The 2023 Lexus NX displays "LSS+ System Check Required" when Lexus Safety System+ detects an issue requiring attention. This message indicates the comprehensive safety suite has identified a fault that needs diagnosis.
Lexus Safety System+ Components
LSS+ includes multiple integrated features—Pre-Collision System, Lane Departure Alert, Lane Tracing Assist, Automatic High Beams, Road Sign Assist, and more. These features share sensors, primarily the forward camera and radar. A system check message may affect some or all of these features.
What Causes System Check Messages
Several issues trigger LSS+ system check requirements. Camera hardware faults affecting the shared forward camera trigger warnings. Radar sensor issues impact distance-based features. Windshield replacement without calibration causes detection errors. Module communication faults interrupt system coordination.
Identifying Affected Features
When LSS+ system check appears, identify which features are affected. If all camera-based features are impacted, the camera is likely the issue. If only radar-based features are affected, check the front radar sensor. Understanding the pattern helps focus diagnosis.
Seeking Service
The system check message warrants professional diagnosis. Lexus technicians use Techstream diagnostic equipment to read specific fault codes. This information identifies whether camera, radar, calibration, or module service is needed.