Problem Symptoms Table [03/2017 - 09/2018]

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	Link
Engine does not crank (Does not start)	Battery	Refer to PROCEDURE - Step 1
	ST NO. 1 relay	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Starter assembly	Refer to INSPECTION [03/2017 - ]
	VC output circuit (ECM 5 V output)	Refer to VC Output Circuit [03/2017 - 05/2023]
	Starter signal circuit	Refer to Starter Signal Circuit [03/2017 - 05/2023]
	Smart access system with push-button start (for start function)	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 09/2018]
No initial combustion (Does not start)	Immobilizer system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 09/2018]
	ECM power source circuit	Refer to ECM Power Source Circuit [03/2017 - 05/2023]
	VC output circuit (ECM 5 V output)	Refer to VC Output Circuit [03/2017 - 05/2023]
	Crankshaft position sensor	Refer to DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent [03/2017 - ]
	VVT sensor (for intake camshaft)	Refer to DTC P0340: Camshaft Position Sensor Circuit; DTC P0345: Camshaft Position Sensor "A" Circuit (Bank 2) [03/2017 - ]
	VVT sensor (for exhaust camshaft)	Refer to DTC P0365: Camshaft Position Sensor "B" Circuit (Bank 1); DTC P0390: Camshaft Position Sensor "B" Circuit (Bank 2) [03/2017 - ]
	Camshaft position sensor	Refer to DTC P1340: Camshaft Position Sensor "A" (Bank 1 Sensor 2) [03/2017 - ]
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [03/2017 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Valve timing	Refer to PROCEDURE - Step 7
	Starter signal circuit	Refer to Starter Signal Circuit [03/2017 - 05/2023]
	ECM	Refer to TERMINALS OF ECM [03/2017 - 04/2020]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [03/2017 - 09/2018]
Engine cranks normally but difficult to start	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [03/2017 - ]
	Fuel pump with seal sub-assembly (for high pressure side)	Refer to INSPECTION [03/2017 - ]
	Engine coolant temperature sensor	Refer to INSPECTION [03/2017 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Port fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Direct fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Compression	Refer to PROCEDURE - Step 10
	Intake system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Engine difficult to start	Refer to Engine Difficult to Start [03/2017 - ]
	PCV hose	Refer to COMPONENTS [03/2017 - ]
	Starter signal circuit	Refer to Starter Signal Circuit [03/2017 - 05/2023]
	ECM power source circuit	Refer to ECM Power Source Circuit [03/2017 - 05/2023]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [03/2017 - 09/2018]
Incomplete intermittent combustion occurs (Does not start)	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [03/2017 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Fuel line	-
	Fuel pump assembly (for low pressure side)	Refer to INSPECTION [03/2017 - ]
	Fuel pump with seal sub-assembly (for high pressure side)	Refer to INSPECTION [03/2017 - ]
	Port fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Direct fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Crankshaft position sensor	Refer to DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent [03/2017 - ]
	VVT sensor (for intake camshaft)	Refer to DTC P0340: Camshaft Position Sensor Circuit; DTC P0345: Camshaft Position Sensor "A" Circuit (Bank 2) [03/2017 - ]
	VVT sensor (for exhaust camshaft)	Refer to DTC P0365: Camshaft Position Sensor "B" Circuit (Bank 1); DTC P0390: Camshaft Position Sensor "B" Circuit (Bank 2) [03/2017 - ]
	Camshaft position sensor	Refer to DTC P1340: Camshaft Position Sensor "A" (Bank 1 Sensor 2) [03/2017 - ]
	Valve timing	Refer to PROCEDURE - Step 7
	Starter signal circuit	Refer to Starter Signal Circuit [03/2017 - 05/2023]
	ECM power source circuit	Refer to ECM Power Source Circuit [03/2017 - 05/2023]
High engine speed	Air conditioning signal circuit	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Engine coolant temperature sensor	Refer to INSPECTION [03/2017 - ]
	PCV hose	Refer to COMPONENTS [03/2017 - ]
	PCV system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	ECM power source circuit	Refer to ECM Power Source Circuit [03/2017 - 05/2023]
Low engine speed (Poor idle)	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [03/2017 - ]
	Fuel pump with seal sub-assembly (for high pressure side)	Refer to INSPECTION [03/2017 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	PCV hose	Refer to COMPONENTS [03/2017 - ]
Engine stalls on deceleration	Idle speed (refer to "Low engine speed" symptom)	Refer to Engine Stalls [03/2017 - ]
Rough idle	Rough idling	Refer to Rough Idling [03/2017 - ]
	Compression (engine mechanical)	Refer to PROCEDURE - Step 10
	Air fuel ratio sensor	Refer to INSPECTION [03/2017 - ]
	Heated oxygen sensor	Refer to INSPECTION [03/2017 - ]
	Mass air flow meter sub-assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Air conditioning signal circuit	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ]
	Port fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Direct fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Fuel line	-
	Fuel pump assembly (for low pressure side)	Refer to INSPECTION [03/2017 - ]
