Airbag control unit with part number 77960-TLA-Z110-M4

What does the airbag control unit 77960-TLA-Z110-M4 do?

As the central control unit of the restraint system (SRS) of Honda, the airbag control unit 77960-TLA-Z110-M4 works. It records the signals from the crash sensors, and in an accident it decides within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

The system is monitored without interruption during operation. If a fault occurs, it appears on the airbag warning light in the instrument cluster; this is exactly what you watch for in everyday use.

Why does the control unit 77960-TLA-Z110-M4 fail?

The storing of crash data after an accident is considered the most common cause on the 77960-TLA-Z110-M4, even if no airbag was triggered. Such data cannot be removed with a common diagnostic tool.

Crash data of this kind arises after an accident, and Airbag24 deletes it as part of the repair.

Aged electronic components are also possible, as are cold solder joints. Moisture and corrosion at plug connections, as well as voltage spikes, for example from a weak battery or a jump start, can likewise lead to a malfunction.

How can you tell that the 77960-TLA-Z110-M4 is defective?

A defect on the 77960-TLA-Z110-M4 can be read from the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Fault messages and other irregularities may also be among the signs.

These signs may occur individually:

• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

In such a condition, airbags and seatbelt pretensioners may fail to trigger in an emergency. Have the finding checked promptly.

Which vehicles is the 77960-TLA-Z110-M4 fitted in?

The unit 77960-TLA-Z110-M4 is used by Honda in vehicles, namely in these: Honda CR-V 5 (2018-2023).

An overview by model is found here:

• Honda CR-V 5 (2018-2023)

On the one hand, comparing the part number on the label with this page only confirms that you have the right unit. On the other hand, only the fault memory shows whether the control unit itself is defective or whether a plug or cable is causing the fault. So have it read out beforehand.

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-Z110-M4 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only after that remove the control unit 77960-TLA-Z110-M4. Create a repair order online and send in the well-packed unit.

At Airbag24 the unit is checked on the test bench, defective components are repaired and the crash data is deleted. A functional test concludes the work. Processing usually takes 3–4 working days.

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-Z110-M4 get to Airbag24?

You can send the control unit 77960-TLA-Z110-M4 as a parcel or book a UPS collection for an extra charge. Return after the repair is made by UPS.

The printed repair order goes into the parcel; pack the unit shockproof.