Engine Controls - Basic Diagnostic Procedures

• Introduction
• Preliminary Inspection & Adjustments
  • Visual Inspection
  • Mechanical Inspection
    • Compression
• Fuel System
  • Notes
  • Fuel Pump Operation
    • Notes
    • Checking Fuel Pump Operation Using Scan Tool (ES300 & RX300)
    • Checking Fuel Pump Operation Using Scan Tool (GS300, GS400, SC300 & SC400)
    • Checking Fuel Pump Operation Using Scan Tool (LS400)
    • Checking Fuel Pump Operation Using Scan Tool (LX470)
    • Checking Fuel Pump Operation By Applying Battery Voltage To Fuel Pump
  • Fuel Pressure Release
  • Fuel Pressure
    • Es300
    • GS300 & SC300
    • GS400, LS400 & SC400
    • Lx470
    • RX300
  • Fuel Pump Control Circuit
    • Notes
    • Circuit Opening Relay (ES300 & RX300)
    • Circuit Opening Relay (LS400)
    • EFI Main Relay (ES300 & RX300)
    • EFI Main Relay (GS300 & GS400)
    • EFI Main Relay (LS400)
    • EFI Main Relay (LX470)
    • EFI Main Relay (SC300 & SC400)
    • Fuel Pump Electronic Control Unit (ECU) - (GS300 & GS400)
    • Fuel Pump Electronic Control Unit (ECU) - (SC300 & SC400)
    • Fuel Pump Electronic Control Unit (ECU) & Fuel Pump Switch (LX470)
    • Fuel Pump Relay & Fuel Pump Resistor (LS400)
• Ignition Checks
  • Spark Test
    • Es300, GS400, LS400, Lx470, RX300 & SC400
    • GS300 & SC300
  • Camshaft Position Sensor Resistance
  • Crankshaft Position Sensor Resistance
    • Es300, GS400, Lx470 & RX300
    • GS300 & SC300
    • LS400 & SC400
  • Ignition Coil Resistance
    • Es300, GS400, LS400, Lx470, RX300 & SC400
    • GS300 & SC300
• Idle Speed & Ignition Timing
• Summary