehicles: Honda CR-V 5 (2018-2023). This statement describes the assignment of this control unit to the vehicles named.

The following list shows the vehicles individually, so that the comparison with your own car can be done quickly.

• Honda CR-V 5 (2018-2023)

On the one hand, compare the part number on the label of the removed unit with this page. This only shows that it is the right unit. On the other hand, have the fault memory read out before removal, because only this log 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 5WK43782, 77960-SWA-G212-M4, 77960-SWA-G214-M4, 77960-SWAA-213-M1.

How does the repair of the 77960-TLA-Q030-M4 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is examined on the test bench. Defective components are repaired in the course of the repair, stored crash data is deleted and a functional test is carried out. Afterwards the 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-TLA-Q030-M4 get to Airbag24?

You send the 77960-TLA-Q030-M4 in as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the control unit shock-resistant.