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	See
Engine does not crank (Does not start)	Battery	Refer to ON-VEHICLE INSPECTION - Step 1
	VC output circuit	Refer to VC Output Circuit
	Cranking holding function circuit	Refer to Cranking Holding Function Circuit
	Starter	Refer to INSPECTION
No initial combustion (Does not start)	Immobilizer system	Refer to PROBLEM SYMPTOMS TABLE
	ECM power source circuit	Refer to ECM Power Source Circuit
	Camshaft position sensor (for intake camshaft)	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)
	Camshaft position sensor (for exhaust camshaft)	Refer to DTC P0365: Camshaft Position Sensor "B" Circuit (Bank 1); DTC P0367: Camshaft Position Sensor "B" Circuit Low Input (Bank 1); DTC P0368: Camshaft Position Sensor "B" Circuit High Input (Bank 1)
	VC output circuit	Refer to VC Output Circuit
	Crankshaft position sensor	Refer to INSPECTION
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Fuel injector circuit	Refer to Fuel Injector Circuit
	Valve timing	Refer to PROCEDURE - Step 8
	Cranking holding function circuit	Refer to Cranking Holding Function Circuit
	ECM	Refer to REMOVAL
	Valve rocker arm sub-assembly*	Refer to REMOVAL
Engine cranks normally but difficult to start	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Engine coolant temperature sensor	Refer to INSPECTION
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Injector	Refer to INSPECTION
	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Intake system	Refer to ON-VEHICLE INSPECTION
	Fuel injector circuit	Refer to Fuel Injector Circuit
	Throttle body	Refer to INSPECTION
	ECM power source circuit	Refer to ECM Power Source Circuit
	Valve rocker arm sub-assembly*	Refer to REMOVAL
Incomplete intermittent combustion occurs (Does not start)	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Ignition circuit	Refer to DTC P0351: Ignition Coil "A" Primary / Secondary Circuit; DTC P0352: Ignition Coil "B" Primary / Secondary Circuit; DTC P0353: Ignition Coil "C" Primary / Secondary Circuit; DTC P0354: Ignition Coil "D" Primary / Secondary Circuit
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Fuel injector circuit	Refer to Fuel Injector Circuit
	ECM power source circuit	Refer to ECM Power Source Circuit
	Crankshaft position sensor	Refer to INSPECTION
	Camshaft position sensor (for intake camshaft)	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)
	Camshaft position sensor (for exhaust camshaft)	Refer to DTC P0365: Camshaft Position Sensor "B" Circuit (Bank 1); DTC P0367: Camshaft Position Sensor "B" Circuit Low Input (Bank 1); DTC P0368: Camshaft Position Sensor "B" Circuit High Input (Bank 1)
	Valve timing	Refer to PROCEDURE - Step 8
High engine idle speed	A/C signal circuit	Refer to PROBLEM SYMPTOMS TABLE
	Throttle body	Refer to INSPECTION
	Intake system	Refer to ON-VEHICLE INSPECTION
	Engine coolant temperature sensor	Refer to INSPECTION
	PCV valve and hose	Refer to REMOVAL
	ECM power source circuit	Refer to ECM Power Source Circuit
Low engine idle speed (Poor idle)	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Throttle body	Refer to INSPECTION
	A/C signal circuit	Refer to PROBLEM SYMPTOMS TABLE
	Intake system	Refer to ON-VEHICLE INSPECTION
	PCV valve and hose	Refer to REMOVAL
Rough idle	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Air fuel ratio sensor	Refer to INSPECTION
	Heated oxygen sensor	Refer to INSPECTION
	Mass air flow meter	Refer to INSPECTION
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Intake system	Refer to ON-VEHICLE INSPECTION
	Throttle body	Refer to INSPECTION
	PCV valve and hose	Refer to INSPECTION
	Fuel injector circuit	Refer to Fuel Injector Circuit
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Valve rocker arm sub-assembly*	Refer to INSPECTION
Idle hunting	Throttle body	Refer to INSPECTION
	Intake system	Refer to ON-VEHICLE INSPECTION
	PCV valve and hose	Refer to INSPECTION
	Air fuel ratio sensor	Refer to INSPECTION
	Mass air flow meter	Refer to ON-VEHICLE INSPECTION
Hesitation/Poor acceleration	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Fuel injector circuit	Refer to Fuel Injector Circuit
	ECM power source circuit	Refer to ECM Power Source Circuit
	Mass air flow meter	Refer to INSPECTION
	Throttle body	Refer to INSPECTION
	Intake system	Refer to ON-VEHICLE INSPECTION
	Valve timing	Refer to PROCEDURE - Step 8
	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Brake override system	Refer to Brake Override System
	Valve rocker arm sub-assembly*	Refer to INSPECTION
Surging (Poor driveability)	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Fuel injector circuit	Refer to Fuel Injector Circuit
	ECM power source circuit	Refer to ECM Power Source Circuit
	Mass air flow meter	Refer to INSPECTION
	Variable valve timing (VVT) system	Refer to DTC P0011: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); DTC P0012: Camshaft Position "A" - Timing Over-Retarded (Bank 1)
	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Valve rocker arm sub-assembly*	Refer to INSPECTION
Engine stalls soon after starting	Fuel pump control circuit	Refer to Fuel Pump Control Circuit
	Fuel pump	Refer to INSPECTION
	Spark plug	Refer to ON-VEHICLE INSPECTION - Step 3
	Ignition system	Refer to ON-VEHICLE INSPECTION
	Fuel injector circuit	Refer to Fuel Injector Circuit
	ECM power source circuit	Refer to ECM Power Source Circuit
	Mass air flow meter	Refer to INSPECTION
	Variable valve timing (VVT) system	Refer to DTC P0011: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); DTC P0012: Camshaft Position "A" - Timing Over-Retarded (Bank 1)
	Throttle body	Refer to INSPECTION
	Intake system	Refer to ON-VEHICLE INSPECTION
	PCV valve and hose	Refer to INSPECTION
	Compression	Refer to ON-VEHICLE INSPECTION - Step 10
	Valve rocker arm sub-assembly*	Refer to INSPECTION
Engine stalls only during A/C operation	A/C signal circuit	Refer to PROBLEM SYMPTOMS TABLE
Engine stalls only during A/C operation	ECM	Refer to REMOVAL
Unable/difficult to refuel	Fuel system (canister, refueling valve, roll-over valve, fuel tank, etc.)	-

HINT:

*: Check the "Fuel Cut Elps Time" in the Data List.

If the elapsed time is over 0 sec, then the engine speed is high (More than the engine speed at which fuel cut occurs + 500 rpm).

When this has happened, there is the possibility that the valve rocker arm will become loose and malfunction, so check that the valve rocker arm is properly attached. Refer to REMOVAL .