Airbag control unit with part number 77960-T5A-E020-M1

What does the airbag control unit 77960-T5A-E020-M1 do?

The airbag control unit 77960-T5A-E020-M1 controls the restraint system (SRS) in Honda vehicles. It evaluates the crash sensors, decides in an impact within milliseconds about airbags and seatbelt pretensioners, and monitors the system continuously. It reports faults via the airbag warning light.

The measured values from the sensors arrive in the unit continuously, and it compares them with fixed criteria.

After an accident, it secures crash data and locks itself afterwards.

Why does the control unit 77960-T5A-E020-M1 fail?

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

Other causes at a glance:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

Crash data remains in the unit after an accident, regardless of whether an airbag fired. A standard diagnostic tool cannot remove it; Airbag24 erases it during the repair. Which of the causes applies is only shown by the fault memory.

How can you tell that the 77960-T5A-E020-M1 is defective?

A typical sign is an airbag warning light that either stays on constantly or lights up only now and then. Messages in the instrument cluster or a diagnostic tool without a connection to the control unit are also signs. Then airbags and seatbelt pretensioners may not trigger in an emergency.

These signs occur individually or together:

• airbag warning light stays on constantly or only intermittently
• fault message in the instrument cluster
• diagnostic tool receives no connection to the control unit
• fault memory remains after the attempt to clear it

Do not wait with the check; have the fault read out in a workshop promptly.

Which vehicles is the 77960-T5A-E020-M1 fitted in?

The control unit 77960-T5A-E020-M1 is fitted in these vehicles: Honda Jazz GK (2013-2023). Use this information to check whether your vehicle is one of them.

The known vehicles are listed below.

• Honda Jazz GK (2013-2023)

On the one hand, compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. On the other hand, have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or 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-E020-M1 work?

For 77960-T5A-E020-M1, first read out the fault memory and attach the log. Then disconnect the battery, remove the control unit and create the repair order online. Airbag24 processes the unit usually within 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test.

This time refers solely to checking, repairing and testing. 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-E020-M1 get to Airbag24?

You send the control unit 77960-T5A-E020-M1 as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair, the unit comes back to you by UPS.

Enclose the printed repair order and pack the control unit shock-resistant.