Code Definition

B1A00 — Restraint Control Module

System: Body  |  Type: Manufacturer-Specific  |  Make: Land Rover

About B1A00

B1A00 is a manufacturer-specific body diagnostic trouble code recorded for Land Rover vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

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.

B1A00 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 Restraint Control Module (RCM) on Land Rover vehicles is the central airbag and seatbelt pretensioner controller. It continuously runs internal self diagnostic routines that monitor memory integrity, processor performance, internal voltage rail regulation, deployment loop drivers, and communication validity with other safety related modules such as the seat occupancy sensors, side impact sensors, and instrument cluster. DTC B1A00 is logged when the RCM detects an internal malfunction it cannot recover from. When this code is active the airbag warning lamp is illuminated, the Supplemental R...

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