Airbag control unit with part number 77960-T6A-P140-M2

What does the airbag control unit 77960-T6A-P140-M2 do?

The airbag control unit 77960-T6A-P140-M2 coordinates the restraint system (SRS) in Honda. It reads the signals from the crash sensors, decides within milliseconds in the event of an accident which airbags and seatbelt pretensioners to trigger, and checks the system continuously during operation. After an accident it stores crash data and locks itself.

The self-test detects faults in the circuits and components of the system. Any faults found are reported by the device via the airbag warning light in the instrument cluster and stored in the fault memory.

Because all deployments run through this control unit, the function of the entire system depends on it. Even a fault in the evaluation can therefore impair the whole restraint system.

Why does the control unit 77960-T6A-P140-M2 fail?

The fault can be caused by crash data stored after an accident, even if no airbag has deployed. A standard diagnostic tool cannot erase it; Airbag24 deletes it during the repair. Other possible causes are aged electronics, cold solder joints, moisture and corrosion at connectors, or voltage spikes.

The fact that no airbag has deployed therefore does not mean that nothing was stored. The control unit records the data after an accident, regardless of whether the airbags fired.

Aged electronic components and cold solder joints can lead to failures over time.

Moisture and corrosion at connectors degrade the contact. Voltage spikes, for example from a weak battery or a jump start, put additional strain on the electronics.

How can you tell that the 77960-T6A-P140-M2 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. It thus indicates a defect, and a fault message can also appear.

A diagnostic tool does not get a connection to the control unit, and the fault memory cannot be cleared. These findings also belong to the picture of a defect and deserve your attention.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Have the system checked promptly.

Which vehicles is the 77960-T6A-P140-M2 fitted in?

The 77960-T6A-P140-M2 is fitted in these vehicles: Honda Odyssey 5th generation (from 2013).

The overview below shows the vehicles assigned to this part number.

• Honda Odyssey 5th generation (from 2013)

Check the part number on the label of the removed unit against this page. This only ensures that it is the correct unit. Have the fault memory read out before you remove the unit, because only then will it be clear 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-THR-A02, 77960-THR-A03, 77960-TK8-A011-M1, 77960-TK8-D01.

How does the repair of the 77960-T6A-P140-M2 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Then create a repair order online and send in the well-packed device.

Airbag24 first tests the device on the test bench and replaces defective components. Airbag24 then deletes the stored crash data and carries out a function test before your own unit is returned to you. Processing at Airbag24 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-T6A-P140-M2 get to Airbag24?

The shipment is made either as a parcel that you send yourself, or as a UPS collection that you book for an extra charge. After the repair Airbag24 sends your device back by UPS.

You put the printed repair order in the parcel, and pack the control unit shock-proof.