Determines camshaft and crankshaft position and sends this information to the onboard computer. The computer uses this and other inputs to calculate injector on time and ignition system timing.

• 确定凸轮轴和曲轴的位置，将信息发送到机载计算机上。这样计算机会根据这些信息和其他数据来计算喷射器和点火系统计时。