SFI SYSTEM 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.
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine does not crank (Does not start) | Battery | |
| Starter assembly | ||
| Entry and start system (for start function) | ||
| Cranking holding function circuit (w/ entry and start system) | ||
| Starter relay | ||
| VC output circuit | ||
| Park/neutral position switch assembly [for automatic transmission] | ||
| Clutch start switch assembly (for LHD) [for manual transmission] | ||
| Clutch start switch assembly (for RHD) [for manual transmission] | ||
| No initial combustion (Does not start) | Engine immobiliser system (w/ entry and start system) | |
| Engine immobiliser system (w/o entry and start system) | ||
| ECM power source circuit | ||
| Crankshaft position sensor | ||
| VVT sensor | ||
| Ignition system | ||
| Fuel pump control circuit | ||
| Fuel injector circuit | ||
| ECM | ||
| VC output circuit | ||
| Starter signal circuit (w/o entry and start system) | ||
| Cranking holding function circuit (w/ entry and start system) | ||
| Engine cranks normally but difficult to start | Fuel pump control circuit | |
| Engine coolant temperature sensor | ||
| Ignition system | ||
| Compression | ||
| Fuel injector assembly | ||
| Fuel injector circuit | ||
| Intake system | ||
| Throttle body with motor assembly | ||
| PCV hose (w/ secondary air injection system) | ||
| PCV hose (w/o secondary air injection system) | ||
| Starter signal circuit (w/o entry and start system) | ||
| Cranking holding function circuit (w/ entry and start system) | ||
| Difficult to start with cold engine | Ignition system | |
| Spark plug | ||
| Fuel pump control circuit | ||
| Fuel injector assembly | ||
| Difficult to start with warm engine | Fuel injector assembly | |
| Ignition system | ||
| Spark plug | ||
| Fuel pump control circuit | ||
| High engine idle speed | Electronic throttle control system | |
| A/C signal circuit (for automatic air conditioning system) | ||
| A/C signal circuit (for manual air conditioning system) | ||
| ECM power source circuit | ||
| Low engine idle speed (Poor idling) | Electronic throttle control system | |
| A/C signal circuit (for automatic air conditioning system) | ||
| A/C signal circuit (for manual air conditioning system) | ||
| Fuel pump control circuit | ||
| Intake system | ||
| PCV hose (w/ secondary air injection system) | ||
| PCV hose (w/o secondary air injection system) | ||
| Rough idling | Compression | |
| Spark plug | ||
| Fuel injector assembly | ||
| Ignition system | ||
| Fuel pump control circuit | ||
| Electronic throttle control system | ||
| Intake system | ||
| PCV hose (w/ secondary air injection system) | ||
| PCV hose (w/o secondary air injection system) | ||
| Mass air flow meter | ||
| Idle hunting | Electronic throttle control system | |
| Intake system | ||
| ECM power source circuit | ||
| Hesitation/poor acceleration | Fuel pump control circuit | |
| Spark plug | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Mass air flow meter | ||
| Electronic throttle control system | ||
| Intake system | ||
| Compression | ||
| Brake override system | ||
| Surging (Poor driveability) | Spark plug | |
| Fuel pump control circuit | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Mass air flow meter | ||
| Variable valve timing system | ||
| Compression | ||
| Engine stalls soon after starting | Fuel pump control circuit | |
| Spark plug | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Variable valve timing system | ||
| Electronic throttle control system | ||
| Intake system | ||
| PCV hose (w/ secondary air injection system) | ||
| PCV hose (w/o secondary air injection system) | ||
| Compression | ||
| Engine stalls only during A/C operation | A/C signal circuit (for automatic air conditioning system) | |
| A/C signal circuit (for manual air conditioning system) | ||
| ECM |