Code Definition

B0106 (54) — Passenger first step airbag squib Circuit open

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

About B0106

B0106 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 B0106 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

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 B0106 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 B0106:54 is a Toyota body code that sets when the SRS ECU, also called the airbag sensor assembly, detects an open circuit or excessive resistance in the passenger first stage airbag squib circuit. The squib is the electrically fired igniter inside the passenger airbag module, and the SRS ECU constantly measures the resistance of this firing loop so it can deploy the airbag in a frontal crash. This code stores when the measured resistance rises above the allowed threshold, which usually points to a disconnected airbag connector, a broken or corroded wire, or spread connector terminals rath...

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