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.
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) | Battery | |
| Starter assembly (for 1.4 kW Type) | ||
| Starter assembly (for 2.0 kW Type) | ||
| Smart entry and start system (for Start function) | ||
| Park/neutral position switch assembly (for Automatic Transmission Models) | ||
| Clutch start switch assembly (for Manual Transmission Models) | ||
| VC output circuit (ECM 5 V circuit) | ||
| Starter signal circuit | ||
| ECM power source circuit | ||
| No initial combustion (Does not start) | Immobiliser system (w/ Entry and Start System) | |
| Immobiliser system (w/o Entry and Start System) | ||
| VC output circuit (ECM 5 V output) | ||
| ECM power source circuit | ||
| Crankshaft position sensor | ||
| Camshaft position sensor (for Intake Side) | ||
| Camshaft position sensor (for Exhaust Side) | ||
| Valve timing | ||
| Ignition system | ||
| Fuel pump control circuit | ||
| Fuel injector circuit | ||
| Starter signal circuit | ||
| Engine cranks normally but has difficulty in start | Engine 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 valve and hose | ||
| Starter signal circuit | ||
| ECM power source circuit | ||
| Incomplete intermittent combustion occurs (Does not start) | Fuel pump control circuit | |
| Fuel pump (for 3 Door) | ||
| Fuel pump (for 5 Door) | ||
| Fuel line | - | |
| Ignition system | ||
| Fuel injector circuit | ||
| ECM power source circuit | ||
| Starter signal circuit | ||
| Crankshaft position sensor | ||
| Camshaft position sensor (for Intake Side) | ||
| Camshaft position sensor (for Exhaust Side) | ||
| Valve timing | ||
| High engine speed | Throttle body with motor assembly | |
| Intake system | ||
| A/C signal circuit (for Automatic Air Conditioning System) | ||
| A/C signal circuit (for Manual Air Conditioning System) | ||
| ECM power source circuit | ||
| Engine coolant temperature sensor | ||
| PCV valve and hose | ||
| Low engine speed (Poor idle) | Throttle body with motor assembly | |
| A/C signal circuit (for Automatic Air Conditioning System) | ||
| A/C signal circuit (for Manual Air Conditioning System) | ||
| Fuel pump control circuit | ||
| Fuel pump (for 3 Door) | ||
| Fuel pump (for 5 Door) | ||
| Intake system | ||
| PCV valve and hose | ||
| Engine stalls on deceleration | Engine stalls | |
| Idle speed (refer to "Low engine speed" symptom) | - | |
| Rough idle | Rough idling | |
| Compression | ||
| Ignition system | ||
| Spark plug | ||
| Fuel injector circuit | ||
| ECM power source circuit | ||
| Fuel pump control circuit | ||
| Fuel pump (for 3 Door) | ||
| Fuel pump (for 5 Door) | ||
| Fuel line | - | |
| Throttle body with motor assembly | ||
| Intake system | ||
| Purge VSV | ||
| PCV valve and hose | ||
| Air fuel ratio sensor | ||
| Mass air flow meter sub-assembly | ||
| Knock control sensor | ||
| Hunting (Poor idle) | Electronic throttle control system | |
| Intake system | ||
| ECM power source circuit | ||
| Hesitation and/or poor acceleration (Poor driveability) | Fuel pump control circuit | |
| Spark plug | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Mass air flow meter sub-assembly | ||
| 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 sub-assembly | ||
| Variable Valve Timing (VVT) system | ||
| Compression | ||
| Engine stalls soon after starting | Immobiliser system (w/ Entry and Start System) | |
| Immobiliser system (w/o Entry and Start System) | ||
| Fuel pump control circuit | ||
| Spark plug | ||
| Ignition system | ||
| Fuel injector assembly | ||
| Variable Valve Timing (VVT) system | ||
| Electronic throttle control system | ||
| Intake system | ||
| PCV valve and hose | ||
| Compression | ||
| Lack of power | Lack of power | |
| Brake override system | ||
| 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 | ||
| MIL (malfunction indicator lamp) malfunction | MIL Circuit | |
| Meter/Gauge system | ||
| Engine stalls when starting off | Automatic transmission system | |
| Engine stalls | ||
| Unable/difficult to refuel | Fuel system (canister, roll over valve, fuel tank etc.) | - |
Tech Tips
*: Check the "Fuel Cut Elps Time" in the Data List.
If the elapsed time is over 0 sec, then the engine speed is high (More than the engine speed at which fuel cut occurs + 500 rpm).
When this has happened, there is the possibility that the valve rocker arm will become loose and malfunction, so check that the No. 1 valve rocker arm sub-assembly is properly attached Click here.