Airbag control unit with part number 77960-TF0-U632-M3

What does the airbag control unit 77960-TF0-U632-M3 do?

The airbag control unit 77960-TF0-U632-M3 controls the restraint system (SRS) in Honda vehicles. It evaluates the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

During operation, the unit monitors the entire system. If it finds a fault, it reports it via the airbag warning light in the instrument cluster.

After an accident, the control unit stores crash data and locks itself. Only the repair lifts the lock.

Why does the control unit 77960-TF0-U632-M3 fail?

The cause is most often crash data stored after an accident, even if no airbag has deployed. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. The fault therefore persists, even though nothing conspicuous can be seen on the vehicle. Airbag24 erases the data during the repair.

The other causes build up slowly. A component ages, a solder joint goes cold, and moisture gets into a plug contact. Faults of this kind are hard to pin down without testing.

How can you tell that the 77960-TF0-U632-M3 is defective?

A defect shows up as the airbag warning light in the instrument cluster staying on permanently or intermittently. In addition, there is an error message in the instrument cluster, a diagnostic tool without connection to the control unit, and a fault memory that cannot be cleared.

• Airbag warning light stays on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

If you notice these signs, have the system checked promptly. In an emergency, airbags and seatbelt pretensioners may not be triggered.

Which vehicles is the 77960-TF0-U632-M3 fitted in?

The 77960-TF0-U632-M3 is fitted in these vehicles: Honda Jazz GE (2008-2015).

The following overview lists the vehicles for this part number:

• Honda Jazz GE (2008-2015)

Two things are important before removal. Comparing the part number on the label of the unit with this page only confirms that it is the right unit. Whether the control unit itself is defective, or whether a plug or cable is causing the fault, is shown only by reading out the fault memory. Please have this done in advance.

For the same vehicles, we also repair control units with the part numbers 5WK43461, 77960-SAA-G821-M1, 77960-SEG-G821-M1, 77960-TF0-G820-M3, 77960-TF0-G821.

How does the repair of the 77960-TF0-U632-M3 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit. Create the repair order online and send the unit in well packed. Testing, repair and function testing at Airbag24 usually take 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. Afterwards, stored crash data is erased and a function test is carried out before your own unit is returned to you.

The order of steps serves safety: the battery is disconnected before removal, not afterwards.

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-TF0-U632-M3 get to Airbag24?

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

The printed repair order goes in the parcel. Pack the control unit shock-proof so that it survives transport undamaged.