Airbag control unit with part number 77960-T5C-J840-M1

What does the airbag control unit 77960-T5C-J840-M1 do?

The airbag control unit 77960-T5C-J840-M1 is the central control of the SRS restraint system of Honda. It recognises a crash from the sensor signals, determines within milliseconds which airbags and seatbelt pretensioners fire, and reports faults via the airbag warning light.

In addition, it monitors the entire system in the background. After an accident it stores crash data and locks itself.

Why does the control unit 77960-T5C-J840-M1 fail?

The most common cause: crash data stored after an accident, even without an airbag being triggered. Other causes are aged components, cold solder joints, moisture and corrosion on connectors, and voltage peaks.

Crash data cannot be erased with a normal diagnostic tool, so it must be considered during the fault search.

Besides the crash data, ageing and moisture also affect the unit. Aged components and cold solder joints can impair its function. Voltage peaks, for example from a weak battery or a jump start, put additional strain on the unit.

How can you tell that the 77960-T5C-J840-M1 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

The light shows the defect as soon as it comes on. Even if it only lights up now and then, an inspection is worthwhile.

Which vehicles is the 77960-T5C-J840-M1 fitted in?

Checking the list before shipping gives clarity. The airbag control unit 77960-T5C-J840-M1 is fitted in these vehicles: Honda Jazz GK (2013-2023).

These vehicles are recorded for this part number:

• Honda Jazz GK (2013-2023)

Compare the part number on the label of the removed unit with this page, and then you know for certain that it is the right unit. The fault memory, however, shows whether the control unit is defective or whether a connector or cable is the cause. Therefore have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 77960-T5A-A212-M1, 77960-T5A-E010-M1, 77960-T5A-E011-M1, 77960-T5A-E020-M1, 77960-T5A-F010-M1, 77960-T5A-F011-M1.

How does the repair of the 77960-T5C-J840-M1 work?

First have the fault memory read out and enclose the log, then disconnect the battery. Only then remove the control unit, create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components and erases stored crash data. A function test follows before your own unit is sent 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-T5C-J840-M1 get to Airbag24?

The unit reaches Airbag24 as a parcel, or you arrange a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Enclose the printed repair order and pack the unit shock-proof.