Airbag control unit with part number 77960-TNY-J220-M4

What does the airbag control unit 77960-TNY-J220-M4 do?

At Honda, the airbag control unit 77960-TNY-J220-M4 controls the restraint system (SRS). It evaluates the signals from the crash sensors, determines in an accident the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. If it detects a fault, the airbag warning light lights up.

Monitoring covers the sensors, the wiring and the output stages, and runs without interruption.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 77960-TNY-J220-M4 fail?

The most common cause: stored crash data after an accident, even without a triggered airbag. In addition come aged components, cold solder joints, moisture and corrosion, and voltage spikes; a standard diagnostic tool cannot erase the crash data.

In detail, these influences take effect:

• Stored crash data that cannot be erased with a standard diagnostic tool
• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from jump-starting

How can you tell that the 77960-TNY-J220-M4 is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which stays lit permanently or intermittently, through an error message, through a diagnostic tool without connection, and through a fault memory that cannot be erased.

Typical signs at a glance:

• Warning light in the instrument cluster stays lit
• Error message is displayed
• Diagnostic tool finds no control unit
• Fault memory is retained

In an emergency, airbags and seatbelt pretensioners may not be able to deploy. Please take the warning seriously.

Which vehicles is the 77960-TNY-J220-M4 fitted in?

The airbag control unit 77960-TNY-J220-M4 is fitted at Honda in these vehicles: Honda CR-V 5 (2018-2023). The assignment is based on our data.

The list at a glance:

• Honda CR-V 5 (2018-2023)

Comparing the part number on the label of the removed device with this page only ensures that you removed the right device. Only the fault memory shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 77960-TLA-A240-M4, 77960-TLA-A250-M4, 77960-TLA-A310-M4, 77960-TLA-A320-M4, 77960-TLA-A410-M4, 77960-TLA-A420-M4.

How does the repair of the 77960-TNY-J220-M4 work?

You have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit and create a repair order online. Next, send in the packed device.

Airbag24 checks the device on the test bench, replaces defective components, erases stored crash data and carries out a function test.

For the check, the repair and the function test, Airbag24 usually expects 3–4 working days. Afterwards, you receive your device back. 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-TNY-J220-M4 get to Airbag24?

You send the control unit as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

Pack the device shock-proof and enclose the printed repair order.