Problem Symptoms Table

HINT:

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 checking 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	Refer to
Engine does not crank (Does not start)	Battery	Refer to ON-VEHICLE INSPECTION
	Starter	Refer to INSPECTION
	Starter relay	Refer to ON-VEHICLE INSPECTION
	Cranking Holding Function Circuit	Refer to Cranking Holding Function Circuit
	Park / neutral position switch	Refer to INSPECTION
	VC output circuit	Refer to VC Output Circuit
	Immobiliser system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING
No initial combustion (Does not start)	ECM power source circuit	Refer to ECM Power Source Circuit
	Crankshaft position sensor	Refer to DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0337: Crankshaft Position Sensor "A" Circuit Low Input; DTC P0338: Crankshaft Position Sensor "A" Circuit High Input; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent
	Camshaft position sensor	Refer to DTC P1340: Camshaft Position Sensor "A" (Bank 1 Sensor 2); DTC P1342: Camshaft Position Sensor "A" Low Input (MRE); DTC P1343: Camshaft Position Sensor "A" High Input (MRE)
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel Injector Circuit	Refer to Fuel Injector Circuit
	ECM	Refer to TERMINALS OF ECM
	VC output circuit	Refer to VC Output Circuit
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
	Immobiliser system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING
Engine cranks normally but difficult to start	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	PCV hose	Refer to ON-VEHICLE INSPECTION - Step 2
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
	ECM power source circuit	Refer to ECM Power Source Circuit
Difficult to start with cold engine	Ignition system	Refer to ON-VEHICLE INSPECTION
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Injector	Refer to INSPECTION
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
Difficult to start with warm engine	Injector	Refer to INSPECTION
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
High engine idle speed	Electronic throttle control system	Refer to ON-VEHICLE INSPECTION
	A/C signal circuit	Refer to TERMINALS OF ECU
	ECM power source circuit	Refer to ECM Power Source Circuit
	Acoustic Control Induction System (ACIS)	Refer to ACIS Control Circuit
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
Low engine idle speed (Poor idling)	Electronic throttle control system	Refer to ON-VEHICLE INSPECTION
	A/C signal circuit	Refer to TERMINALS OF ECU
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Air induction system	Refer to ON-VEHICLE INSPECTION - Step 4
	Acoustic Control Induction System (ACIS)	Refer to ACIS Control Circuit
	PCV hose	Refer to ON-VEHICLE INSPECTION - Step 2
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
Rough idling	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Injector	Refer to INSPECTION
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Electronic throttle control system	Refer to ON-VEHICLE INSPECTION
	Air induction system	Refer to ON-VEHICLE INSPECTION - Step 4
	Acoustic Control Induction System (ACIS)	Refer to ACIS Control Circuit
	PCV hose	Refer to ON-VEHICLE INSPECTION - Step 2
	Mass air flow meter	Refer to INSPECTION
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
Idle hunting	Electronic throttle control system	Refer to ON-VEHICLE INSPECTION
	Air induction system	Refer to ON-VEHICLE INSPECTION - Step 4
	ECM power source circuit	Refer to ECM Power Source Circuit
	Acoustic Control Induction System (ACIS)	Refer to ACIS Control Circuit
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
Hesitation/Poor acceleration	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Injector	Refer to INSPECTION
	Mass air flow meter	Refer to INSPECTION
	Electronic throttle control system	Refer to ON-VEHICLE INSPECTION
	Air induction system	Refer to ON-VEHICLE INSPECTION - Step 4
	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
	Brake override system	Refer to Brake Override System
Surging (Poor driveability)	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Injector	Refer to INSPECTION
	Mass air flow meter	Refer to INSPECTION
	Variable valve timing system	Refer to ON-VEHICLE INSPECTION
	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
Engine stalls soon after starting	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Injector	Refer to INSPECTION
	Variable valve timing system	Refer to ON-VEHICLE INSPECTION
	Electronic throttle control system	Refer to ON-VEHICLE INSPECTION
	Air induction system	Refer to ON-VEHICLE INSPECTION - Step 4
	PCV hose	Refer to ON-VEHICLE INSPECTION - Step 2
	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Fuel Pressure Switching System	Refer to Fuel Pressure Switching System
Engine stalls only during A/C operation	A/C signal circuit	Refer to TERMINALS OF ECU
Engine stalls only during A/C operation	ECM	Refer to TERMINALS OF ECM
Unable/difficult to refuel	Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.)	-

HINT:

Due to the factors listed below, cold engine starting trouble, rough idle, poor drivability, and engine stall may occur:

The vehicle is filled with fuel that has an alcohol concentration of 100% (E100).
The Data List item "Alcohol Density Learning" on the Techstream is "Incmpl" (if "Alcohol Density Learning" is "Incmpl", this means that the alcohol concentration learning has not been completed).
"Alcohol Density Learning" does not change to "Incmpl" even though the vehicle is refueled (if the amount refueled is 2 gallons or less, or the fuel sender gauge is malfunctioning, "Alcohol Density Learning" may not change to "Incmpl"). The ECM does not perform alcohol concentration learning if "Alcohol Density Learning" does not change to "Incmpl". If alcohol concentration learning is not performed, the ECM cannot command the injectors to inject the appropriate amount of fuel for combustion.