Airbag control unit with part number 89170-42240

What does the airbag control unit 89170-42240 do?

The airbag control unit 89170-42240 is the central control unit of the restraint system (SRS) of Toyota. It evaluates the crash sensors, decides within milliseconds in an impact whether airbags and seatbelt pretensioners are fired, and monitors the entire system. It reports faults via the airbag warning light.

Monitoring runs in the background while the ignition is switched on. During this, the unit checks sensors, wiring and firing circuits.

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

Why does the control unit 89170-42240 fail?

With the 89170-42240, stored crash data is the most common cause, even if no airbag was triggered. Ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are further causes.

Crash data cannot be erased with a standard diagnostic tool. Airbag24 removes it during the repair.

Electronic components age, and solder joints can develop cracks over time. Contact with moisture or corrosion conducts signals less well.

Voltage spikes, for example from a weak battery or a jump start, additionally stress the circuit.

How can you tell that the 89170-42240 is defective?

A defect in the 89170-42240 shows up as the airbag warning light in the instrument cluster, as fault messages in the instrument cluster, or because the diagnostic tool cannot reach the control unit. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• The airbag warning light lights up permanently or intermittently
• A fault message appears in the instrument cluster
• The diagnostic tool finds no connection to the control unit
• The fault memory cannot be cleared

Have a warning light that stays on checked promptly.

Which vehicles is the 89170-42240 fitted in?

The control unit 89170-42240 is fitted in these vehicles: Toyota RAV4 XA30 (2006-2009) and XA30 Facelift (2009-2013).

The list shows the vehicles to which Airbag24 assigns this control unit.

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

Compare the part number on the label of the removed unit with this page. This only ensures that it is the right unit. Whether the control unit is defective or a plug or cable is the cause is shown only by the fault memory read out beforehand.

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 89170-42240 work?

For the 89170-42240, first have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit and create a repair order online. Next, send the unit in well packed. Testing, repairing and function-testing at Airbag24 usually take 3–4 working days.

Airbag24 tests the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. 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 89170-42240 get to Airbag24?

You send the 89170-42240 to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, the unit comes back to you by UPS.

The printed repair order goes into the parcel, and you pack the unit shockproof.