丰田皇冠３．０轿车的发动机为ＺＪＺ-ＧＥ型，采用的是压感式电子控制燃油喷射系统（简称ＥＦＩ）。ＥＦＩ系统主要由燃油供给系统、空气供给系统和发动机电子控制电路（ＥＣＵ和传感器）三大部分组成。发动机控制器具有故障自诊断系统，正常时ＥＣＶ接受来自发动机转速?.. Toyota Crown 3.0 car engine for the ZJZ-GE type, using a pressure-sensitive electronic control fuel injection system (referred to as EFI). EFI system is mainly composed of fuel supply system, air supply system and engine electronic control circuit (ECU and sensor) composed of three parts. The engine controller has a fault self-diagnosis system, ECV accepts the engine speed from normal?