Code Definition

B0108 (52) — Passenger first step airbag squib Circuit shorted to power

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

About B0108

B0108 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 B0108 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) 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 B0108 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 B0108:52 is a Toyota body code that sets when the airbag sensor assembly, also called the SRS ECU, detects a short to power in the passenger first stage airbag squib circuit. The squib is the electrically fired igniter that deploys the passenger front airbag first stage, and the SRS ECU monitors the firing loop for correct resistance and for any unintended connection to battery voltage. This code stores when part of the squib circuit picks up power from another circuit, commonly through a chafed harness, contamination in a connector, or wiring damaged during dash or accessory work. When B0...

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