A seat belt pretensioner is a pyrotechnic device that uses a small explosive charge to instantly tighten the seat belt during a collision [6, 18]. The , or airbag computer, monitors this circuit’s electrical resistance. If the resistance falls outside the normal range (typically 1.1 to 3.9 ohms ), the SDM triggers B0022 and illuminates the airbag warning light [2, 18]. Common Symptoms
Because SRS systems contain explosive components, specialized diagnostic tools are required to test the circuit safely without accidental deployment [2, 6]. A seat belt pretensioner is a pyrotechnic device
In many cases, the computer will disable the entire airbag system as a precaution when this code is active [6, 7]. Typical Causes or airbag computer