ES300 — NEW FEATURES 23 Main Components of Engine Control System 1) General The following table compares the main components of the 1MZ-FE engine in the ’99 ES300 and ’98 ES300. * 1 : Only for California Specification Model * 2 : Except California Specification Model 2) Mass Air Flow Meter As in the ’98 model, the plug-in type has been adopted. However, an even more compact mass air flow meter has been adopted in the ’99 model.
1MZ-FE Engine Components ’99 ES300 ’98 ES300 Mass Air Flow Meter Hot-Wire Type Crankshaft Position Sensor Pick-Up Coil Type, 1 Camshaft Position Sensor — Pick-Up Coil Type, 1 VVT Sensor Pick-Up Coil Type, 2 — Throttle Position Sensor Linear Type, 1 Knock Sensor Built-In Piezoelectric Type, 2 Oxygen Sensor Air Fuel Ratio Sensor (Bank 1, Sensor 1) (Bank 2, Sensor 1) Heated Oxygen Sensor (Bank 1, Sensor 2) Air Fuel Ratio Sensor (Bank 1, Sensor 1)*1 (Bank 2, Sensor 1)*1 Heated Oxygen Sensor (Bank 1, Sensor 1)*2 (Bank 2, Sensor 1)*2 (Bank 1, Sensor 2) Injector 4-Hole Type with Air Assist IAC Valve Rotary Solenoid Type (Built-in Driver) Rotary Solenoid Type