Airbag control unit with part number 77960-TLA-H140-M4

What does the airbag control unit 77960-TLA-H140-M4 do?

The airbag control unit 77960-TLA-H140-M4 takes over control of the restraint system (SRS) at Honda. It processes the signals from the crash sensors, decides within milliseconds in an accident on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously.

The unit shows faults via the airbag warning light in the instrument cluster. At the same time, the fault information stays in memory so that it can be read out.

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

Why does the control unit 77960-TLA-H140-M4 fail?

The most common cause for the 77960-TLA-H140-M4 is crash data stored after an accident, even without a triggered airbag. Further causes are aged components, cold solder joints, moisture and corrosion on the plugs, and voltage spikes.

The crash data remains in the unit, and a standard diagnostic tool cannot erase it. Airbag24 clears it in the course of the repair.

The other causes come from the electrics. Aged electronics, moisture on the plug connections and voltage spikes, for example from a weak battery or a jump-start, can likewise disturb a control unit.

How can you tell that the 77960-TLA-H140-M4 is defective?

These signs point to a defect on the 77960-TLA-H140-M4. In an emergency, airbags and seatbelt pretensioners may possibly fail to trigger.

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

The warning light is a clear signal. Take it seriously and have the system checked promptly.

Which vehicles is the 77960-TLA-H140-M4 fitted in?

The control unit 77960-TLA-H140-M4 is fitted in these vehicles: Honda CR-V 5 (2018-2023). The decisive factor is the part number on the unit, not the vehicle name alone.

These vehicles are assigned to the part number:

• Honda CR-V 5 (2018-2023)

Comparing the part number on the label of the removed unit with this page only confirms that you have the right unit. What is wrong with it is shown only by reading out the fault memory, which you should arrange 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-SWAA-213-M1.

How does the repair of the 77960-TLA-H140-M4 work?

Have the fault memory read out and enclose the protocol. Only then disconnect the battery and remove the control unit. Afterwards create a repair order online and send in the unit.

Airbag24 checks the unit on the test bench, replaces the defective components, erases the stored crash data and runs a function test. Processing usually takes 3–4 working days.

Afterwards your own control 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-H140-M4 get to Airbag24?

You send the unit to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

The printed repair order belongs in the parcel. Pack the control unit shock-proof.