Toyota Venza manuals

Toyota Venza: 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


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 ).


Initialization
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