Lexus LX 570 exterior lighting or headlamp fault: symptoms and diagnosis This Lexus LX guide is based on 2 documented technical cases, including 2 confirmed successful repair outcomes. It summarizes the captured evidence without assuming every vehicle with a similar symptom has the same cause. Documented applicability includes 2013–2014.
What Drivers or Technicians Reported
Documented complaints included: SRS lamp on with occupant-classification and seat-belt tension-sensor faults.; Brake lamps inoperative..
Fault Codes Seen in Supporting Cases
Codes included B1650, B1776. A code is a diagnostic clue, not automatic proof that a specific part failed.
Causes Confirmed in Documented Cases
Faulty passenger seat-belt buckle/tension-sensor assembly. Skid Control ECU failed to ground the BRK LP relay control circuit.
What the Diagnostic Process Found
ABSENT PASS
Repairs That Corrected Documented Cases
Replace passenger seat-belt buckle Replace Skid Control ECU
Lexus LX Diagnosis in Hickory, NC
Mich's Foreign Cars has served Hickory and the surrounding Western North Carolina area since 1983. We specialize in European and foreign vehicles and use professional diagnostic equipment to identify the cause before recommending repairs. If your Lexus LX is showing this symptom or fault pattern, call Mich's Foreign Cars at 828-324-6012 to schedule diagnosis.