Airbag control unit with part number 77960-TR0-Q020-M1

What does the airbag control unit 77960-TR0-Q020-M1 do?

The airbag control unit 77960-TR0-Q020-M1 is the central control unit of the restraint system (SRS) for Honda. It evaluates the signals from the crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners to trigger, and monitors the system continuously.

Reported faults are shown by the airbag warning light. To do this, the control unit checks the connected components.

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

Why does the control unit 77960-TR0-Q020-M1 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot delete it. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Which of these causes applies cannot be determined without reading the fault memory. A plug or a cable can trigger similar warnings to the unit itself.

Voltage spikes occur, for example, with a weak battery or when jump-starting. That is why it is worth checking the fault memory, especially after an accident.

How can you tell that the 77960-TR0-Q020-M1 is defective?

A defect shows mainly on the airbag warning light in the instrument cluster and on the messages there. A diagnostic connection and the fault memory also give clues.

• The airbag warning light stays on permanently or intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool cannot connect to the control unit.
• The fault memory cannot be cleared.

If the restraint system is faulty, airbags and seatbelt pretensioners may not trigger in an emergency. The warning light indicates the finding, so a prompt check is advisable.

Which vehicles is the 77960-TR0-Q020-M1 fitted in?

Here you can see which vehicles this number is listed for with us. The 77960-TR0-Q020-M1 is fitted in these vehicles: Honda Civic 9th generation (2011-2017).

The overview lists the vehicles individually.

• Honda Civic 9th generation (2011-2017)

Compare the part number on the label of the removed unit with this page to make sure it is the right unit. Have the fault memory read out beforehand, because only the log shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-TS4-U411-M1, 77960-TS4-U811-M2, 77960-TS4-Z611-M1, 77960-TS6-H711-M1, 77960-TT0-T011-M1, 77960-TT0-Y610-M2.

How does the repair of the 77960-TR0-Q020-M1 work?

Have the fault memory read out, attach the log, and disconnect the battery before you remove the control unit. Create a repair order online and send in the well-packed unit. At Airbag24, processing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components and deletes stored crash data. A function test follows, after which your own 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-TR0-Q020-M1 get to Airbag24?

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

Put the printed repair order into the parcel and pack the unit shockproof.