Airbag control unit with part number 89170-0C010

What does the airbag control unit 89170-0C010 do?

The airbag control unit 89170-0C010 controls the SRS system of Toyota. It detects an impact via the crash sensors, determines within fractions of a second which airbags and seatbelt pretensioners are triggered, and checks all components of the system. After a crash it stores crash data and locks itself.

In operation, the control unit sits between the sensors and the triggers. It reports irregularities via the airbag warning light so that the cause can be recognised early, and it keeps the connections to all components under continuous watch.

Why does the control unit 89170-0C010 fail?

The most common cause is crash data from an earlier accident, even if no airbag has deployed; a standard diagnostic tool cannot erase them. Airbag24 erases them during the repair. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, or voltage spikes such as those from a weak battery or a jump start can also lead to failure.

Crash data alone say nothing about the condition of the electronics. Components age like all electronic assemblies, and solder joints can go cold over time. Moisture attacks plug connections, which leads to contact problems that are initially hard to pin down.

How can you tell that the 89170-0C010 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared.

An intermittent light is as much a sign as a permanent one. Intermittent lighting is a reason to have the car checked promptly.

As long as the fault persists, airbags and seatbelt pretensioners may fail to deploy in an emergency, so a prompt check is advisable.

Which vehicles is the 89170-0C010 fitted in?

The control unit 89170-0C010 is fitted in these vehicles: Toyota Tundra K20 (2000-2006).

The following overview shows the vehicles given for this number.

• Toyota Tundra K20 (2000-2006)

Compare the part number on the label of the removed unit with this page; this only confirms that you have the correct unit. Have the fault memory read out beforehand, because the result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-0C050, 89170-0C060.

How does the repair of the 89170-0C010 work?

First you have the fault memory read out and enclose the log, then you disconnect the battery and only then remove the control unit; afterwards you create a repair order online and send in the well-packed unit. At Airbag24 the unit is checked on the test bench, defective components are repaired, crash data are erased and a function test is carried out; processing usually takes 3–4 working days.

The order of these steps is for your safety during removal and must be kept. The log helps to trace the finding during the inspection.

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 89170-0C010 get to Airbag24?

You send in the unit as a parcel or book a UPS collection for an extra charge; after the repair, Airbag24 returns it by UPS. Put the printed repair order into the parcel and pack the control unit shock-proof.

A sturdy box with enough padding protects the electronics on the way.