Airbag control unit with part number 77960-SZT-P811-M2

What does the airbag control unit 77960-SZT-P811-M2 do?

At Honda, the airbag control unit 77960-SZT-P811-M2 forms the control unit of the restraint system (SRS). In a crash, it evaluates the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners are triggered. At the same time, it monitors the system continuously.

Faults are shown via the airbag warning light. After a crash, it stores crash data and locks itself.

The unit thus combines detection, decision and reporting in a single component.

Why does the control unit 77960-SZT-P811-M2 fail?

The most common cause is a stored crash data record after an accident, even if no airbag was triggered; an ordinary diagnostic tool does not remove it. In addition, ageing electronics, cold solder joints, moisture and corrosion on plug connections, or voltage spikes can cause faults.

Crash data remains in the control unit until it is removed. Airbag24 takes care of this during the repair.

Ageing electronic components can fail, cold solder joints lose contact, and moisture together with corrosion attacks plug connections. Voltage spikes from a weak battery or jump-starting also stress the electronics.

How can you tell that the 77960-SZT-P811-M2 is defective?

A defect shows up as an airbag warning light that stays on permanently or at times, as a fault message in the instrument cluster, as a diagnostic tool that cannot establish a connection to the control unit, and as a fault memory that cannot be cleared.

The warning light is therefore the clearest signal. As long as the fault exists, the airbags and seatbelt pretensioners may not trigger in an emergency.

So have the fault memory read out promptly, so that the cause can be narrowed down.

Which vehicles is the 77960-SZT-P811-M2 fitted in?

The vehicle assignment depends on part number 77960-SZT-P811-M2. The airbag control unit 77960-SZT-P811-M2 is fitted in these vehicles: Honda CR-Z ZF1 (2010-2016).

The following vehicles are assigned to this part number:

• Honda CR-Z ZF1 (2010-2016)

Comparing the part number on the removed unit with this page shows whether it is the correct unit, and nothing more. Whether the control unit is faulty, or a plug or cable is the cause, is shown by the fault memory. So have it read out before the next step.

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-P811-M2 work?

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

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. The unit then goes back to you.

Checking, repairing and testing take 3–4 working days at Airbag24 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-SZT-P811-M2 get to Airbag24?

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

Enclose the printed repair order in the parcel, and pack the unit shockproof.