Engine Controls - Basic Diagnostic Procedures - 4-Cylinder

• Introduction
• Preliminary Inspection & Adjustments
  • Visual Inspection
  • Mechanical Inspection
    • Compression (Camry CNG & Gasoline Models, Camry Solara, Celica, Corolla, ECHO & RAV4)
    • Compression (Tacoma & 4Runner)
• Fuel Systems
  • Notes
  • Fuel Pump Operation
    • Notes
    • Checking Fuel Pump Operation Using Scan Tool (Camry Gasoline Models, Camry Solara, RAV4, Tacoma & 4Runner)
    • Checking Fuel Pump Operation Using Scan Tool (Celica, Corolla & ECHO)
    • Checking Fuel Pump Operation By Applying Battery Voltage To Fuel Pump
  • Fuel System Pressure Release
    • Notes
    • Camry CNG Models
    • Camry Gasoline Models, Camry Solara, Celica, Corolla, ECHO, RAV4, Tacoma & 4Runner
  • Fuel Pressure
    • Camry CNG Models
    • Camry Gasoline Models & Camry Solara
    • Celica, Corolla & ECHO
    • RAV4
    • Tacoma & 4Runner
  • Fuel Pump Control Circuit
    • Notes
    • Circuit Opening Relay (Camry CNG Models)
    • Circuit Opening Relay (Camry Gasoline Models & Camry Solara)
    • Circuit Opening Relay (Celica & ECHO)
    • Circuit Opening Relay (Corolla)
    • Circuit Opening Relay (RAV4)
    • Circuit Opening Relay (Tacoma)
    • Circuit Opening Relay (4Runner)
    • EFI Main Relay (Camry CNG Models)
    • EFI Main Relay (Camry Gasoline Models & Camry Solara)
    • EFI Main Relay (Celica)
    • EFI Main Relay (Corolla)
    • EFI Main Relay (ECHO)
    • EFI Main Relay (RAV4)
    • EFI Main Relay (Tacoma & 4Runner)
• Ignition Systems
  • Notes
  • Spark Test
    • Camry CNG & Gasoline Models, Camry Solara & RAV4
    • Celica, Corolla & ECHO
    • Tacoma 2.4L 4-Cyl. Calif. Emission Vehicles, Tacoma 2.7L 4-Cyl. Calif. Emission Vehicles & 4Runner 2.7L 4-Cyl. Calif. Emission Vehicles)
    • Tacoma 2.4L 4-Cyl. Except Calif. Emission Vehicles, Tacoma 2.7L 4-Cyl. Except Calif. Emission Vehicles & 4Runner 2.7L 4-Cyl. Except Calif. Emission Vehicles
  • Ignition Coil Resistance
    • Camry CNG & Gasoline Models, Camry Solara, RAV4, Tacoma 2.4L 4-Cyl. Except Calif. Emission Vehicles, Tacoma 2.7L 4-Cyl. Except Calif. Emission Vehicles & 4Runner 2.7L 4-Cyl. Except Calif. Emission Vehicles
    • Celica, Corolla, ECHO, Tacoma 2.4L 4-Cyl. Calif. Emission Vehicles, Tacoma 2.7L 4-Cyl. Calif. Emission Vehicles & 4Runner 2.7L 4-Cyl. Calif. Emission Vehicles
  • Camshaft Position Sensor Resistance
    • Camry CNG & Gasoline Models, & Camry Solara
    • Celica & Corolla
    • Echo
    • RAV4
    • Tacoma & 4Runner
  • Crankshaft Position Sensor Resistance
    • Camry CNG & Gasoline Models, & Camry Solara
    • Celica & Corolla
    • Echo
    • RAV4
    • Tacoma & 4Runner
• Idle Speed & Ignition Timing
• Summary