Airbag control unit with part number 89170-04630

What does the airbag control unit 89170-04630 do?

The airbag control unit 89170-04630 controls the restraint system (SRS) of Toyota. It evaluates the signals from the crash sensors, decides on airbags and seatbelt pretensioners within milliseconds in a crash, and monitors the system continuously.

The unit reports detected faults via the airbag warning light in the instrument cluster. After a crash, it stores crash data and locks itself.

In normal operation it stays inconspicuous. In the background it checks the power supply, the sensors and the firing circuits, and a detected fault is recorded in the fault memory.

Why does the control unit 89170-04630 fail?

Stored crash data is the most common cause for the 89170-04630, even if no airbag has deployed; a standard diagnostic tool cannot erase it. Further causes are aging electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

The unit records the incident regardless of whether an airbag has deployed.

Electronics age, solder joints can go cold, and moisture disturbs the contacts. Voltage spikes put additional strain on the unit.

How can you tell that the 89170-04630 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears. A diagnostic tool then finds no connection to the control unit 89170-04630, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not deploy.

These signs indicate a defect:

• The airbag warning light stays on permanently.
• It lights up only intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool does not reach the control unit.
• The fault memory cannot be cleared.

Even a warning light that only lights up intermittently indicates a malfunction and must not be ignored.

Which vehicles is the 89170-04630 fitted in?

This information refers to the part number 89170-04630. The control unit 89170-04630 is fitted in these vehicles: Toyota Tacoma N200 (2004-2015).

The list contains the vehicles stored for this part number:

• Toyota Tacoma N200 (2004-2015)

First compare the part number on the label of the removed unit with this page. That only tells you that it is the right unit. Also have the fault memory read out in advance, because only this result shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-04420, 89170-04570, 89170-04600, 89170-04650.

How does the repair of the 89170-04630 work?

First have the fault memory of the 89170-04630 read out and enclose the log. Then disconnect the battery, and only after that remove the control unit. Next create the repair order online and send the well-packed unit in.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and runs a function test. Afterwards your own, repaired unit goes back to you.

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 89170-04630 get to Airbag24?

You send the unit as a parcel to Airbag24, or UPS collects it for an extra charge. After the repair, Airbag24 sends the 89170-04630 back to you by UPS.

Enclose the printed repair order in the parcel and pack the control unit shockproof.