Airbag control unit with part number 8635A088

What does the airbag control unit 8635A088 do?

The airbag control unit 8635A088 evaluates the signals from the crash sensors at Mitsubishi. In a real emergency, within milliseconds, it decides which airbags and seatbelt pretensioners fire, and it monitors the restraint system (SRS) continuously. After an accident, it stores crash data and locks itself.

The control unit is inconspicuous in everyday driving. Only a detected fault brings it into view via the airbag warning light.

Why does the control unit 8635A088 fail?

The most common cause for the 8635A088 is crash data from an earlier accident, even if no airbag fired. A normal diagnostic tool cannot erase this data. Further causes are ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be seen on the unit; it only becomes visible during a targeted readout. That is why this point comes first in every analysis.

The remaining causes are linked to age and environmental influences. A weak battery or jump-starting can also stress the electronics through voltage spikes.

How can you tell that the 8635A088 is defective?

A defect in the 8635A088 shows through the airbag warning light in the instrument cluster, which lights up either constantly or only now and then. Error messages, a missing connection to the diagnostic tool and a fault memory that cannot be reset are also signs. In a real emergency, airbags and seatbelt pretensioners may then fail to deploy.

The signs at a glance:

• Airbag warning light that lights up constantly or occasionally
• Message in the instrument cluster about a fault
• Diagnostic tool without connection to the control unit
• Fault memory that cannot be reset

A single one of these signs is already enough to have the matter checked. The warning light reports the fault directly, without waiting for a workshop inspection.

Which vehicles is the 8635A088 fitted in?

The 8635A088 is fitted in several vehicles at Mitsubishi. It is installed in these vehicles: Mitsubishi Pajero V80 (2007-2012), V90 (2007-2012), V80 Facelift (2012-2021) and V90 Facelift (2012-2021).

The following list shows the vehicles we have on file for this part number.

• Mitsubishi Pajero V80 (2007-2012)
• Mitsubishi Pajero V90 (2007-2012)
• Mitsubishi Pajero V80 Facelift (2012-2021)
• Mitsubishi Pajero V90 Facelift (2012-2021)

Compare the part number on the label of the removed unit with this page; that only clarifies whether the right unit is present. Also have the fault memory read out in advance, because only that 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 153000313, 3SR791, 5757A026, 7407A095, 7420A082, 8635A093.

How does the repair of the 8635A088 work?

At the start is the readout of the fault memory at the 8635A088, whose log is enclosed with the unit. In the next step, you disconnect the battery and remove the control unit. Afterwards, you create the repair order online and send off the well-packed unit.

On the test bench, Airbag24 examines the control unit. Defective components are then repaired, crash data deleted and the functional test run.

Processing usually takes 3–4 working days, and this applies only to the work at Airbag24. Afterwards you receive your own 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 8635A088 get to Airbag24?

You send the 8635A088 yourself as a parcel, or you have it collected by UPS for an additional charge. Airbag24 handles the return shipment after the repair via UPS.

Place the printed repair order in the parcel and pack the control unit shock-proof.