Tech Tips
Use the table below to help determine the cause of the problem. 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) | Entry and start system | |
| Immobiliser system | ||
| ECM power source circuit | ||
| VC output circuit | ||
| Hybrid system | ||
| No initial combustion (Does not start) | ECM power source circuit | |
| Crankshaft position sensor | ||
| Fuel pump control circuit | ||
| Ignition system | ||
| ECM | ||
| Engine cranks normally but difficult to start | Fuel pump control circuit | |
| Fuel pump (for High Pressure) | ||
| Compression | ||
| Difficult to start with cold engine | Ignition system | |
| Spark plug | ||
| Fuel pump control circuit | ||
| Fuel pump (for High Pressure) | ||
| Fuel injector (for Direct Injection) | ||
| Fuel injector (for Port Injection) | ||
| Difficult to start with warm engine | Fuel injector (for Port Injection) | |
| Fuel injector (for Direct Injection) | ||
| Ignition system | ||
| Spark plug | ||
| Fuel pump control circuit | ||
| Fuel pump (for High Pressure) | ||
| High engine idle speed (Poor idling) | ECM power source circuit | |
| A/C signal circuit | ||
| Electronic throttle control system | ||
| Air induction system | ||
| PCV valve and hose | ||
| Low engine idle speed (Poor idling) | A/C signal circuit | |
| Fuel pump control circuit | ||
| Fuel pump (for High Pressure) | ||
| Electronic throttle control system | ||
| Air induction system | ||
| PCV valve and hose | ||
| Rough idling (Poor idling) | Compression | |
| Fuel pump control circuit | ||
| Fuel pump (for High Pressure) | ||
| Electronic throttle control system | ||
| Air induction system | ||
| PCV valve and hose | ||
| Hunting (Poor idling) | ECM power source circuit | |
| Fuel pump control circuit | ||
| Fuel pump (for High Pressure) | ||
| Spark plug | ||
| Ignition system | ||
| Fuel injector (for Port Injection) | ||
| Fuel injector (for Direct Injection) | ||
| Electronic throttle control system | ||
| Air induction system | ||
| PCV valve and hose | ||
| Hesitation/Poor acceleration (Poor driveability) | Fuel pump control circuit | |
| Fuel pump (for High Pressure) | ||
| Spark plug | ||
| Ignition system | ||
| Fuel injector (for Port Injection) | ||
| Fuel injector (for Direct Injection) | ||
| Surging (Poor driveability) | Spark plug | |
| Fuel pump control circuit | ||
| Fuel pump (for High Pressure) | ||
| Ignition system | ||
| Fuel injector (for Port Injection) | ||
| Fuel injector (for Direct Injection) | ||
| Engine stalls soon after starting | Fuel pump control circuit | |
| Fuel pump (for High Pressure) | ||
| Spark plug | ||
| Ignition system | ||
| Fuel injector (for Port Injection) | ||
| Fuel injector (for Direct Injection) | ||
| Engine stalls during A/C operation | A/C signal circuit | |
| ECM |