Airbag control unit with part number P8635A244

What does the airbag control unit P8635A244 do?

The airbag control unit P8635A244 controls the SRS in Mitsubishi. It reads the impact sensors, calculates within milliseconds which airbags and seatbelt pretensioners fire, and checks the system continuously. After an accident, it stores crash data and locks itself.

During operation it continuously evaluates the sensor signals. As soon as it detects a malfunction in the system, it alerts the driver via the airbag warning light.

Crash data is created regardless of whether a deployment took place. The unit retains it until it is removed during a repair.

Why does the control unit P8635A244 fail?

The most common cause lies in the crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it on the P8635A244. Aged components, poor solder joints, moisture at plug connections and voltage spikes are also possible causes.

Crash data are stored measurements from the accident that can be removed during a repair. They are not a sign of a defect in the unit itself, but a recorded event.

Further causes are:

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

How can you tell that the P8635A244 is defective?

Typical warning signs on the P8635A244 are the airbag warning light in the instrument cluster, which lights up constantly or intermittently, a fault message in the instrument cluster, a diagnostic tool that finds no connection to the control unit, and a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy.

These signs occur individually or together:

• airbag warning light lights up constantly or intermittently
• fault message in the instrument cluster
• diagnostic tool does not find the control unit
• fault memory cannot be cleared

If a warning signal appears, have it clarified promptly.

Which vehicles is the P8635A244 fitted in?

The P8635A244 is fitted in these vehicles: Mitsubishi Lancer CY (2007-2017).

These models are on record for this unit:

• Mitsubishi Lancer CY (2007-2017)

Comparing the part number on the label of the removed unit with this page only shows that you have the correct unit. It says nothing about whether the unit is defective. So have the fault memory read out beforehand, because the log shows whether the control unit or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers P8635A146, P8635A168, TARME1308R0924, TARME2937R0152.

How does the repair of the P8635A244 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the P8635A244. Next, create a repair order online and send the unit in well packed. Airbag24 needs 3–4 working days as a rule for testing, repair and function check.

The order protects during work on the unit. The control unit is removed only after the readout and after the battery has been disconnected.

Airbag24 examines the unit on the test bench and replaces defective components. The stored crash data is erased, and then a function test follows. The unit of your own is then returned. 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 P8635A244 get to Airbag24?

You send the P8635A244 to Airbag24 as a parcel, or you book UPS collection for an extra charge. After the repair, the unit is sent back to you by UPS.

Enclose the printed repair order with the parcel, and pack the unit shockproof.