SFI SYSTEM(w/ Canister Pump Module) PROBLEM SYMPTOMS TABLE

Tech Tips


  • 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

Click here

ST NO. 1 relay

Click here

Starter assembly

Click here

Starter signal circuit

Click here

Entry and start system (for start function)

Click here

VC output circuit (ECM 5 V output)

Click here

Park/neutral position switch assembly

Click here

No initial combustion (Does not start) Immobiliser system

Click here

ECM power source circuit

Click here

VC output circuit (ECM 5 V output)

Click here

Ignition system

Click here

Fuel pump control circuit

Click here

Port fuel injector assembly

Click here

Direct fuel injector assembly

Click here

Crankshaft position sensor

Click here

Intake system

Click here

Valve timing

Click here

No. 1 valve rocker arm sub-assembly*

Click here

Engine cranks normally but difficult to start ECM power source circuit

Click here

Flow chart [Engine difficult to start]

Click here

Throttle body with motor assembly

Click here

Fuel pump assembly (for high pressure side)

Click here

Fuel pump (for low pressure side)

Click here

Engine coolant temperature sensor

Click here

Fuel pump control circuit

Click here

Ignition system

Click here

Spark plug

Click here

Compression

Click here

Port fuel injector assembly

Click here

Direct fuel injector assembly

Click here

Crankshaft position sensor

Click here

Intake system

Click here

Valve timing

Click here

No. 1 valve rocker arm sub-assembly*

Click here

Incomplete intermittent combustion occurs (Does not start) Fuel pump control circuit

Click here

Ignition system

Click here

Port fuel injector assembly

Click here

Direct fuel injector assembly

Click here

Crankshaft position sensor

Click here

Intake system

Click here

Valve timing

Click here

High engine speed Throttle body with motor assembly

Click here

ECM power source circuit

Click here

PCV hose

Click here

PCV system

Click here

Low engine speed (Poor idle) Fuel pump control circuit

Click here

Throttle body with motor assembly

Click here

Port fuel injector assembly

Click here

Direct fuel injector assembly

Click here

Fuel pump assembly (for high pressure side)

Click here

PCV hose

Click here

PCV system

Click here

Intake system

Click here

No. 2 turbo pressure sensor

Click here

Electric water pump assembly

Click here

Rough idle Flow chart [Rough idling]

Click here

Throttle body with motor assembly

Click here

Port fuel injector assembly

Click here

Direct fuel injector assembly

Click here

Fuel pump assembly (for high pressure side)

Click here

Ignition system

Click here

Compression

Click here

Fuel pump control circuit

Click here

Spark plug

Click here

Intake system

Click here

Valve timing

Click here

No. 1 valve rocker arm sub-assembly*

Click here

No. 2 turbo pressure sensor

Click here

Electric water pump assembly

Click here

Hunting (Poor idle) Throttle body with motor assembly

Click here

ECM power source circuit

Click here

Fuel pump control circuit

Click here

Spark plug

Click here

Intake system

Click here

Electric water pump assembly

Click here

Drive start control system

Click here

Hesitation/Poor acceleration (Poor driveability) Port fuel injector assembly

Click here

Direct fuel injector assembly

Click here

Fuel pump control circuit

Click here

Fuel pump assembly (for high pressure side)

Click here

Ignition system

Click here

Spark plug

Click here

Intake system

Click here

Valve timing

Click here

No. 2 turbo pressure sensor

Click here

Vacuum regulating valve assembly

Click here

Waste gate valve

Click here

Waste gate valve actuator with bracket assembly

Click here

Air by-pass valve assembly

Click here

Compressor housing with bearing sub-assembly

Click here

Electric water pump assembly

Click here

No. 1 valve rocker arm sub-assembly*

Click here

Brake override system

Click here

Drive start control system

Click here

Lack of power Flow chart [Lack of power]

Click here

Vacuum regulating valve assembly

Click here

Waste gate valve

Click here

Waste gate valve actuator with bracket assembly

Click here

Air by-pass valve assembly

Click here

Compressor housing with bearing sub-assembly

Click here

Surging (Poor driveability) Fuel pump control circuit

Click here

Spark plug

Click here

Port fuel injector assembly

Click here

Direct fuel injector assembly

Click here

Electric water pump assembly

Click here

No. 1 valve rocker arm sub-assembly*

Click here

Engine stalls soon after starting Flow chart [Engine stalls]

Click here

Fuel pump control circuit

Click here

Throttle body with motor assembly

Click here

Crankshaft position sensor

Click here

Ignition system

Click here

Fuel pump assembly (for high pressure side)

Click here

Intake system

Click here

Valve timing

Click here

No. 2 turbo pressure sensor

Click here

Electric water pump assembly

Click here

Engine stalls soon after slow down Flow chart [Engine stalls]

Click here

Port fuel injector assembly

Click here

Direct fuel injector assembly

Click here

Throttle body with motor assembly

Click here

ECM

Click here

Crankshaft position sensor

Click here

Ignition system

Click here

Air by-pass valve assembly

Click here

Unable/difficult to refuel Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) -
White smoke emitted Flow chart [Turbocharger oil leak and white smoke]

Click here

Turbocharger noise Flow chart [Turbocharger noise]

Click here

Drive mode does not change Drive mode select switch circuit

Click here

SNOW mode does not change Pattern select switch snow mode circuit

Click here

Tech Tips

*: Check "Fuel Cut Elapsed 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.

Click here