Code Definition

B1679 — Alarm Panic Input Circuit Short To Battery

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

About B1679

B1679 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 B1679 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.

B1679 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

B1679 indicates that the Body Control Module (BCM) or anti theft control module has detected a short to battery voltage condition on the alarm panic input circuit. The panic input is normally a low voltage signal driven by the keyless entry receiver or a hardwired panic switch, and the module sets this code when it sees the circuit pulled high to battery voltage instead of switching cleanly between active and inactive states. The fault commonly occurs when the panic input wire chafes against an unfused B+ source, when an internal short develops in the keyless entry receiver, or when water intr...

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