SFI SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of a problem. The likely cause of the problem are indicated in descending order. Check each suspected area in order. Repair or replace faulty parts or perform adjustments as necessary.

SFI System:
Symptom Suspected Area See page
Engine does not crank (Does not start) Immobiliser system (w/ Entry and Start System)

Click here

Immobiliser system (w/o Entry and Start System)

Click here

Entry and start system

Click here

Starter

Click here

No initial combustion (Does not start) ECM power source circuit

Click here

VC output circuit (ECM 5 V output)

Click here

Crankshaft position sensor

Click here

Fuel pump circuit

Click here

Ignition system

Click here

Fuel injector circuit

Click here

Valve timing

Click here

Starter signal circuit

Click here

Engine cranks normally but difficult to start Fuel pump control circuit

Click here

Fuel pump

Click here

Engine coolant temperature sensor

Click here

Ignition system

Click here

Injector

Click here

Compression

Click here

Fuel injector circuit

Click here

Intake system

Click here

Throttle body

Click here

Starter signal circuit

Click here

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

Click here

Fuel pump

Click here

Fuel lines

Click here

Ignition circuit

Click here

Ignition system

Click here

Fuel injector

Click here

Crankshaft position sensor

Click here

Valve timing

Click here

Starter signal circuit

Click here

Starter pinion does not stop quickly Starter

Click here

Starter relay

Click here

High engine speed (Poor idle) Air conditioning signal circuit (for automatic air conditioning system)

Click here

Air conditioning signal circuit (for manual air conditioning system)

Click here

Throttle body

Click here

Throttle body control -
Engine coolant temperature sensor

Click here

PCV hose

Click here

PCV system

Click here

ECM power source circuit

Click here

ACIS control circuit

Click here

Low engine speed (Poor idle) Fuel pump control circuit

Click here

Throttle body

Click here

Throttle body control -
Intake system

Click here

PCV hose

Click here

PCV system

Click here

ACIS control circuit

Click here

Engine stalls on deceleration Idle speed (refer to "Low engine speed" symptom) -
Rough idle Compression (engine mechanical)

Click here

Air fuel ratio sensor

Click here

Mass air flow meter

Click here

Ignition system

Click here

Air conditioning signal circuit (for automatic air conditioning system)

Click here

Air conditioning signal circuit (for manual air conditioning system)

Click here

Fuel line (clogged or blocked)

Click here

Fuel pump

Click here

Intake system

Click here

PCV hose

Click here

PCV system

Click here

ACIS control circuit

Click here

VALVEMATIC system

Click here

Hunting (Poor idle) PCV hose

Click here

PCV system

Click here

Mass air flow meter

Click here

Air fuel ratio sensor

Click here

ACIS control circuit

Click here

Engine stalls during air conditioning operation Air conditioning signal circuit (for automatic air conditioning system)

Click here

Air conditioning signal circuit (for manual air conditioning system)

Click here

ECM

Click here

Hesitation/Poor acceleration (Poor driveability) VALVEMATIC system

Click here

Lack of power or hesitation

Click here

Fuel line

Click here

Fuel pump

Click here

Valve timing

Click here

Mass air flow meter

Click here

Throttle body

Click here

Knock sensor

Click here

Surging (Poor driveability) Fuel line

Click here

Fuel pump control circuit

Click here

Fuel pump

Click here

Ignition system

Click here

Injector

Click here

Engine stalls soon after starting Mass air flow meter

Click here

Intake system

Click here

Fuel line

Click here

VALVEMATIC system

Click here