Engine Controls - System & Component Testing

• Introduction
• Air Induction Systems
  • Acoustic Control Induction System (ACIS) - GS300 & SC300
    • Intake Air Control Valve
    • ACIS Vacuum Tank
    • ACIS Vacuum Switching Valve
  • Acoustic Control Induction System (ACIS) - GS400, LS400 & SC400
    • Intake Air Control Valve
    • ACIS Vacuum Tank
    • ACIS Vacuum Switching Valve
• Computerized Engine Controls
  • ECM Back-Up Power Circuit (Battery)
  • ECM Power Source Circuit (Ignition Keyed)
    • Notes
    • Circuit Description
    • GS300 & GS400
    • LS400
    • SC300 & SC400
  • Starter Signal Circuit
    • Notes
    • Circuit Description
    • Diagnosis & Repair (Using Lexus Scan Tool)
    • Diagnosis & Repair (Using OBD-II Scan Tool) - GS300 & GS400
    • Diagnosis & Repair (Using OBD-II Scan Tool) - LS400
    • Diagnosis & Repair (Using OBD-II Scan Tool) - SC300 & SC400
• Engine Sensors & Switches
  • Accelerator Pedal Position Sensor
  • Camshaft Position Sensor
  • Crankshaft Position Sensor
  • Engine Coolant Temperature (ECT) Sensor
  • Heated Oxygen Sensor Heater Resistance
  • Heated Oxygen Sensor Operation
  • Intake Air Temperature (IAT) Sensor
    • IAT Sensor Resistance
  • Knock Sensor
  • Mass Airflow (MAF) Sensor
    • MAF Sensor Resistance
    • MAF Sensor Voltage
  • Park/Neutral Position (PNP) Switch
  • Park/Neutral Position (PNP) Switch Circuit
  • Throttle Position (TP) Sensor
    • GS300 & SC300
    • GS400, LS400 & SC400
  • Vapor Pressure Sensor
  • Variable Valve Timing Sensor
    • Notes
    • GS400
    • SC400 & LS400
  • Vehicle Speed Sensor (VSS)
    • Notes
    • GS300, LS400, SC300 & SC400
• Motors, Relays & Solenoids
  • Motors
    • Throttle Control Motor
  • Relays
    • Notes
    • Preliminary Information
    • Test Procedure No. 1
    • Test Procedure No. 2
    • Test Procedure No. 3
  • Solenoids
    • ACIS Vacuum Switching Valve (VSV)
    • EVAP Vacuum Switching Valve
    • Fuel Injectors
    • Vapor Pressure Sensor Vacuum Switching Valve (GS300 & GS400)
    • Canister Closed Valve Vacuum Switching Valve (LS400, SC300 & SC400)
    • Pressure Switching Valve Vacuum Switching Valve (LS400, SC300 & SC400)
• Fuel System
  • Fuel Delivery
    • Notes
    • Fuel Pump Operation (Using Battery Voltage) - GS300 & GS400
    • Fuel Pump Operation (Using Battery Voltage) - LS400, SC300 & SC400
    • Fuel Pump Resistance (GS300 & GS400)
    • Fuel Pump Resistance (LS400, SC300 & SC400)
    • Fuel Pump Control Circuit (GS300 & GS400)
    • Fuel Pump Control Circuit (LS400)
    • Fuel Pump Control Circuit (SC300 & SC400)
    • Fuel Pump Pressure (All Models)
    • Fuel Pressure Regulator (All Models)
  • Fuel Control
    • Fuel Injector Circuit
    • Fuel Injector Operation
    • Fuel Injector Resistance
    • Fuel Injector Volume
  • Fuel Pump Resistor
    • LS400
  • Fuel Cut System Operation
    • GS300 & SC300
    • GS400, LS400 & SC400)
• Ignition System
• Emission Systems & Sub-Systems
  • Notes
  • Fuel Evaporation System (GS300 & GS400)
    • Notes
    • Fuel EVAP System Test
    • Charcoal Canister
    • EVAP Vacuum Switching Valve
    • Vapor Pressure Sensor Circuit
    • Vapor Pressure Sensor Vacuum Switching Valve
  • Fuel Evaporation System (LS400, SC300 & SC400)
    • Fuel EVAP System Test
    • Charcoal Canister
    • EVAP Vacuum Switching Valve
    • Vapor Pressure Sensor Circuit (LS400)
    • Vapor Pressure Sensor Circuit (SC300 & SC400)
    • Pressure Switching Valve Vacuum Switching Valve
    • Canister Closed Valve Vacuum Switching Valve
  • Positive Crankcase Ventilation (PCV)
    • PCV Valve
• Variable Valve Timing (VVT) System
  • Variable Valve Timing (VVT) System Operation
  • Camshaft Timing Oil Control Valve
    • Notes
    • Resistance Check (GS300 & SC300)
    • Resistance Check (GS400, LS400 & SC400)
    • Oil Control Valve Operation (GS300 & SC300)
    • Oil Control Valve Operation (GS400, LS400 & SC400)
  • Variable Valve Timing (VVT) Sensor
• Throttle Controls
  • Throttle Body
    • Notes
    • Throttle System Operation (GS300 & SC300)
    • Throttle System Operation (GS400 & SC400)
    • Throttle System Operation (LS400)
• Miscellaneous Controls
  • Notes
  • Cooling Fan System
  • Transmission