Symptom Troubleshooting [Engine Mechanical L3 With TC]

Symptom Troubleshooting Wiring Diagram
Foreword
Symptom Diagnostic Index
Control System Device And Control Relationship Chart
Quick Diagnostic Chart
No. 1 Melting Of Main Or Other Fuses
No. 2 Mil Illuminates
No. 3 Will Not Crank
No. 4 Hard To Start/Long Crank/Erratic Start/Erratic Crank
No. 5 Engine Stalls-After Start/At Idle
No. 6 Cranks Normally But Will Not Start
No. 7 Slow Return To Idle
No. 8 Engine Runs Rough/Rolling Idle
No. 9 Fast Idle/Runs On
No. 10 Low Idle/Stalls During Deceleration
No. 11 Engine Stalls/Quits, Engine Runs Rough, Misses, Buck/Jerk, Hesitation/Stumble, Surges
No. 12 Lack/Loss Of Power-Acceleration/Cruise
No. 13 Knocking/Pinging
No. 14 Poor Fuel Economy
No. 15 Emission Compliance
No. 16 High Oil Consumption/Leakage
No. 17 Cooling System Concerns-Overheating
No. 18 Cooling System Concerns-Runs Cold
No. 19 Exhaust Smoke
No. 20 Fuel Odor (In Engine Compartment)
No. 21 Engine Noise
No. 22 Vibration Concerns (Engine)
No. 23 A/C Does Not Work Sufficiently
No. 24 A/C Is Always On Or A/C Compressor Runs Continuously
No. 25 A/C Is Not Cut Off Under Wide Open Throttle Conditions
No. 26 Exhaust Sulphur Smell
No. 27 Fuel Refill Concerns
No. 28 Fuel Filling Shut Off Concerns
No. 29 Spark Plug Condition
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
Engine Control System Operation Inspection
- Input Signal System Investigation Procedure
- Finding unusual signals
- Locating the source of unusual signals
- Thermistor type (IAT sensor, ECT sensor No. 1, ECT sensor No. 2 and boost air temperature sensor)
- Drive-by-wire Control System Inspection