Airbag control unit with part number 89170-60240

What does the airbag control unit 89170-60240 do?

The airbag control unit 89170-60240 is the control unit of the restraint system (SRS) for Lexus. In an accident it evaluates the signals of the crash sensors, decides on triggering airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The unit reports faults via the airbag warning light. In the background it checks sensors, lines and its own electronics so that a fault is noticed early.

Monitoring therefore runs continuously in the background, without you noticing anything.

Why does the control unit 89170-60240 fail?

The most common cause is stored crash data after an accident, even if no airbag has triggered; a normal diagnostic tool cannot delete it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Other causes in detail:

• ageing electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or jump-starting

Crash data remain in the unit after an impact, even if no airbag was triggered. The other causes tend to develop gradually.

How can you tell that the 89170-60240 is defective?

The airbag warning light stays on permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

The typical signs at a glance:

• Airbag warning light permanently or intermittently on
• Error message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be cleared

The warning light must not be ignored, because it indicates the fault as soon as the system detects it.

Which vehicles is the 89170-60240 fitted in?

The control unit 89170-60240 is fitted in these vehicles: Lexus GX J120 (2003-2009).

The following vehicles are assigned to the part number:

• Lexus GX J120 (2003-2009)

Compare the part number on the label of the removed unit with this page. That only ensures that you have the right unit in front of you. Also have the fault memory read out beforehand, because only that shows whether the control unit is defective or a plug or cable is the cause.

How does the repair of the 89170-60240 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the unit well-packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Then you get your unit back.

Processing at Airbag24 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 89170-60240 get to Airbag24?

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

Put the printed repair order in the parcel and pack the control unit shock-proof.