Symptom Troubleshooting - Engine

• Engine Control System Operation Inspection
  • Notes
  • Main Relay Operation Inspection
  • Intake Manifold Vacuum Inspection
  • Electric Variable Valve Timing Driver Control System Inspection
  • Engine Oil Solenoid Valve Control System Inspection
  • Drive-by-wire Control System Inspection
    • Engine coolant temperature compensation inspection
    • Load compensation inspection
    • Electronic Control Throttle Operation Inspection
    • Brake override system operation inspection
  • Wastegate Valve Operation Inspection
  • Fuel Injector Operation Inspection
  • Fuel Cut Control System Inspection
  • Fuel Pump (Low-pressure Side) Operation Inspection
  • Fuel Pump (Low-pressure Side) Control System Inspection
  • Spark Test
  • Purge Control System Inspection
  • EGR Valve Operation Inspection
  • A/C Cut-off Control System Inspection
  • Cooling Fan Control System Inspection
  • Hydraulic Variable Valve Timing Control System Operation Inspection
    • When idling cannot be continued
    • When idling can be continued
  • Evaporative Emission (EVAP) System Leak Inspection
    • Notes
    • Safety precautions
    • Dual purpose diagnostic leak detector (EVAP/low pressure) component parts
    • Air only test
    • Vapor test
• Foreword
  • Notes
  • Troubleshooting Procedure
  • Repair Order Form
  • Action for Non-repeatable Malfunction
• Intermittent Concern Troubleshooting
  • Vibration Method
  • Inspection Method for Switch Connectors or Wires
  • Inspection Method for Sensor Connectors or Wires
  • Inspection Method for Sensors
  • Inspection Method for Actuators or Relays
  • Water Sprinkling Method
• No. 1 Blown Fuses
• No. 2 Check Engine Light Illuminates
  • Notes
  • Diagnostic Procedure
• No. 3 Will Not Crank
  • Notes
  • Diagnostic Procedure
• No. 4 Hard To Start/Long Crank/Erratic Start/Erratic Crank
  • Notes
  • Diagnostic Procedure
• No. 5 Engine Stalls-After Start/At Idle
  • Notes
  • Diagnostic Procedure
• No. 6 Cranks Normally But Will Not Start
  • Notes
  • Diagnostic Procedure
• No. 7 Engine Oil Warning Light Illuminated/Message Related To Engine Hydraulic Pressure Malfunction Indicated In Display
  • Notes
  • Diagnostic Procedure
• No. 8 Engine Runs Rough/Rolling Idle
  • Notes
  • Diagnostic Procedure
• No. 9 Fast Idle/Runs On
  • Notes
  • Diagnostic Procedure
• No. 10 Low Idle/Stalls During Deceleration
  • Notes
  • Diagnostic Procedure
• No. 11 Engine Stalls/Quits, Engine Runs Rough, Misses, Buck/Jerk, Hesitation/Stumble, Surges
  • Notes
  • Diagnostic Procedure
• No. 12 Lack/Loss Of Power-Acceleration/Cruise
  • Notes
  • Diagnostic Procedure
• No. 13 Knocking/Pinging-Acceleration/Cruise
  • Notes
  • Diagnostic Procedure
• No. 14 Poor Fuel Economy
  • Notes
  • Diagnostic Procedure
• No. 15 Emission Compliance
  • Notes
  • Diagnostic Procedure
• No. 16 High Oil Consumption/Leakage
  • Notes
  • Diagnostic Procedure
• No. 17 Cooling System Concerns-Overheating
  • Notes
  • Diagnostic Procedure
• No. 18 Cooling System Concerns-Runs Cold
  • Notes
  • Diagnostic Procedure
• No. 19 Exhaust Smoke
  • Notes
  • Diagnostic Procedure
• No. 20 Fuel Odor (In Engine Compartment)
  • Notes
  • Diagnostic Procedure
• No. 21 Engine Noise
  • Notes
  • Diagnostic Procedure
• No. 22 Vibration Concerns (Engine)
  • Notes
  • Diagnostic Procedure
• No. 23 A/C Does Not Work Sufficiently
  • Notes
  • Diagnostic Procedure
• No. 24 A/C Is Always On Or A/C Compressor Runs Continuously
  • Notes
  • Diagnostic Procedure
• No. 25 Sulfuric Smell Occurs
  • Notes
  • Diagnostic Procedure
• No. 26 Fuel Refill Concerns
  • Notes
  • Diagnostic Procedure
• No. 27 Fuel Filling Shut Off Concerns
  • Notes
  • Diagnostic Procedure
• No. 28 Spark Plug Condition
  • Notes
  • Diagnostic Procedure
• Quick Diagnostic Chart
• Symptom Diagnostic Index
  • Notes
  • Diagnostic Index