	Fuel pump with seal sub-assembly (for high pressure side)	Refer to INSPECTION [03/2017 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Electronic throttle control system	Refer to DTC P0120: Throttle Pedal Position Sensor / Switch "A" Circuit; DTC P0121: Throttle Pedal Position Sensor / Switch "A" Circuit Range / Performance; 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 [03/2017 - ]
	PCV hose	Refer to COMPONENTS [03/2017 - ]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [03/2017 - 09/2018]
Hunting (Poor idle)	Electronic throttle control system	Refer to DTC P0120: Throttle Pedal Position Sensor / Switch "A" Circuit; DTC P0121: Throttle Pedal Position Sensor / Switch "A" Circuit Range / Performance; 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 [03/2017 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	ECM power source circuit	Refer to ECM Power Source Circuit [03/2017 - 05/2023]
	PCV hose	Refer to COMPONENTS [03/2017 - ]
	Mass air flow meter sub-assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Air fuel ratio sensor	Refer to INSPECTION [03/2017 - ]
	Drive start control system	Refer to Drive Start Control System [03/2017 - 09/2018]
Hesitation/Poor acceleration (Poor driveability)	Fuel line	-
	Fuel pump assembly (for low pressure side)	Refer to INSPECTION [03/2017 - ]
	Fuel pump with seal sub-assembly (for high pressure side)	Refer to INSPECTION [03/2017 - ]
	Spark plug	Refer to PROCEDURE - Step 3
	Ignition system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Port fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Direct fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	ECM power source circuit	Refer to ECM Power Source Circuit [03/2017 - 05/2023]
	Mass air flow meter sub-assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Valve timing	Refer to PROCEDURE - Step 7
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Air intake control circuit	Refer to Air Intake Control Circuit [03/2017 - ]
	Knock control sensor	Refer to INSPECTION [03/2017 - ]
	Compression (engine mechanical)	Refer to PROCEDURE - Step 10
	Brake override system	Refer to Brake Override System [03/2017 - ]
	Drive start control system	Refer to Drive Start Control System [03/2017 - 09/2018]
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [03/2017 - 09/2018]
Lack of power	Lack of power	Refer to Lack of Power [03/2017 - ]
Surging (Poor driveability)	Spark plug	Refer to PROCEDURE - Step 3
	Fuel line	-
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [03/2017 - ]
	Fuel pump with seal sub-assembly (for high pressure side)	Refer to INSPECTION [03/2017 - ]
	Ignition system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Port fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Direct fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	ECM power source circuit	Refer to ECM Power Source Circuit [03/2017 - 05/2023]
	Mass air flow meter sub-assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Variable Valve Timing (VVT) system	Refer to DTC P0011: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); DTC P0021: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2) [03/2017 - 09/2018]
	Compression (engine mechanical)	Refer to PROCEDURE - Step 10
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [03/2017 - 09/2018]
Engine stalls soon after starting	Fuel pump control circuit	Refer to Fuel Pump Control Circuit [03/2017 - ]
	Fuel pump assembly (for low pressure side)	Refer to INSPECTION [03/2017 - ]
	Fuel pump with seal sub-assembly (for high pressure side)	Refer to INSPECTION [03/2017 - ]
	Fuel line	-
	Spark plug	Refer to PROCEDURE - Step 3
	Ignition system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Port fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	Direct fuel injector assembly	Refer to INSPECTION [03/2017 - ]
	ECM power source circuit	Refer to ECM Power Source Circuit [03/2017 - 05/2023]
	Mass air flow meter sub-assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Throttle body with motor assembly	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	Engine stalls	Refer to Engine Stalls [03/2017 - ]
	Intake system	Refer to ON-VEHICLE INSPECTION [03/2017 - ]
	PCV valve and hose	Refer to INSPECTION [03/2017 - ]
	Compression (engine mechanical)	Refer to PROCEDURE - Step 10
	No. 1 valve rocker arm sub-assembly*	Refer to COMPONENTS [03/2017 - 09/2018]
Engine stalls only during air conditioning operation	Air conditioning signal circuit	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ]
Engine stalls only during air conditioning operation	ECM	Refer to TERMINALS OF ECM [03/2017 - 04/2020]
Unable/difficult to refuel	Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.)	-
MIL (malfunction indicator lamp) malfunction	MIL Circuit	Refer to MIL Circuit [03/2017 - ]
MIL (malfunction indicator lamp) malfunction	Meter/Gauge system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - ]
Exhaust sound does not change	Exhaust Gas Control Circuit	Refer to Exhaust Gas Control Circuit [03/2017 - 05/2023]

HINT:

*: Check "Fuel Cut Elps Time" in the Data List. If the elapsed time is over 0 sec, then the engine speed is high (the engine speed at which fuel cut occurs + 500 rpm or more). In this situation, there is a possibility that a No. 1 valve rocker arm sub-assembly will become loose and malfunction, check that the No. 1 valve rocker arm sub-assemblies are properly installed.

Refer to COMPONENTS [03/2017 - 09/2018]