Symptom Related Diagnostic Procedures
3UR-FBE ENGINE CONTROL: SFI SYSTEM: PROBLEM SYMPTOMS TABLE
HINT
* Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
* Inspect the fuses and relays related to this system before inspecting the suspected areas below.
HINT
Due to the factors listed below, cold engine starting trouble, rough idle, poor drivability, and engine stall may occur:
* The vehicle is filled with fuel that has an alcohol concentration of 100% (E100).
* The Data List item "Alcohol Density Learning" on the Techstream is "Incmpl" (if "Alcohol Density Learning" is "Incmpl", this means that the alcohol concentration learning has not been completed).
* "Alcohol Density Learning" does not change to "Incmpl" even though the vehicle is refueled (if the amount refueled is 2 gallons or less, or the fuel sender gauge is malfunctioning, "Alcohol Density Learning" may not change to "Incmpl"). The ECM does not perform alcohol concentration learning if "Alcohol Density Learning" does not change to "Incmpl". If alcohol concentration learning is not performed, the ECM cannot command the injectors to inject the appropriate amount of fuel for combustion.