Engine Controls - System & Component Testing

• Introduction
• Air Induction Systems
  • Acoustic Control Induction System (ACIS)
    • Notes
    • 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
    • Es300
    • RX300
  • Starter Signal Circuit
    • Notes
    • Circuit Description
    • Diagnosis & Repair (Using Lexus Scan Tool)
    • Diagnosis & Repair (Using OBD-II Scan Tool) - ES300
    • Diagnosis & Repair (Using OBD-II Scan Tool) - RX300
• Engine Sensors & Switches
  • Air/Fuel Ratio (A/F) Sensor Heater Resistance
  • 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
  • Vapor Pressure Sensor
  • Variable Valve Timing Sensor
  • Vehicle Speed Sensor (VSS)
• Relays & Solenoids
  • Relays
    • Notes
    • Air/Fuel (A/F) HTR Relay, Circuit Opening Relay, EFI Main Relay Or Starter Relay
  • Solenoids
    • ACIS Vacuum Switching Valve
    • EVAP Vacuum Switching Valve
    • Fuel Injectors
    • Vapor Pressure Sensor Vacuum Switching Valve
• Fuel System
  • Fuel Delivery
    • Fuel Pump Operation (Using Lexus Scan Tool)
    • Fuel Pump Operation (Using Battery Voltage)
    • Fuel Pump Resistance
    • Fuel Pump Control Circuit
    • Fuel Pump Pressure
    • Fuel Pressure Regulator
  • Fuel Control
    • Fuel Injector Circuit
    • Fuel Injector Operation
    • Fuel Injector Resistance
    • Fuel Injector Volume (ES300)
    • Fuel Injector Volume (RX300)
  • Fuel Cut System Operation
• Idle Air Control (IAC) System
  • System Operation
  • Air Assist System
  • IAC Valve Operation
• Ignition System
• Emission Systems & Sub-Systems
  • Notes
  • Fuel Evaporation System
    • Notes
    • Fuel EVAP System Test (ES300 & RX300 Late Release)
    • Fuel EVAP System Test (RX300 Early Release)
    • Charcoal Canister (All Models)
    • EVAP Vacuum Switching Valve (All Models)
    • Vapor Pressure Sensor Circuit (All Models)
    • Vapor Pressure Sensor Vacuum Switching Valve (All Models)
  • 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
    • Oil Control Valve Operation
  • Variable Valve Timing (VVT) Sensor
• Throttle Controls
  • Throttle Opener
    • Notes
    • Es300
• Miscellaneous Controls
  • Notes
  • Cooling Fan System
  • Transmission