Code Definition

B10A3 — Swivel Actuator (LH) Error Signal Received (Adaptive Front-Lighting System)

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

About B10A3

B10A3 is a manufacturer-specific body diagnostic trouble code recorded for Mazda 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.

B10A3 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 Adaptive Front Lighting System (AFS) is fitted to certain Mazda models and swivels each headlight beam in the direction of steering at appropriate vehicle speeds to improve night vision around corners. The AFS control module drives a swivel actuator at each headlight and continuously monitors the feedback position signal from each actuator. Code B10A3 is logged when the module receives an error status from the left hand swivel actuator, such as an out of range feedback voltage, no position response to a command, or an invalid self test result persisting longer than the diagnostic threshold...

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