Code Definition

B1180 — Short in Driver’s Squib (2nd Step) Circuit

System: Body  |  Type: Manufacturer-Specific  |  Make: Toyota

About B1180

B1180 is a manufacturer-specific 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 B1180 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.

B1180 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The centre airbag sensor assembly (SRS ECU) continuously monitors the driver airbag two stage inflator 2nd step firing loop, commonly labelled D2 in Toyota wiring diagrams. DTC B1180 is stored when the ECU detects circuit resistance below the specified squib range, indicating a short to battery positive, a short to ground, or a short between the positive and negative sides of the D2 squib pair during the self check after IG ON and during continuous monitoring. Toyota SRS systems continuously verify squib loop integrity by passing a small safe test current through each stage of the airbag infla...

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