SFI SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
Use the table below to help determine the cause of a problem symptom. 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 area in the order they are listed. Repair or replace faulty parts or perform adjustments as necessary.
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine does not crank (Does not start) | Immobiliser system (w/ Entry and Start System) | |
| Immobiliser system (w/o Entry and Start System) | ||
| ECM power source circuit | ||
| Entry and start system | ||
| Starter | ||
| No initial combustion (Does not start) | ECM power source circuit | |
| VC output circuit (ECM 5 V output) | ||
| Crankshaft position sensor | ||
| Fuel pump control circuit | ||
| Ignition system | ||
| Fuel injector circuit | ||
| Valve timing | ||
| Engine cranks normally but difficult to start | Fuel pump control circuit | |
| Fuel pump | ||
| Engine coolant temperature sensor | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Compression | ||
| Fuel injector circuit | ||
| Intake system | ||
| Throttle body assembly | ||
| Starter signal circuit | ||
| Incomplete intermittent combustion occurs (Does not start) | Fuel pump control circuit | |
| Starter pinion does not stop quickly | Starter | |
| Starter relay | ||
| Fuel pump | ||
| Fuel line | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Crankshaft position sensor | ||
| Valve timing | ||
| High engine speed (Poor idle) | Air conditioning signal circuit (for Automatic Air Conditioning System) | |
| Air conditioning signal circuit (for Manual Air Conditioning System) | ||
| Throttle body assembly | ||
| Engine coolant temperature sensor | ||
| PCV hose | ||
| PCV system | ||
| Low engine speed (Poor idle) | Fuel pump control circuit | |
| Throttle body assembly | ||
| Intake system | ||
| PCV hose | ||
| PCV system | ||
| Engine stalls on deceleration | Idle speed (refer to "Low engine speed" symptom) | - |
| Rough idle | Compression (engine mechanical system) | |
| Air fuel ratio sensor (sensor 1) | ||
| Heated oxygen sensor (sensor 2) | ||
| Mass air flow meter | ||
| Ignition system | ||
| Air conditioning signal circuit | ||
| Fuel line (clogged or blocked) | ||
| Valve timing | ||
| Fuel pump | ||
| Intake system | ||
| PCV hose | ||
| PCV system | ||
| Hunting (Poor idle) | PCV hose | |
| PCV system | ||
| Mass air flow meter | ||
| Air fuel ratio sensor (sensor 1) | ||
| Engine stalls during air conditioning operation | Air conditioning signal circuit (compressor circuit) | |
| ECM | ||
| Hesitation/poor acceleration (Poor driveability) | Fuel line | |
| Fuel pump | ||
| Valve timing | ||
| Mass air flow meter | ||
| Throttle body assembly | ||
| Knock control sensor | ||
| Surging (Poor driveability) | Fuel line | |
| Fuel pump control circuit | ||
| Fuel pump | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Engine stalls soon after starting | Mass air flow meter | |
| Intake system | ||
| Fuel line | ||
| MIL malfunction | MIL circuit |