Service Repair Manual

GENERAL (FBC)
Symptom
Poor fuel mileage FBC system
Probable cause
Engine coolant temperature sensor
malfunction
Oxygen sensor malfunction
Timing control system malfunction
Feedback solenoid valve malfunction
Slow-cut solenoid valve malfunction
Throttle position sensor malfunction
Engine speed sensor malfunction
Harness broken/short-circuited or
connector not connected securely
Remedy
Check by using checker
(Check component and replace
if faulty)
Check by using checker
(Check component and replace
if faulty)
Check system. If faulty, check
components
Check drive signal by using
checker
Check component
Check drive signal by using
checker
Check components
Check component and adjust
Check by using checker
Check harness for continuity
Repair or replace
31-79