Toyota Venza: Problem Symptoms Table

Toyota Venza Service Manual / 1ar-fe Engine Control / Sfi System / Problem Symptoms Table

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 page
Engine does not crank (Does not start)	Battery
	Starter
	VC output circuit (ECM 5 V output)
	Starter signal circuit
No initial combustion (Does not start)	Engine immobiliser system (w/ smart key system)
	Engine immobiliser system (w/o smart key system)
	ECM power source circuit
	Crankshaft position sensor
	Ignition system
	Fuel pump control circuit
	Fuel injector circuit
	Valve timing
	VC output circuit (ECM 5 V output)
	Camshaft position sensor
	Starter signal circuit
	ECM
	No. 1 valve rocker arm sub-assembly*
Engine cranks normally but difficult to start	Fuel pump control circuit
	Fuel pump
	Fuel injector circuit
	Engine coolant temperature sensor
	Intake system
	Ignition system
	Spark plug
	Throttle body
	Compression
	Starter signal circuit
	ECM power source circuit
	No. 1 valve rocker arm sub-assembly*
Incomplete intermittent combustion occurs (Does not start)	Fuel pump control circuit
	Fuel pump
	Ignition circuit
	Ignition system
	Fuel injector circuit
	ECM power source circuit
	Crankshaft position sensor
	Valve timing
	Camshaft position sensor
High engine speed	Throttle body
	Intake system
	A/C signal circuit
	ECM power source circuit
	Engine coolant temperature sensor
	PCV valve and hose
	Acoustic Control Induction System (ACIS)
Low engine speed (Poor idle)	Throttle body
	A/C signal circuit
	Fuel pump control circuit
	Fuel pump
	Intake system
	PCV valve and hose
Rough idle	Compression
	Ignition system
	Spark plug
	Fuel injector circuit
	ECM power source circuit
	Fuel pump control circuit
	Fuel pump
	Throttle body
	Intake system
	PCV valve and hose
	Air fuel ratio sensor
	Heated oxygen sensor
	Mass air flow meter
	ACIS control circuit
	Tumble Control Valve (TCV)
	No. 1 valve rocker arm sub-assembly*
	External part malfunction (Increase in load: A/C system, etc.)	-
Hunting (Poor idle)	Throttle body
	Intake system
	PCV valve and hose
	Air fuel ratio sensor
	Mass air flow meter
	ACIS control circuit
	Tumble Control Valve (TCV)
Hesitation/poor acceleration	Fuel pump control circuit
	Fuel pump
	Spark plug
	Ignition system
	Fuel injector circuit
	ECM power source circuit
	Mass air flow meter
	Throttle body
	Intake system
	Valve timing
	Compression
	Brake override system
	No. 1 valve rocker arm sub-assembly*
Surging (Poor driveability)	Spark plug
	Fuel pump control circuit
	Fuel pump
	Ignition system
	Fuel injector circuit
	ECM power source circuit
	Mass air flow meter
	Variable Valve Timing (VVT) system
	Compression
	No. 1 valve rocker arm sub-assembly*
Engine stalls soon after starting	Fuel pump control circuit
	Fuel pump
	Spark plug
	Ignition system
	Fuel injector circuit
	ECM power source circuit
	Mass air flow meter
	Variable valve timing (VVT) system
	Throttle body
	Intake system
	PCV valve and hose
	Compression
	No. 1 valve rocker arm sub-assembly*
Engine stalls only during A/C operation	A/C signal circuit
Engine stalls only during A/C operation	ECM
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 No. 1 valve rocker arm sub-assembly is properly attached (See page ).

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