Airbag control unit with part number 77960-TM8-A031-M2

What does the airbag control unit 77960-TM8-A031-M2 do?

The 77960-TM8-A031-M2 is the central control unit of the restraint system (SRS) of Honda. It analyses the crash sensors, decides in a crash on airbags and seatbelt pretensioners, and monitors the system continuously.

The control unit reports faults via the airbag warning light in the instrument cluster. The driver can thus recognise early that something in the system is wrong.

After a crash it stores crash data and locks itself. Every proper inspection takes this condition into account first.

Why does the control unit 77960-TM8-A031-M2 fail?

With 77960-TM8-A031-M2 the most common cause is crash data from an accident, even if no airbag was deployed. With this control unit, erasing the crash data is often not possible, so please contact Airbag24 briefly before sending it in.

A normal diagnostic tool cannot erase the crash data, so it remains in the memory. The other causes can be summarised as follows:

• ageing electronic components,
• cold solder joints,
• moisture and corrosion at plug connections,
• voltage spikes, for example from a weak battery or a jump start.

How can you tell that the 77960-TM8-A031-M2 is defective?

A defect on the 77960-TM8-A031-M2 is indicated by the airbag warning light in the instrument cluster as soon as it lights up permanently or intermittently. Error messages, a lost connection to the diagnostic tool and a fault memory that cannot be cleared are also signs.

The airbag warning light remains the most important hint the vehicle gives. If it lights up permanently or only now and then, this sign should be checked.

In an emergency the airbags and seatbelt pretensioners may then fail to trigger, so the warning light must not be ignored.

Which vehicles is the 77960-TM8-A031-M2 fitted in?

This control unit 77960-TM8-A031-M2 is fitted in these vehicles: Honda Insight 2nd generation (2009-2014).

The following list names the vehicles in detail.

• Honda Insight 2nd generation (2009-2014)

Have the part number on the label compared with this page; that only confirms the right unit. Whether the control unit itself is affected or a plug or cable, only the fault memory shows. So have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 77960-TM8-A01, 77960-TM8-A020-M2, 77960-TM8-A03.

How does the repair of the 77960-TM8-A031-M2 work?

First have the fault memory read out and attach the log. Then disconnect the battery, only then remove the 77960-TM8-A031-M2, and create a repair order online.

If you would like the crash data erased, please contact Airbag24 briefly before sending. Then send the unit well packed.

Airbag24 tests the unit on the test bench, repairs defective components and carries out a function test. Processing at Airbag24 usually takes 3–4 working days.

The unit, which is your own, is then 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-TM8-A031-M2 get to Airbag24?

You can send the 77960-TM8-A031-M2 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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