Airbag control unit with part number 89170-30690

What does the airbag control unit 89170-30690 do?

The airbag control unit 89170-30690 coordinates the restraint system (SRS) in Lexus vehicles. It continuously checks the crash sensors, decides on airbags and seatbelt pretensioners in an accident, and reports faults via the airbag warning light.

The decision is made in a fraction of a second, because the impact is detected within milliseconds. The unit maintains a connection to the sensors and seatbelt pretensioners at all times.

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

Why does the control unit 89170-30690 fail?

The most common cause is that crash data was stored after an accident, even if no airbag has deployed. Other causes are ageing components, cold solder joints, moisture, corrosion and voltage spikes.

Crash data cannot be deleted with a standard diagnostic tool. The fault therefore remains in the unit.

A second group of causes concerns the electronics themselves. Components age over time, solder joints can go cold, and plug connections suffer from moisture and corrosion.

Voltage spikes, for example with a weak battery or jump-starting, can place additional strain on the electronics. Which cause applies in an individual case is only shown by the fault memory that has been read out.

How can you tell that the 89170-30690 is defective?

A defect shows up as the airbag warning light in the instrument cluster, as an error message in the instrument cluster, or as the diagnostic tool being unable to access the control unit. A fault memory that cannot be cleared is a further sign.

These signs are typical:

• airbag warning light, lit intermittently or permanently
• error message in the instrument cluster
• no connection between diagnostic tool and control unit
• fault memory that cannot be cleared

In the event of a defect, airbags and seatbelt pretensioners may not trigger in an emergency. For this reason, have the system checked promptly if you notice these signs.

Which vehicles is the 89170-30690 fitted in?

The control unit 89170-30690 is fitted in these vehicles: Lexus GS S190 Facelift (2009-2011) and S190 (2005-2009).

The recorded models are listed below.

• Lexus GS S190 Facelift (2009-2011)
• Lexus GS S190 (2005-2009)

Compare the part number on the label of the removed unit with this page. This only shows that you have the correct unit. Have the fault memory read out before removal, because only it shows whether the control unit itself is defective or whether a plug or cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 89170-30B30, 8917030630.

How does the repair of the 89170-30690 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit 89170-30690. Finally, create a repair order online and pack the unit well for dispatch.

At Airbag24 the unit is checked on the test bench, defective components are repaired, stored crash data is deleted, and a function test follows. Afterwards your own unit is returned to you.

Processing at Airbag24, meaning checking, repairing and testing, usually takes 3–4 working days.

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 89170-30690 get to Airbag24?

Either you send the control unit 89170-30690 as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends it back by UPS after the repair.

Put the printed repair order and shock-proof protection around the unit into the parcel.