DTC 73/B0135: Short In Driver-Side Seat Belt PRETENSIONER Squib Circuit: Description
WARNING: This page is about a different car, the 2004 Toyota Matrix and 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
The driver-side seat belt pretensioner squib circuit consists of the air bag sensor assembly and driver-side seat belt pretensioner. The squib circuit causes the driver-side seat belt pretensioner to deploy when deployment conditions are satisfied.