Airbag control unit with part number 77960-TLA-Y110-M4

What does the airbag control unit 77960-TLA-Y110-M4 do?

The airbag control unit 77960-TLA-Y110-M4 is responsible for the restraint system (SRS) in Honda. It checks the signals from the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are to be triggered, and monitors the system continuously. Faults are displayed via the airbag warning light.

After an accident the unit stores crash data and locks itself. This recording runs alongside the control of the triggering.

Both functions affect the later checks on the unit, which is why it helps to know this dual role.

Why does the control unit 77960-TLA-Y110-M4 fail?

Stored crash data after an accident is the most common cause of the 77960-TLA-Y110-M4, even if no airbag has deployed. Aged components, cold solder joints, moisture on plug connections and voltage spikes are also possible causes.

You cannot delete crash data with a normal diagnostic tool. Airbag24 removes it as part of the repair.

The other causes affect the electronics through ageing, moisture and voltage spikes.

How can you tell that the 77960-TLA-Y110-M4 is defective?

A defect in the 77960-TLA-Y110-M4 shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. In addition, a fault message in the instrument cluster and a fault memory that cannot be cleared may appear.

In an emergency, airbags and seatbelt pretensioners may possibly not deploy as a result. The signs at a glance:

• the airbag warning light is on permanently or intermittently
• fault message in the instrument cluster
• the diagnostic tool gets no connection to the control unit
• the fault memory cannot be cleared

Which vehicles is the 77960-TLA-Y110-M4 fitted in?

Compare your vehicle with the list before removal. The control unit 77960-TLA-Y110-M4 is fitted in these vehicles: Honda CR-V 5 (2018-2023).

These vehicles use the control unit:

• Honda CR-V 5 (2018-2023)

Firstly, compare the part number on the label of the removed unit with this page; that only clarifies the identity of the unit. Secondly, have the fault memory read out beforehand, because only its log shows whether the control unit itself 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-Y110-M4 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit 77960-TLA-Y110-M4. Processing at Airbag24 usually takes 3–4 working days.

The sequence protects you when working on the airbag system.

Only then do you create the repair order online and send the unit in well packed. At Airbag24 it is checked on the test bench, components are repaired or replaced, crash data is deleted and a function test is carried out. After that your own unit is returned.

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-Y110-M4 get to Airbag24?

Your 77960-TLA-Y110-M4 comes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair Airbag24 sends the unit back to you by UPS.

Enclose the printed repair order in the parcel and pack the unit shock-proof.