Airbag control unit with part number 77960-SZT-J411-M2

What does the airbag control unit 77960-SZT-J411-M2 do?

The airbag control unit 77960-SZT-J411-M2 controls the airbags and seatbelt pretensioners of the restraint system (SRS) at Honda. It evaluates the crash sensors, decides in an accident within milliseconds on triggering, and monitors the system permanently. It reports detected faults via the airbag warning light.

The system is only reliable if the control unit itself always works correctly. The unit therefore checks itself continuously.

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

Why does the control unit 77960-SZT-J411-M2 fail?

A failure can result from crash data that the unit stored after an accident, even if no airbag was triggered. A standard diagnostic tool cannot erase it. Airbag24 erases the data during the repair.

Other causes to consider:

• ageing of the electronic components
• cold solder joints on the circuit board
• 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-SZT-J411-M2 is defective?

A defect can announce itself through the airbag warning light in the instrument cluster, which stays on permanently or intermittently. Further signs are a fault message in the instrument cluster, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

As long as these signs occur, airbags and seatbelt pretensioners may fail to trigger in an emergency. A check by a specialist workshop then gives certainty about the cause.

Which vehicles is the 77960-SZT-J411-M2 fitted in?

The part number 77960-SZT-J411-M2 belongs to Honda. The control unit 77960-SZT-J411-M2 was fitted in these vehicles: Honda CR-Z ZF1 (2010-2016).

Whether your vehicle is affected can be read from this list.

• Honda CR-Z ZF1 (2010-2016)

Have the fault memory read out before you remove the control unit. Only then is it clear whether the unit itself is defective or whether a cable or plug is the cause. Then compare the part number on the label with this page.

For the same vehicles, we also repair control units with the part numbers 77960-SZT-A011, 77960-SZT-A011-M2.

How does the repair of the 77960-SZT-J411-M2 work?

Airbag24 needs 3–4 working days as a rule for checking, repairing and testing. Before removal, read out the fault memory, remove the control unit and create the repair order online.

Enclose the log, disconnect the battery and pack the unit well before sending it in.

At Airbag24 the unit is checked on the test bench, defective components are replaced, the crash data is erased and a function test is carried out. The unit then goes back 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-SZT-J411-M2 get to Airbag24?

You send the unit 77960-SZT-J411-M2 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Print the repair order and enclose it with the parcel. A shock-proof box protects the unit.