Code Definition

B1981 — Memory Off Switch Circuit Short to Battery

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

About B1981

B1981 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 B1981 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.

B1981 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 driver door module or seat module monitors the memory off switch as part of the seat and mirror memory system. The switch is a momentary contact that pulls the input line to a specific state when pressed to cancel or turn off the memory recall function. DTC B1981 sets when the module detects the switch input line is held at battery voltage continuously when no operator command should be present, indicating a stuck switch, a chafed wire touching a power feed, or a damaged switch pack bridging the input to a 12V source. When this code is active the memory off function may be disabled or the ...

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