Airbag control unit with part number 77960-T0A-3070-M4

What does the airbag control unit 77960-T0A-3070-M4 do?

The control unit 77960-T0A-3070-M4 is the central control unit of the restraint system (SRS) in the Honda vehicle. It evaluates the crash sensors, decides on airbags and seatbelt pretensioners in a crash, and monitors the system continuously. After an accident it stores crash data and locks itself.

Triggering takes place within fractions of a second once the sensors have reported an impact.

Faults are indicated by the unit via the airbag warning light in the instrument cluster.

Why does the control unit 77960-T0A-3070-M4 fail?

The most common cause with the 77960-T0A-3070-M4 is crash data stored in the control unit after an accident, even if no airbag has been triggered; a normal diagnostic tool does not erase it. Other causes are ageing components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

Crash data is a record that the unit creates itself. It remains in the unit, so the fault persists even if you read out the fault memory.

The other causes lie in the electronics and their connections. Corrosion and damp disturb the contacts, ageing weakens components, and voltage spikes stress the circuitry when the battery is weak.

How can you tell that the 77960-T0A-3070-M4 is defective?

A defect on the 77960-T0A-3070-M4 shows up as an airbag warning light that is on constantly or intermittently, a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

• Airbag warning light is on constantly or intermittently
• Fault message in the instrument cluster
• No connection between the diagnostic tool and the control unit
• Fault memory cannot be cleared

With such signs, airbags and seatbelt pretensioners may fail to trigger in an emergency.

Which vehicles is the 77960-T0A-3070-M4 fitted in?

The airbag control unit 77960-T0A-3070-M4 is fitted in these vehicles: Honda CR-V 4 RM (2012-2018).

The vehicles individually:

• Honda CR-V 4 RM (2012-2018)

Compare the part number on the label of the removed unit with this page. That way you can be sure you have the right control unit. Have the fault memory read out beforehand, because it 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 5WK43782, 77960-SWA-G212-M4, 77960-SWA-G214-M4, 77960-T1G-G920-M4.

How does the repair of the 77960-T0A-3070-M4 work?

First have the fault memory read out and enclose the log with the unit. Then disconnect the battery and only then remove the control unit. Next create a repair order online and send the unit in well packed. At Airbag24, checking, repairing and testing usually take 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. Then the crash data is erased, a function test follows, and your own unit goes 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-T0A-3070-M4 get to Airbag24?

You send the control unit 77960-T0A-3070-M4 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 unit shockproof.