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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) 13A-113 DTC SET CONDITIONS Logic Flow Chart . Check Conditions • Engine coolant temperature was 7°C (45°F) or more immediately before the engine was stopped • Engine coolant temperature was 7°C (45°F) or more when the engine started. Judgement Criteria • Engine coolant temperature fluctuates within 1°C (34 °F) after 5 minutes have passed since the engine was started. • However, time is not counted if any of the follow- ing conditions are met. 1. Intake air temperature is 60 °C (140°F) or more. 2. Volume airflow sensor output frequency is 70 Hz or less. 3. During fuel shut-off operation. • The PCM monitors for this condition once during the drive cycle. . START END YES NO NO YES MALFUNCTION GOOD 300secs HAVE PASSED? |dT| < 1˚C(34˚F) MONITORING CONDITIONS? START MEASURING THE MINIMUM AND MAXIMUM TEMPERATURE FROM ENGINE START CALCULATE THE DIFFERENCE OF THE MINIMUM AND THE MAXIMUM TEMPERATURE FROM ENGINE START;dT YES NO AK303237 |