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 | ||
| Entry and start system | ||
| ST relay | ||
| Park/neutral position switch | ||
| Immobiliser system | ||
| No initial combustion (Does not Start) | ECM power source circuit | |
| Crankshaft position sensor | ||
| Camshaft position sensor | ||
| Ignition system | ||
| Fuel pump control circuit | ||
| Fuel injector circuit | ||
| Valve timing | ||
| ECM | ||
| VC output circuit | ||
| Engine cranks normally but difficult to start | Fuel pump control circuit | |
| Fuel injector circuit | ||
| Engine coolant temperature sensor | ||
| Ignition system | ||
| Throttle body | ||
| Starter signal circuit | ||
| Compression | ||
| High engine idling speed (Poor idling) | Throttle body | |
| A/C signal circuit | ||
| ECM power source circuit | ||
| Engine coolant temperature sensor | ||
| PCV valve | ||
| PCV hose | ||
| Low engine idling speed (Poor idling) | Throttle body | |
| Fuel pump control circuit | ||
| Air induction system | ||
| PCV valve | ||
| PCV hose | ||
| Engine stalls on deceleration | Idle speed (refer to "Low engine speed" symptom) | |
| Rough idling | Compression | |
| Fuel line | - | |
| Fuel injector circuit | ||
| Ignition system | ||
| Fuel pump control circuit | ||
| Throttle body | ||
| Air induction system | ||
| PCV valve | ||
| PCV hose | ||
| Mass air flow meter | ||
| Idle hunting | Throttle body | |
| Air induction system | ||
| Mass air flow meter | ||
| PCV valve | ||
| PCV hose | ||
| Hesitation/poor acceleration | Fuel pump control circuit | |
| Fuel line | - | |
| Ignition system | ||
| Fuel injector circuit | ||
| Mass air flow meter | ||
| Throttle body | ||
| Air induction system | ||
| Valve timing | ||
| Compression | ||
| Surging (Poor driveability) | Fuel line | - |
| Fuel pump control circuit | ||
| Ignition system | ||
| Fuel injector circuit | ||
| Mass air flow meter | ||
| Compression | ||
| Engine stalls soon after starting | Fuel pump control circuit | |
| Fuel line | - | |
| Ignition system | ||
| Fuel injector circuit | ||
| Mass air flow meter | ||
| Throttle body | ||
| Air induction system | ||
| PCV valve | ||
| PCV hose | ||
| Compression | ||
| Engine stalls only during A/C operation | A/C signal circuit | |
| ECM |