SFI SYSTEM > PROBLEM SYMPTOMS TABLE

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HINT:

Use the table below to help determine the cause of the problem symptom. 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.

SFI system
Symptom	Suspected Area	See page
Engine does not crank (does not start)	1. Starter signal circuit	Click here
	2. Starter (for 1.6 kW Type)	Click here
	3. Starter (for 1.7 kW Type)	Click here
	4. Starter (for 1.4 kW Type)	Click here
	5. ST relay	Click here
No initial combustion (does not start)	1. ECM power source circuit	Click here
	2. VC output circuit	Click here
	3. Fuel pump control circuit	Click here
	4. ECM	Click here
No complete combustion (does not start)	1. Fuel pump control circuit	Click here
Engine cranks normally but difficult to start	1. Starter signal circuit	Click here
	2. Fuel pump control circuit	Click here
	3. Compression	Click here
Difficult to start with cold engine	1. Starter signal circuit	Click here
Difficult to start with cold engine	2. Fuel pump control circuit	Click here
Difficult to start with hot engine	1. Starter signal circuit	Click here
Difficult to start with hot engine	2. Fuel pump control circuit	Click here
High engine idling speed (poor idling)	1. A/C signal circuit	-
High engine idling speed (poor idling)	2. ECM power source circuit	Click here
Low engine idling speed (poor idling)	1. A/C signal circuit	-
Low engine idling speed (poor idling)	2. Fuel pump control circuit	Click here
Rough idling (poor idling)	1. Compression	Click here
	2. Fuel pump control circuit	Click here
	3. Variable resistor circuit*1	Click here
Hunting (poor idling)	1. ECM power source circuit	Click here
Hunting (poor idling)	2. Fuel pump control circuit	Click here
Hesitation / Poor acceleration (poor driveability)	1. Fuel pump control circuit	Click here
	2. A/T faulty*2	Click here
	3. Variable resistor circuit*1	Click here
	4. Brake Override System	Click here
Surging (poor driveability)	1. Fuel pump control circuit	Click here
Engine stalls soon after starting	1. Fuel pump control circuit	Click here
Engine stalls soon after starting	2. ECM	Click here
Engine stalls during A/C operation	1. A/C signal circuit (compressor circuit)	-
Engine stalls during A/C operation	2. ECM	Click here
MIL is not illuminated	1. MIL circuit	Click here

HINT:

*1: for Leaded Gasoline Specification Vehicle.

*2: for A/T