Toyota Verso E120 airbag control unit repair

What is a Toyota Verso E120 airbag control unit?

In the Toyota Verso E120, the airbag control unit is the central control unit of the restraint system (SRS). It evaluates what the crash sensors report and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners deploy. At the same time, it continuously monitors the whole system.

This control unit is fitted in the Toyota Verso E120 (2001 to 2004). The control unit is made by Fujitsu Ten.

If the SRS control unit detects an irregularity during operation, it indicates this via the airbag warning light in the instrument cluster. If an accident occurs, it stores the crash data and locks itself.

At Airbag24, the repair is carried out by mail-in: you remove the control unit, create a repair order online and send it to us. We repair exactly the unit you sent in and then send it back to you.

Why is the Toyota Verso E120 airbag control unit defective?

Most often the cause is crash data that an accident has left in the unit's memory, even if no airbag deployed. Ageing components, cold solder joints, corrosion from moisture at the connectors and voltage spikes are also possible triggers.

An ordinary diagnostic tool cannot remove stored crash data. That is why the airbag system stays out of operation, even if no damage is visible on the outside of the vehicle.

Other failures have to do with time and the vehicle's electrical system. Electronic components wear out, solder joints lose contact, and moisture attacks the connector contacts. A weak battery or a jump start can also produce voltage spikes that damage the electronics.

This is indicated when the airbag warning light stays on permanently, the fault memory cannot be reset, or the diagnostic tool cannot establish contact with the control unit.

Common error codes for Toyota Verso E120 airbag control unit repair

An error code in the Toyota Verso E120 points to a specific part of the restraint system: the data connection to the control unit, its internal electronics, a squib circuit or the detection of occupants. The code shows which area is affected.

Each code assigns the fault to a part of the system. The following codes are known for the Toyota Verso E120:

• B1000 → Internal fault in the airbag control unit
• B1100 → Internal fault in the airbag sensor unit
• U0151 → Communication with the airbag control unit lost
• B1800 → Fault in the driver airbag squib circuit
• B1805 → Fault in the front passenger airbag squib circuit
• B1650 → Occupant classification fault

For diagnosis, you read out the fault memory with a diagnostic tool. Please note: a single code does not yet prove a defect in the control unit, as connectors, wiring or an airbag module can just as well be to blame. Whether the unit itself is affected only becomes clear during testing.

What part numbers are available for the Toyota Verso E120 airbag control unit repair?

You will find the part number on the label of the control unit; it defines its exact version. Depending on equipment and year of manufacture, different numbers are in circulation within the Toyota Verso E120 model range.

Known numbers for this vehicle are listed here, but the list makes no claim to completeness.

• 89170-13040 (Fujitsu Ten)
• 89170-13060 (Fujitsu Ten)

Compare the number on your unit with this list. This only tells you whether you are holding the matching unit. Whether it is actually defective is established by reading out the fault memory and by testing.

The way to the repair looks like this: first have the fault memory read out, then disconnect the battery and remove the control unit. After that, you create the repair order online and send the unit to us. Checking, repairing and testing at Airbag24 usually take 3–4 working days.

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.