SFI SYSTEM PROBLEM SYMPTOMS TABLE

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 cranking 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.

SFI System
Symptom	Suspected Area	See page
Engine does not crank (Does not start)	Battery	Click here
	Starter assembly	Click here
	Starter relay	Click here
	Starter signal circuit (w/o entry and start system)	Click here
	Entry and start system (for start function) (w/ entry and start system)	Click here
	Clutch start switch assembly (for manual transaxle)	Click here
	Park/neutral position switch assembly (for CVT)	Click here
	VC output circuit (ECM 5 V output) (w/ entry and start system)	Click here
No initial combustion (Does not start)	ECM power source circuit	Click here
	VC output circuit (ECM 5 V output) (w/o entry and start system)	Click here
	Crankshaft position sensor	Click here
	Fuel pump control circuit	Click here
	Ignition system	Click here
	Fuel injector circuit	Click here
	Valve timing	Click here
	Starter signal circuit (w/o entry and start system)	Click here
	Cranking holding function circuit (w/ entry and start system)	Click here
	Immobiliser system (w/ entry and start system)	Click here
	Immobiliser system (w/o entry and start system)	Click here
	Valve rocker arm*1	Click here
Engine cranks normally but difficult to start	Fuel pump control circuit	Click here
	Fuel pump	Click here
	Engine coolant temperature sensor	Click here
	Ignition system	Click here
	Fuel injector assembly	Click here
	Compression	Click here
	Fuel injector circuit	Click here
	Intake system	Click here
	Throttle body assembly	Click here
	EGR valve assembly	Click here
	Valve rocker arm*1	Click here
Incomplete intermittent combustion occurs (Does not start)	Fuel pump control circuit	Click here
	Fuel pump	Click here
	Fuel lines	-
	Ignition circuit	Click here
	Ignition system	Click here
	Fuel injector assembly	Click here
	Crankshaft position sensor	Click here
	Valve timing	Click here
High engine speed (Poor idle)	Air conditioning signal circuit (for automatic air conditioning system)	Click here
	Air conditioning signal circuit (for manual air conditioning system)	Click here
	Throttle body assembly	Click here
	Throttle body control	-
	Engine coolant temperature sensor	Click here
	PCV hose	Click here
	PCV valve	Click here
	ECM power source circuit	Click here
	EGR valve assembly	Click here
Low engine speed (Poor idle)	Fuel pump control circuit	Click here
	Throttle body assembly	Click here
	Throttle body control	-
	Intake system	Click here
	PCV hose	Click here
	PCV valve	Click here
	EGR valve assembly	Click here
Engine stalls on deceleration	Idle speed (refer to "Low engine speed" symptom)	-
Rough idle	Compression (engine mechanical)	Click here
	Air fuel ratio sensor (bank 1 sensor 1)	Click here
	Mass air flow meter	Click here
	Ignition system	Click here
	Air conditioning signal circuit (for automatic air conditioning system)	Click here
	Air conditioning signal circuit (for manual air conditioning system)	Click here
	Fuel line (clogged or blocked)	-
	Fuel pump	Click here
	Intake system	Click here
	PCV hose	Click here
	PCV valve	Click here
	Heated oxygen sensor (bank 1 sensor 2)	Click here
	EGR valve assembly	Click here
	Valve rocker arm*1	Click here
Hunting (Poor idle)	PCV hose	Click here
	PCV valve	Click here
	Mass air flow meter	Click here
	EGR valve assembly	Click here
	Air fuel ratio sensor (bank 1 sensor 1)	Click here
Engine stalls during air conditioning operation	Air conditioning signal circuit (compressor circuit) (for automatic air conditioning system)	Click here
	Air conditioning signal circuit (compressor circuit) (for manual air conditioning system)	Click here
	ECM	Click here
Hesitation/Poor acceleration (Poor driveability)	Fuel line	-
	Fuel pump	Click here
	Mass air flow meter	Click here
	Throttle body assembly	Click here
	Knock sensor	Click here
	Valve timing	Click here
	Ignition system	Click here
	EGR valve assembly	Click here
	Valve rocker arm*1	Click here
	Brake override system	Click here
Surging (Poor driveability)	Fuel line	-
	Fuel pump control circuit	Click here
	Fuel pump	Click here
	Ignition system	Click here
	Fuel injector assembly	Click here
	EGR valve assembly	Click here
	Valve rocker arm*1	Click here
Engine stalls soon after starting	Mass air flow meter	Click here
	Intake system	Click here
	Fuel line	-
	Fuel pump control circuit	Click here
	Fuel pump	Click here
	Ignition system	Click here
	Fuel injector assembly	Click here
	Throttle body assembly	Click here
	PCV hose	Click here
	PCV valve	Click here
	Valve rocker arm*1	Click here

Tech Tips

*1: Check the "Fuel Cut Elps Time" value in the Data List.

If the value is more than 0 seconds, a high engine speed (fuel cut speed + 500 rpm or more) has occurred in the past. Since the problem may be caused by valve rocker arm detaching due to an extremely high engine speed, check that the valve rocker arms are properly attached.