Airbag control unit with part number 77960-T2A-Z912-M1

What does the airbag control unit 77960-T2A-Z912-M1 do?

The airbag control unit 77960-T2A-Z912-M1 controls the restraint system (SRS) of Honda. It evaluates the crash sensors, decides within milliseconds in the event of an accident whether airbags and seatbelt pretensioners are triggered, and checks the system continuously. It indicates faults via the airbag warning light.

While the vehicle is in operation, the unit works in the background and checks the connected components.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 77960-T2A-Z912-M1 fail?

The most common cause is stored crash data after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other causes include ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from a weak battery or jump-starting.

Stored crash data remains in the unit, because a normal diagnostic tool cannot remove it. The link with the accident exists even if no airbag was triggered.

The other causes develop over a longer period. Electronics age, solder joints can stay cold, moisture and corrosion attack plug connections, and voltage spikes from a weak battery or jump-starting put a strain on the electronics.

How can you tell that the 77960-T2A-Z912-M1 is defective?

The airbag warning light in the instrument cluster stays on constantly or intermittently, and the instrument cluster shows an error message. In addition, the diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared. In this case, the airbags and seatbelt pretensioners may possibly fail to trigger in an emergency.

• The airbag warning light stays on constantly or intermittently.
• The instrument cluster displays an error message.
• The diagnostic tool finds no connection to the control unit.
• The fault memory cannot be cleared.

A plug or a cable can also lie behind these signs. Reading out the fault memory shows what the cause is.

Which vehicles is the 77960-T2A-Z912-M1 fitted in?

A different part number is not meant here, even if it is the same make. The 77960-T2A-Z912-M1 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

This overview shows the vehicles:

• Honda CR-V 4 RM (2012-2018)

Match the part number on the label of the removed unit with this page; this only shows that it is the right unit. Have the fault memory read out before removal, because only the log clarifies whether the control unit is defective or whether a plug 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-Z912-M1 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit. Next, create a repair order online and send the unit off, well packed.

Airbag24 checks the unit on the test bench, replaces defective components, clears the stored crash data and carries out a function test. Afterwards, the unit is returned to you.

At Airbag24, checking, repairing and testing take 3–4 working days as a rule.

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-Z912-M1 get to Airbag24?

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

Place the printed repair order in the parcel and pack the unit securely against impact.