Engine does not crank (Does not start)
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Battery
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Starter assembly
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Starter relay
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Starter signal circuit
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Smart key system (for start function)
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Park/neutral position switch (for 2WD)
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Park/neutral position switch (for AWD)
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VC output circuit (w/ smart key system)
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No initial combustion (Does not start)
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ECM power source circuit
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VC output circuit (w/o smart key system)
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Crankshaft position sensor
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Ignition system
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Fuel pump control circuit
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Fuel pump
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Fuel injector circuit
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Valve timing
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VVT sensor (for intake side of bank1, 2)
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VVT sensor (for exhaust side of bank1, 2)
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Cranking holding function circuit
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Starter signal circuit
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Engine immobiliser system (w/ smart key system)
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Engine immobiliser system (w/o smart key system)
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ECM
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Engine cranks normally but difficult to start
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Fuel pump control circuit
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Fuel pump
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Fuel injector circuit
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ECM power source circuit
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Cranking holding function circuit
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Starter signal circuit
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Engine coolant temperature sensor
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Intake system
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Ignition system
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Spark plug
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Fuel injector assembly
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Compression
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Intake system
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Throttle body with motor assembly
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Incomplete intermittent combustion occurs (Does not start)
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Fuel pump control circuit
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Fuel pump
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Fuel line
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Ignition circuit
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Ignition system
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Fuel injector circuit
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Fuel injector assembly
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ECM power source circuit
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Cranking holding function circuit
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Starter signal circuit
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Crankshaft position sensor
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VVT sensor (for intake side of bank1, 2)
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VVT sensor (for exhaust side of bank1, 2)
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Engine immobiliser system (w/ smart key system)
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Engine immobiliser system (w/o smart key system)
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Valve timing
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High engine speed
(Poor idle)
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Throttle body with motor assembly
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Intake system
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A/C signal circuit
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ECM power source circuit
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Engine coolant temperature sensor
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PCV valve and hose
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ACIS control circuit
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Low engine speed
(Poor idle)
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Throttle body with motor assembly
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A/C signal circuit
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Fuel pump control circuit
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Fuel pump
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Intake system
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PCV valve and hose
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ACIS control circuit
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Engine stalls on deceleration
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Idle speed (refer to "Low engine speed")
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Rough idle
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Compression
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Ignition system
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Spark plug
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Fuel injector circuit
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ECM power source circuit
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Fuel pump control circuit
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Fuel pump
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Fuel line
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Throttle body with motor assembly
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Intake system
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PCV valve and hose
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Air fuel ratio sensor
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Heated oxygen sensor
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Mass air flow meter
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Knock sensor
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ACIS control circuit
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External part malfunction (Increase in load: A/C system, CVT system, etc.)
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Hunting (Poor idling)
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Throttle body with motor assembly
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Intake system
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PCV valve and hose
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Air fuel ratio sensor
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Mass air flow meter
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ACIS control circuit
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Hesitation/Poor acceleration
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Fuel pump control circuit
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Fuel pump
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Fuel line
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Spark plug
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Ignition system
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Fuel injector circuit
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ECM power source circuit
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Mass air flow meter
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Throttle body with motor assembly
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Intake system
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Valve timing
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Compression
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Brake override system
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Surging (Poor driveability)
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Spark plug
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Fuel pump control circuit
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Fuel pump
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Ignition system
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Fuel injector circuit
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Fuel injector assembly
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ECM power source circuit
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Mass air flow meter
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Variable Valve Timing (VVT) system
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Compression
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Engine stalls soon after starting
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Fuel pump control circuit
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Fuel pump
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Spark plug
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Ignition system
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Fuel injector circuit
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ECM power source circuit
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Mass air flow meter
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Variable Valve Timing (VVT) system
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Throttle body with motor assembly
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Intake system
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PCV valve and hose
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Compression
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Engine stalls only during A/C operation
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A/C signal circuit
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ECM
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Engine vibrates frequently when idling
(Active control engine mount system)
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Active control engine mount system
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Unable/difficult to refuel
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Fuel system (canister, rollover valve, fuel tank etc.)
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