Code Definition

B1677 — Alarm Panic Input Circuit Failure

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

About B1677

B1677 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1677 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.

B1677 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 Body Control Module (BCM) or dedicated security/alarm module monitors the alarm panic input, which is a switched signal triggered by the panic button on the remote keyless entry fob, an interior panic switch, or in some platforms a long press of the door lock button. DTC B1677 is set when the BCM detects a failure on this input circuit, typically a stuck active state, an unexpected toggle pattern, or a circuit that does not return to its rest state within an acceptable time window. When this code is set, the panic alarm function may activate spuriously, fail to activate when commanded, or ...

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