Airbag control unit with part number 89170-04010

What does the airbag control unit 89170-04010 do?

The 89170-04010 coordinates the restraint system (SRS) of Toyota. It continuously evaluates the sensor data, calculates the triggering of the airbags and seatbelt pretensioners in an accident within milliseconds, and shows faults via the airbag warning light. After an accident it stores crash data and locks itself.

In an accident the decision has to be made in the shortest possible time, so the control unit works constantly with the measured values.

The sensors, the cable routes and the control unit together form the restraint system. If one part fails, the entire function may be restricted.

Why does the control unit 89170-04010 fail?

The most common cause with 89170-04010 is stored crash data after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. In addition, aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are possible causes.

The other causes in brief:

• aged components of the electronics
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example with a weak battery or jump-starting

The crash data remains the most common reason because it stays in the memory.

How can you tell that the 89170-04010 is defective?

A defect in the 89170-04010 shows itself first through the airbag warning light in the instrument cluster, which lights up permanently or only intermittently. In addition, a fault message appears, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be erased. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

These signs are easy to observe in daily driving, because the instrument cluster shows them directly. A message of this kind is a clear signal that the vehicle should be examined promptly.

Anyone who ignores the warning accepts that the system may not work as intended in an emergency.

Which vehicles is the 89170-04010 fitted in?

This control unit 89170-04010 is fitted in the following vehicles: Toyota Tacoma N150 (1995-2004). Only the part number counts, not the vehicle name.

The list of vehicles held for this part number follows directly below.

• Toyota Tacoma N150 (1995-2004)

Hold the number on the label of the removed device next to this page; this only shows that it is the correct device. Also have the fault memory read out beforehand, because only this result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-04080, 89170-04120.

How does the repair of the 89170-04010 work?

You have the fault memory read out, and the log goes into the parcel. Then you disconnect the battery and only afterwards remove the control unit 89170-04010. Next, create a repair order online and send the device in well packed. Processing at Airbag24 usually takes 3–4 working days.

This sequence is binding for safety reasons.

At Airbag24 the device is checked on the test bench, defective components are repaired, stored crash data is erased and a function test is carried out. Afterwards you receive your own, repaired device back. 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 89170-04010 get to Airbag24?

The 89170-04010 reaches Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, it is sent back to you by UPS.

Put the printed repair order into the parcel, and pack the device so that it can withstand transport shock-proof.