Airbag control unit with part number 77960-T2A-M530-M1

What does the airbag control unit 77960-T2A-M530-M1 do?

The airbag control unit 77960-T2A-M530-M1 is the central component of the SRS restraint system in Honda. It checks the signals from the crash sensors, decides within milliseconds in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows faults via the airbag warning light.

The unit makes the decision on the basis of the sensor values it records without interruption. In doing so it also checks its own connections, so that faults are noticed in good time.

After a crash, the control unit stores crash data and locks itself.

Why does the control unit 77960-T2A-M530-M1 fail?

The most common cause is crash data left in memory after an accident, even if no airbag has deployed; the normal diagnostic tool cannot remove it. Also possible are aged electronics, cold solder joints, moisture and corrosion on connectors, and voltage spikes from a weak battery or a jump start.

Ageing, moisture and voltage spikes affect electronics in general. Which cause applies here is only established by the read-out.

How can you tell that the 77960-T2A-M530-M1 is defective?

The airbag warning light in the instrument cluster lights up permanently or from time to time, and an error message appears in the instrument cluster. In addition, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

As long as the light is on, airbags and seatbelt pretensioners may not deploy in an emergency. Such a warning should therefore be checked promptly.

Which fault exactly is present is shown only by the fault memory. The light alone does not name the cause.

Which vehicles is the 77960-T2A-M530-M1 fitted in?

Comparing with the vehicle list shows whether your car matches the part number. The airbag control unit 77960-T2A-M530-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The list shows these vehicles:

• Honda CR-V 4 RM (2012-2018)

Before removal, compare the part number on the label with this page. That only confirms that you have the right unit. Also have the fault memory read out beforehand, because only this log shows whether the control unit itself is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-T0A-3070-M4, 77960-T0A-A012-M1, 77960-T0A-A013-M1, 77960-T0A-A210-M1, 77960-T0A-A212-M1, 77960-T0A-A230-M1.

How does the repair of the 77960-T2A-M530-M1 work?

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

Airbag24 checks the unit on the test bench, repairs defective components, deletes the crash data and carries out a function test before the unit is returned 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-T2A-M530-M1 get to Airbag24?

You send the unit as a parcel to Airbag24, or you arrange for UPS to collect it from you for an extra charge. After the repair, the return is made by UPS.

The printed repair order goes into the parcel; pack the unit shock-proof.