Airbag control unit with part number 89170-08220

What does the airbag control unit 89170-08220 do?

The airbag control unit 89170-08220 controls the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, decides within fractions of a second in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit records faults in the fault memory and reports them via the airbag warning light. After an accident the unit stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 89170-08220 fail?

Stored crash data is the most common cause, after an accident, even if no airbag has deployed. Further causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes that stress the 89170-08220.

A normal diagnostic tool cannot erase this crash data. Airbag24 removes it during the repair.

Electronics age, and solder joints can go cold. Moisture attacks plug connections. A weak battery or jump-starting creates voltage spikes that stress the electronics.

How can you tell that the 89170-08220 is defective?

A defect on the 89170-08220 shows up as the airbag warning light, fault messages in the instrument cluster, a diagnostic tool without connection to the control unit and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

• The airbag warning light lights up permanently or intermittently.
• A fault message appears in the instrument cluster.
• The diagnostic tool cannot establish a connection to the control unit.
• The fault memory cannot be cleared.

The light shows the fault as soon as it occurs. Have the system checked promptly rather than ignoring the indication.

Which vehicles is the 89170-08220 fitted in?

The control unit 89170-08220 is fitted in these vehicles: Toyota Sienna XL30 (2010-2020).

The following lists the vehicles we know of for this part number.

• Toyota Sienna XL30 (2010-2020)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit.

Also have the fault memory read out beforehand. 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 89170-08040, 89170-08130, 89170-08140, 89170-08170, 89170-08230.

How does the repair of the 89170-08220 work?

First you read out the fault memory and enclose the log. Then you disconnect the battery and only afterwards remove the control unit. Next you create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the unit on the test bench, replaces defective components and erases the crash data. A function test follows, after which your own unit is returned 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 89170-08220 get to Airbag24?

You send the control unit 89170-08220 as a parcel or book a UPS collection for an extra charge. After the repair it comes back to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.