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Home >> Lexus >> 2012 >> IS 250 Base, RWD, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Fuel Delivery >> Fuel System (Inspection) >> Fuel System >> System Diagram >> System Diagram

System Diagram

  1. FUEL FLOW DIAGRAM 
    Fig 1: Identifying Fuel Flow Diagram
    GTY283365Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. ELECTRICAL CONTROL DIAGRAM 
    Fig 2: Fuel System Electrical Control Diagram
    GTY135590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. HIGH PRESSURE SIDE FUEL SYSTEM WIRING DIAGRAM 
    Fig 3: Identifying High Pressure Side Fuel System Wiring Diagram (1 Of 2)
    GTY258531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: High Pressure Side Fuel System Wiring Diagram From Battery
    GTY272149Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. LOW PRESSURE SIDE FUEL SYSTEM WIRING DIAGRAM 
    Fig 5: Low Pressure Side Fuel System Wiring Diagram
    GTY123181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. COLD START INJECTOR CIRCUIT DESCRIPTION 
    1. The cold start injector is attached to the intake air surge tank. The cold start injector is designed to improve the ability of the engine to perform a cold start. It operates when the engine coolant temperature is -12°C (10°F) or less, the engine speed is 400 rpm or less, and the starter signal is on.