关键词: 节气门位置传感器；磁阻；故障诊断

Abstract: The throttle position sensor is one of the core components for achieving precise control of fuel injection in gasoline vehicles, and the reluctance throttle position sensor is a new type of throttle position sensor. The signal output method of the signal plate and sensor without mechanical contact gives it significant performance advantages such as long service life, stable operation, and low failure rate. With the increasing number of assembled vehicle models, the demand for its detection and maintenance methods and case studies is also increasing. This article takes the Volkswagen Magotan B8L model as an example, first introduces the installation position and function of the reluctance throttle position sensor, then introduces the structure and working principle of the Volkswagen Magotan B8L reluctance throttle position sensor, and finally elaborates on the fault phenomenon, fault analysis, fault diagnosis, and troubleshooting methods of the Magotan B8L reluctance throttle position sensor. Among them, fault diagnosis uses testing and diagnostic tools such as car decoders, oscilloscopes, and multimeters, which have certain reference significance for similar electronic control system fault diagnosis.

Key words: Throttle position sensor; Magnetic resistance; Fault diagnosis