Airbag control unit with part number 77960-TLA-R110-M4

What does the airbag control unit 77960-TLA-R110-M4 do?

The airbag control unit 77960-TLA-R110-M4 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors and decides in an emergency, within milliseconds, which airbags and seatbelt pretensioners are triggered.

It also monitors the system continuously. It indicates faults via the airbag warning light in the instrument cluster.

After an accident, the unit stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit 77960-TLA-R110-M4 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Other causes include aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. This also applies when the airbags did not trigger.

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

Which of these causes applies in an individual case only becomes clear during the check.

How can you tell that the 77960-TLA-R110-M4 is defective?

A defect shows up as the airbag warning light staying on permanently or intermittently, and as a fault message in the instrument cluster. The diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

If the system is faulty, airbags and seatbelt pretensioners may not trigger in an emergency. A lit warning light should therefore not be ignored.

Even a warning light that comes on only briefly is a sign you should have checked.

Which vehicles is the 77960-TLA-R110-M4 fitted in?

The 77960-TLA-R110-M4 is fitted in these vehicles: Honda CR-V 5 (2018-2023).

The following vehicles are stored for this part number:

• Honda CR-V 5 (2018-2023)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit.

Have the fault memory read out beforehand. Only the result shows whether the control unit is defective or whether a plug or a 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-R110-M4 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

This period only covers checking, repairing and testing at Airbag24. Afterwards you create a repair order online and send the unit in, well packed.

Airbag24 checks it on the test bench, replaces defective components, erases the crash data and carries out a function test. Your own unit then 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-R110-M4 get to Airbag24?

You send the control unit 77960-TLA-R110-M4 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

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