Airbag control unit with part number 77960-SZW-J414-M3

What does the airbag control unit 77960-SZW-J414-M3 do?

The airbag control unit 77960-SZW-J414-M3 is the central control unit of the restraint system (SRS) of Honda. It evaluates the signals from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit reports detected faults via the airbag warning light in the instrument cluster. This way the driver can see whether something is wrong with the system.

After an accident, the unit stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 77960-SZW-J414-M3 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

Airbag24 erases the crash data during the repair. Until then, it stays in the unit's memory, regardless of how visible the accident was.

Aged components and cold solder joints develop over a longer period. Moisture and corrosion wear down plug connections, and voltage spikes arise, for example, from a weak battery or a jump start.

How can you tell that the 77960-SZW-J414-M3 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, a fault message appears, the diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared.

As long as the light shows a fault, airbags and seatbelt pretensioners may not trigger in an emergency. A lit warning light is therefore a reason to act promptly.

A single sign does not reveal the cause. Only reading out the fault memory shows whether the control unit is affected.

Which vehicles is the 77960-SZW-J414-M3 fitted in?

The 77960-SZW-J414-M3 is fitted in these vehicles: Honda Stepwgn 3rd generation (2005-2009).

The following vehicles are on record for this part number:

• Honda Stepwgn 3rd generation (2005-2009)

Comparing the part number on the label of the removed unit with this page ensures that you have the right unit. The comparison goes no further than that.

Have the fault memory read out before removal. The result shows whether the control unit is defective or whether a plug or a cable is the cause.

How does the repair of the 77960-SZW-J414-M3 work?

First, you have the fault memory read out and attach the log. Then you disconnect the battery and only after that remove the control unit. Then you create a repair order online and send the unit in well packed.

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

Processing at Airbag24 usually takes 3–4 working days. This time applies only to checking, repairing and testing in-house.

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-SZW-J414-M3 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 control unit so that it is shockproof.