Code Definition

B0100 (13) — Driver first step airbag squib Circuit

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Toyota

About B0100

B0100 is a generic (obd-ii standard) body diagnostic trouble code recorded for Toyota vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B0100 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B0100 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC B0100:13 is a Toyota body code indicating that the airbag control module (ACM) has detected an open circuit or excessively high resistance in the driver first stage airbag squib circuit. The squib is the electrically fired igniter that sets off the inflator, and the first stage is the primary charge in the driver (steering wheel) airbag that the ACM fires to begin deployment. The ACM continuously measures the resistance of this squib circuit through the clock spring, also called the spiral cable, so a disconnected airbag, a broken wire, corroded terminals, or a failed clock spring will pus...

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