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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine does not crank (does not start) | Immobiliser system | |
| Entry and start system | ||
| Battery | ||
| VC output circuit (ECM 5 V circuit) | ||
| Starter signal circuit | ||
| Starter assembly | ||
| 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 | ||
| ECM power source circuit | ||
| Incomplete intermittent combustion occurs (does not start) | Fuel pump control circuit | |
| Fuel pump | ||
| Fuel lines | - | |
| Ignition system | ||
| Fuel injector assembly | ||
| Crankshaft position sensor | ||
| Valve timing | ||
| High engine speed (poor idle) | Air conditioning signal circuit | |
| Throttle body assembly | ||
| Throttle body control | ||
| Engine coolant temperature sensor | ||
| PCV hose | ||
| PCV system | ||
| ECM power source circuit | ||
| Acoustic Control Induction System (ACIS) | ||
| Low engine speed (poor idle) | Fuel pump control circuit | |
| Throttle body assembly | ||
| Throttle body control | ||
| Intake system | ||
| Acoustic Control Induction System (ACIS) | ||
| PCV hose | ||
| PCV system | ||
| Engine stalls on deceleration | Idle speed (refer to "Low engine speed" symptom) | |
| Rough idle | Compression (engine mechanical) | |
| Air fuel ratio sensor | ||
| Mass air flow meter sub-assembly | ||
| Ignition system | ||
| Air conditioning signal circuit | ||
| Fuel lines | - | |
| Fuel pump | ||
| Intake system | ||
| Acoustic Control Induction System (ACIS) | ||
| PCV hose | ||
| PCV system | ||
| Tumble Control Valve (TCV) | ||
| Hunting (poor idle) | PCV hose | |
| PCV system | ||
| Mass air flow meter sub-assembly | ||
| Air fuel ratio sensor | ||
| Acoustic Control Induction System (ACIS) | ||
| Engine stalls during air conditioning operation | Air conditioning signal circuit | |
| ECM | ||
| Hesitation/Poor acceleration (poor drivability) | Fuel lines | - |
| Fuel pump | ||
| Valve timing | ||
| Mass air flow meter sub-assembly | ||
| Throttle body assembly | ||
| Knock control sensor | ||
| Tumble Control Valve (TCV) | ||
| Brake override system | ||
| Surging (poor drivability) | Fuel lines | - |
| Fuel pump control circuit | ||
| Fuel pump | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Engine stalls soon after starting | Mass air flow meter sub-assembly | |
| Intake system | ||
| Fuel lines | - |