Airbag control unit with part number 77960-T5A-J850-M1

What does the airbag control unit 77960-T5A-J850-M1 do?

The unit 77960-T5A-J850-M1 controls the restraint system (SRS) in Honda vehicles. It processes the measurements from the crash sensors and, in an impact, triggers the appropriate airbags and seatbelt pretensioners within a few milliseconds.

During operation, the control unit checks continuously whether all connected components are working. If it finds a fault, it stores it and displays it via the airbag warning light.

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

Why does the control unit 77960-T5A-J850-M1 fail?

With the 77960-T5A-J850-M1, the cause is most often crash data stored after an accident, even if no airbag was triggered. Ageing components, moisture on the plugs and voltage spikes from the vehicle electrical system are further possible causes.

This crash data cannot be erased with a standard diagnostic tool. Airbag24 removes it during the repair.

Ageing components inside the electronics can cause the failure, as can dry solder joints on the circuit board. Moisture and corrosion at plug connections also count, because they gradually worsen the contact.

Voltage spikes, for example from a weak battery or an improper jump start, place additional strain on the components. Only the inspection of the unit shows which of these causes applies.

How can you tell that the 77960-T5A-J850-M1 is defective?

A defect in the 77960-T5A-J850-M1 shows up as a fault message in the instrument cluster. Additional signs are an airbag warning light that stays on permanently or intermittently, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be cleared.

If the system is faulty, the airbags and seatbelt pretensioners may not deploy in an emergency. The warning light is therefore a serious indication.

The light shows the fault so that it does not remain hidden. One of the messages mentioned is a reason not to postpone the check. Only reading out the fault memory helps here.

Which vehicles is the 77960-T5A-J850-M1 fitted in?

The control unit 77960-T5A-J850-M1 is fitted in these vehicles: Honda Jazz GK (2013-2023). If your car appears in this list, the unit is recorded for this model.

The list below names the models to which we have assigned this control unit.

• Honda Jazz GK (2013-2023)

Check the part number on the label of the removed unit against this page. The comparison only confirms that it is the correct unit.

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

For the same vehicles, we also repair control units with the part numbers 77960-SAA-F911-M1, 77960-SAA-G821-M1.

How does the repair of the 77960-T5A-J850-M1 work?

First read out the fault memory and enclose the log, then disconnect the battery and only then remove the control unit 77960-T5A-J850-M1. Next, create a repair order online and send the unit in well packed. Processing at Airbag24 takes 3–4 working days as a rule.

The sequence is mandatory for safety reasons. It begins with reading out the memory and ends only when the unit is securely packed.

At Airbag24, the unit is first examined on the test bench. Defective components are replaced, the stored crash data is erased and a functional test is carried out before your own unit is returned 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-T5A-J850-M1 get to Airbag24?

You send the control unit 77960-T5A-J850-M1 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 brings the unit back to you by UPS.

Put the printed repair order in the parcel and pack the control unit shockproof.