Toyota Fortuner. Sfi System Problem Symptoms Table

Sfi System -- Problem Symptoms Table

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	Toyota Fortuner RM000000ZQX009X.html
	2. Starter	Toyota Fortuner RM000000SH0013X.html
	3. ST relay	Toyota Fortuner RM000000WPQ00KX_01_0001.html
No initial combustion (does not start)	1. ECM power source circuit	Toyota Fortuner RM000000ZQP00BX.html
	2. VC output circuit	Toyota Fortuner RM000001EP1008X.html
	3. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
	4. ECM	Toyota Fortuner RM000000VW200JX.html
No complete combustion (does not start)	1. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
Engine cranks normally but difficult to start	1. Starter signal circuit	Toyota Fortuner RM000000ZQX009X.html
	2. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
	3. Compression	Toyota Fortuner RM000000YN1008X_01_0009.html
Difficult to start with cold engine	1. Starter signal circuit	Toyota Fortuner RM000000ZQX009X.html
Difficult to start with cold engine	2. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
Difficult to start with hot engine	1. Starter signal circuit	Toyota Fortuner RM000000ZQX009X.html
Difficult to start with hot engine	2. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
High engine idling speed (poor idling)	1. A/C signal circuit	-
High engine idling speed (poor idling)	2. ECM power source circuit	Toyota Fortuner RM000000ZQP00BX.html
Low engine idling speed (poor idling)	1. A/C signal circuit	-
Low engine idling speed (poor idling)	2. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
Rough idling (poor idling)	1. Compression	Toyota Fortuner RM000000YN1008X_01_0009.html
	2. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
	3. Variable resistor circuit*	Toyota Fortuner RM00000134E002X.html
Hunting (poor idling)	1. ECM power source circuit	Toyota Fortuner RM000000ZQP00BX.html
Hunting (poor idling)	2. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
Hesitation / Poor acceleration (poor driveability)	1. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
Hesitation / Poor acceleration (poor driveability)	2. Variable resistor circuit*	Toyota Fortuner RM00000134E002X.html
Surging (poor driveability)	1. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
Engine stalls soon after starting	1. Fuel pump control circuit	Toyota Fortuner RM000000ZQO007X.html
Engine stalls during A/C operation	1. A/C signal circuit (compressor circuit)	-
Engine stalls during A/C operation	2. ECM	Toyota Fortuner RM000000VW200JX.html
MIL is not illuminated	1. MIL circuit	Toyota Fortuner RM000000ZQY00CX.html

HINT:

*: for Leaded Gasoline Specification Vehicle.