Airbag control unit with part number 77960-SLE-H020-M3

What does the airbag control unit 77960-SLE-H020-M3 do?

As a central unit, the airbag control unit 77960-SLE-H020-M3 controls the restraint system (SRS) of Honda. It reads the signals from the crash sensors, decides within milliseconds in an impact whether airbags and seatbelt pretensioners are triggered, and monitors the entire system. If it detects a fault, it reports it via the airbag warning light.

Evaluation runs continuously, and each piece of sensor information is constantly compared with the others. So that seatbelt pretensioners and airbags react correctly in an emergency, the unit has to process every piece of information in a fraction of a second.

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

Why does the control unit 77960-SLE-H020-M3 fail?

The most common cause is stored crash data from an accident, even if no airbag has been triggered; a normal diagnostic tool cannot remove it. Other causes include aged components, cold solder joints, moisture and corrosion, and voltage spikes.

The other causes concern the electronics themselves: aged components lose reliability over the years, and solder joints can go cold. Moisture and corrosion attack the plug connections. Voltage spikes arise, for example, from a weak battery or a jump start.

Which of these causes actually applies can only be determined by examining the removed unit.

How can you tell that the 77960-SLE-H020-M3 is defective?

A defect in control unit 77960-SLE-H020-M3 shows up as the airbag warning light in the instrument cluster, when it stays on permanently or intermittently. Also possible are fault messages in the instrument cluster, a diagnostic tool without connection, and a fault memory that cannot be cleared.

These signs are typical:

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory remains

In an emergency, airbags and seatbelt pretensioners may not deploy if the system is disrupted. The warning light therefore requires clarification without delay.

Which vehicles is the 77960-SLE-H020-M3 fitted in?

The control unit 77960-SLE-H020-M3 is fitted in these vehicles: Honda Odyssey 4th generation (2008-2013). The part number of the unit is decisive here.

The overview shows the assigned vehicles:

• Honda Odyssey 4th generation (2008-2013)

Compare the part number on the label of the removed unit with this page; in this way you establish that you have the right unit in front of you. Also have the fault memory read out before removal. 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-SHJ-A013-M1, 77960-SHJA020M1, 77960-SHJC-012-M1, 77960-TK8-A011-M1.

How does the repair of the 77960-SLE-H020-M3 work?

The process begins with reading out the fault memory of 77960-SLE-H020-M3 and enclosing the log. Then disconnect the battery, remove the control unit and create a repair order online; afterwards send it off well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components and carries out a function test. Stored crash data is erased during this repair. Afterwards you receive your own, repaired unit 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-SLE-H020-M3 get to Airbag24?

You ship the unit as a parcel to Airbag24, or have it collected by UPS for an extra charge. Airbag24 then sends the repaired unit back to you by UPS.

Enclose the printed repair order and make sure the control unit 77960-SLE-H020-M3 is packed shock-proof.