Airbag control unit with part number 89170-42231

What does the airbag control unit 89170-42231 do?

The airbag control unit 89170-42231 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals of the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

If it detects a fault, it stores it in the fault memory and displays it via the airbag warning light in the instrument cluster. After an accident it additionally stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit 89170-42231 fail?

Crash data stored after an accident is the most common cause, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Airbag24 erases the crash data during the repair. Which of the other causes applies to your unit only the test will show.

How can you tell that the 89170-42231 is defective?

A defect in the 89170-42231 becomes apparent through the airbag warning light in the instrument cluster, through fault messages in the instrument cluster, through no connection to the diagnostic tool and through a fault memory that cannot be cleared.

• Airbag warning light lights up permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

With these signs, airbags and seatbelt pretensioners may possibly fail to deploy in an emergency. Therefore, do not leave these signs unattended; have them checked.

Which vehicles is the 89170-42231 fitted in?

The airbag control unit 89170-42231 is fitted in these vehicles: Toyota RAV4 XA30 (2006-2009) and XA30 Facelift (2009-2013).

Here are the vehicles assigned to this part number:

• Toyota RAV4 XA30 (2006-2009)
• Toyota RAV4 XA30 Facelift (2009-2013)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Also have the fault memory read out beforehand, because only that 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 150300-8850, 89170-0R022, 89170-0R140, 89170-42201, 89170-42210, 89170-42420.

How does the repair of the 89170-42231 work?

For your 89170-42231, first read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. Then you create a repair order online and send the well-packed unit in.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days and covers only checking, repairing and testing.

Afterwards your own unit goes back 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 89170-42231 get to Airbag24?

You send the control unit 89170-42231 to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Print out the repair order and put it into the parcel. Pack the unit shockproof.