Code Definition

B1563 — Door Ajar Circuit Failure

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

About B1563

B1563 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 B1563 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.

B1563 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

B1563 indicates that the Body Control Module (BCM) has detected a fault in the door ajar input circuit. The door ajar switches mounted in each door jamb signal to the BCM whether the door is open or closed by completing a circuit to ground when the door is open. The BCM uses these inputs to operate the interior courtesy lighting, illuminate the door ajar warning indicator on the instrument cluster, control the central locking auto relock function, and arm the security system. When the BCM detects a door ajar input that is implausible, stuck active, or open circuit on the monitored line, it set...

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