Nissan Almera Tino V10 airbag control unit repair

What is a Nissan Almera Tino V10 airbag control unit?

In a crash, the Nissan Almera Tino V10 airbag control unit decides within milliseconds which airbags and seatbelt pretensioners fire. It is the central control unit of the restraint system (SRS) and evaluates the signals from the crash sensors for this purpose.

During normal driving, the unit continuously monitors the entire system. If it detects a fault, it indicates this via the airbag warning light in the instrument cluster. After a collision it stores crash data and locks itself.

The control unit is installed in the Nissan Almera Tino V10 (2000 to 2006). It was manufactured by Bosch.

Why is the Nissan Almera Tino V10 airbag control unit defective?

Most often the cause is crash data stored during an accident, even if no airbag fired. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion on connectors, or voltage spikes.

A standard diagnostic tool cannot remove stored crash data. Voltage spikes can occur, for example, with a weak battery or after a jump start. If moisture reaches the connectors, signal transmission suffers; over the years the components on the circuit board also age.

These signs point to a problem: the airbag warning light stays on continuously, entries in the fault memory remain despite attempts to clear them, or the diagnostic tool cannot establish a connection to the control unit.

Common error codes for Nissan Almera Tino V10 airbag control unit repair

For the Nissan Almera Tino V10 airbag control unit, the codes point to different types of fault: communication faults, internal faults of the unit and crash data stored after an impact. Reading them out with a diagnostic tool shows which of these apply in your case.

The following codes are known for this vehicle:

• 71 → Internal fault in the control unit
• B1100 → General fault of the airbag control unit
• B1209 → Frontal collision detected, crash data stored
• B1210 → Side collision detected, crash data stored
• U1000 → Fault in the CAN communication line
• U1010 → Fault in CAN communication with the control unit

Error codes are read out with a diagnostic tool. A single code does not necessarily mean that the control unit is defective, as connectors, wiring or an airbag module can also be the cause. Only an inspection provides clarity.

Therefore note down all codes that were read out and send the diagnostic report in with the unit. This way the inspectors at Airbag24 can see right away which messages were present and can look for the cause in a targeted way.

What part numbers are available for the Nissan Almera Tino V10 airbag control unit repair?

You will find the part number on the label of your Nissan Almera Tino V10 airbag control unit. It determines the exact version, as within a model series there are different numbers depending on equipment and year of manufacture.

These numbers are known for this vehicle; the list need not be complete:

• 98820 4U400 (Bosch)
• 98820 BU900 (Bosch)

Compare the number on the label of your unit with this list. This only ensures that you are holding the right unit. Whether there is a defect only becomes clear from reading out the fault memory or from the inspection at Airbag24.

Airbag24 works on a send-in basis: your own control unit is repaired and returned to you.

Here is how to proceed: first have the fault memory read out, then disconnect the battery and remove the control unit. Next, create the repair order online and send in the unit. Inspection, repair 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.