Code Definition

B2585 — Anti Theft Input Signal Circuit Short To Battery

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

About B2585

B2585 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2585 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 B2585 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

The anti theft input signal circuit carries trigger inputs to the Body Control Module or anti theft control module from sensors such as hood ajar switches, door switches, glass break sensors, and aftermarket alarm inputs, allowing the system to detect tamper events and arm or disarm the alarm. DTC B2585 sets when the controlling module detects that the anti theft input signal circuit is shorted to battery voltage, with the input held high when it should be referenced low or floating. The diagnostic relies on a known idle voltage level on the input, typically pulled to ground or a low reference...

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