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)	Hybrid control system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING
Engine does not crank (Does not start)	VC output circuit (ECM 5 V output)	Refer to VC Output Circuit
No initial combustion (Does not start)	ECM power source circuit	Refer to ECM Power Source Circuit
	VC output circuit (ECM 5 V output)	Refer to VC Output Circuit
	Crankshaft position sensor	Refer to INSPECTION
	Valve timing	Refer to PROCEDURE - Step 4
	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
Engine cranks normally but difficult to start	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Engine coolant temperature sensor	Refer to INSPECTION
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Compression	Refer to ON-VEHICLE INSPECTION - Step 9
	Fuel injector assembly	Refer to INSPECTION - Step 1
	Fuel injector circuit	Refer to Fuel Injector Circuit
	Intake system	Refer to ON-VEHICLE INSPECTION
	Throttle with motor body assembly	Refer to INSPECTION
	PCV valve and hose	Refer to COMPONENTS
	EGR valve assembly	Refer to INSPECTION
	ECM power source circuit	Refer to ECM Power Source Circuit
Incomplete intermittent combustion occurs (Does not start)	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Fuel line	-
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Fuel injector circuit	Refer to Fuel Injector Circuit
	EGR valve assembly	Refer to INSPECTION
	ECM power source circuit	Refer to ECM Power Source Circuit
	Crankshaft position sensor	Refer to INSPECTION
	Camshaft position sensor	Refer to DTC P0340: Camshaft Position Sensor Circuit Malfunction; DTC P0342: Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor); DTC P0343: Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)
	Valve timing	Refer to PROCEDURE - Step 4
High engine speed	Throttle with motor body assembly	Refer to INSPECTION
	Intake system	Refer to ON-VEHICLE INSPECTION
	ECM power source circuit	Refer to ECM Power Source Circuit
	Engine coolant temperature sensor	Refer to INSPECTION
	PCV valve and hose	Refer to COMPONENTS
Low engine speed (Poor idle)	Throttle with motor body assembly	Refer to INSPECTION
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Intake system	Refer to ON-VEHICLE INSPECTION
	PCV valve and hose	Refer to COMPONENTS
Rough idle	Compression	Refer to ON-VEHICLE INSPECTION - Step 9
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Fuel injector circuit	Refer to Fuel Injector Circuit
	ECM power source circuit	Refer to ECM Power Source Circuit
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Fuel line	-
	Throttle with motor body assembly	Refer to INSPECTION
	Intake system	Refer to ON-VEHICLE INSPECTION
	Purge VSV	Refer to INSPECTION
	PCV valve and hose	Refer to COMPONENTS
	Air fuel ratio sensor	Refer to INSPECTION
	Heated oxygen sensor	Refer to INSPECTION
	Mass air flow meter sub-assembly	Refer to INSPECTION
	Manifold absolute pressure sensor	Refer to DTC P0107: Manifold Absolute Pressure / Barometric Pressure Circuit Low Input; DTC P0108: Manifold Absolute Pressure / Barometric Pressure Circuit High Input
	Knock control sensor	Refer to INSPECTION
	EGR valve assembly	Refer to INSPECTION
Hunting (Poor idle)	Electronic throttle control system	Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
	Intake system	Refer to ON-VEHICLE INSPECTION
	ECM power source circuit	Refer to ECM Power Source Circuit
Hesitation and/or poor acceleration (Poor driveability)	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
	Fuel injector assembly	Refer to INSPECTION
	Mass air flow meter sub-assembly	Refer to INSPECTION
	Electronic throttle control system	Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
	Intake system	Refer to ON-VEHICLE INSPECTION
	Compression	Refer to ON-VEHICLE INSPECTION - Step 9
	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
	Fuel injector assembly	Refer to INSPECTION
	Mass air flow meter sub-assembly	Refer to INSPECTION
	Variable Valve Timing (VVT) system	Refer to DTC P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
	Compression	Refer to ON-VEHICLE INSPECTION - Step 9
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
	Fuel injector assembly	Refer to INSPECTION
	Variable Valve Timing (VVT) system	Refer to DTC P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
	Electronic throttle control system	Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
	Intake system	Refer to ON-VEHICLE INSPECTION
	Manifold absolute pressure sensor	Refer to DTC P0107: Manifold Absolute Pressure / Barometric Pressure Circuit Low Input; DTC P0108: Manifold Absolute Pressure / Barometric Pressure Circuit High Input
	PCV valve and hose	Refer to COMPONENTS
	Compression	Refer to ON-VEHICLE INSPECTION - Step 9
	EGR valve assembly	Refer to INSPECTION
Unable/difficult to refuel	Fuel system (canister, roll-over valve, fuel tank, etc.)	-