What does it mean when the BSM light is on in a Lexus?
1 Answers
BSM stands for Blind Spot Monitoring, a function that utilizes two sensors located inside the rear quarter panels on both sides of the vehicle. These sensors emit specific radar waves while driving to monitor approaching vehicles from behind, subsequently illuminating the BSM warning light on the side mirrors to alert the driver. Below are the reasons why the engine warning light may illuminate in a car: 1. Sensor issues: The sensors referred to here include those for coolant temperature, crankshaft position, air flow, intake air temperature, oxygen sensors, etc. When these sensors are damaged, have poor connections, or experience signal interruptions, the car's ECU cannot accurately obtain engine data, which can trigger the engine warning light. 2. Maintenance issues: Poor engine maintenance is the most common cause of engine warning light activation.