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 | Link |
|---|---|---|
| Engine does not crank (Does not start) | Battery | |
| Starter assembly (w/o Stop and Start System) | ||
| Starter assembly (for CVT models with Stop and Start System) | ||
| Starter assembly (for M/T models with Stop and Start System) | ||
| Starter signal circuit | ||
| Entry and Start System (for start function) (w/ Entry and Start System) | ||
| Stop and Start System (w/ Stop and Start System) | ||
| VC output circuit (ECM 5 V output) | ||
| Park/neutral position switch assembly (for CVT models) | ||
| Clutch start switch assembly (for M/T models) | ||
| No initial combustion (Does not start) | Immobiliser system (w/ Entry and Start System) | |
| Immobiliser system (w/o Entry and Start System) | ||
| ECM power source circuit | ||
| VC output circuit (ECM 5 V output) | ||
| Ignition system | ||
| Fuel pump control circuit | ||
| Fuel injector assembly | ||
| Crankshaft position sensor | ||
| Intake system | ||
| Valve timing (check for loose or jumped teeth on timing chain) | ||
| No. 1 valve rocker arm sub-assembly* | ||
| Engine cranks normally but difficult to start | ECM power source circuit | |
| Flow chart [Engine difficult to start] | ||
| Throttle body with motor assembly | ||
| Fuel pump (for high pressure side) | ||
| Fuel pump (for low pressure side) | ||
| Engine coolant temperature sensor | ||
| Fuel pump control circuit | ||
| Ignition system | ||
| Spark plug | ||
| Compression | ||
| Fuel injector assembly | ||
| Crankshaft position sensor | ||
| Intake system | ||
| Valve timing (check for loose or jumped teeth on timing chain) | ||
| No. 1 valve rocker arm sub-assembly* | ||
| Incomplete intermittent combustion occurs (Does not start) | Fuel pump control circuit | |
| Ignition system | ||
| Fuel injector assembly | ||
| Crankshaft position sensor | ||
| Intake system | ||
| Valve timing (check for loose or jumped teeth on timing chain) | ||
| High engine speed | Throttle body with motor assembly | |
| ECM power source circuit | ||
| PCV system | ||
| PCV valve | ||
| Low engine speed (Poor idle) | Fuel pump control circuit | |
| Throttle body with motor assembly | ||
| Fuel injector assembly | ||
| Fuel pump (for high pressure side) | ||
| PCV system | ||
| PCV valve | ||
| Intake system | ||
| No. 1 turbo pressure sensor | ||
| Electric water pump assembly | ||
| Rough idle | Flow chart [Rough idling] | |
| Throttle body with motor assembly | ||
| Fuel injector assembly | ||
| Fuel pump (for high pressure side) | ||
| Ignition system | ||
| Compression (engine mechanical) | ||
| Fuel pump control circuit | ||
| Spark plug | ||
| Intake system | ||
| Valve timing (check for loose or jumped teeth on timing chain) | ||
| No. 1 valve rocker arm sub-assembly* | ||
| No. 1 turbo pressure sensor | ||
| Electric water pump assembly | ||
| Hunting (Poor idle) | Throttle body with motor assembly | |
| ECM power source circuit | ||
| Fuel pump control circuit | ||
| Spark plug | ||
| Intake system | ||
| Electric water pump assembly | ||
| Hesitation/Poor acceleration (Poor driveability) | Fuel injector assembly | |
| Fuel pump control circuit | ||
| Fuel pump (for high pressure side) | ||
| Ignition system | ||
| Spark plug | ||
| Intake system | ||
| Valve timing (check for loose or jumped teeth on timing chain) | ||
| No. 1 turbo pressure sensor | ||
| Turbocharger system (intake system air leak, blockage, clogged) | ||
| Vacuum regulating valve assembly | ||
| Waste gate valve (turbocharger sub-assembly) | ||
| Waste gate valve actuator (turbocharger sub-assembly) | ||
| Air by-pass valve (turbocharger sub-assembly) | ||
| Turbocharger sub-assembly | ||
| Electric water pump assembly | ||
| No. 1 valve rocker arm sub-assembly* | ||
| Brake override system | ||
| Lack of power | Flow chart [Lack of power] | |
| Turbocharger system (intake system air leak, blockage, clogged) | ||
| Flow chart [Lack of power (turbocharger system)] | ||
| Vacuum regulating valve assembly | ||
| Waste gate valve (turbocharger sub-assembly) | ||
| Waste gate valve actuator (turbocharger sub-assembly) | ||
| Air by-pass valve (turbocharger sub-assembly) | ||
| Turbocharger sub-assembly | ||
| Surging (Poor driveability) | Fuel pump control circuit | |
| Spark plug | ||
| Fuel injector assembly | ||
| Electric water pump assembly | ||
| No. 1 valve rocker arm sub-assembly* | ||
| Engine stalls soon after starting | Flow chart [Engine stalls] | |
| Fuel pump control circuit | ||
| Throttle body with motor assembly | ||
| Crankshaft position sensor | ||
| Ignition system | ||
| Fuel pump (for high pressure side) | ||
| Intake system | ||
| Valve timing (check for loose or jumped teeth on timing chain) | ||
| No. 1 turbo pressure sensor | ||
| Electric water pump assembly | ||
| Shift solenoid valve SL (K313 CVT) (CVT models) | ||
| Engine stalls soon after slow down | Flow chart [Engine stalls] | |
| Fuel injector assembly | ||
| Throttle body with motor assembly | ||
| ECM | ||
| Crankshaft position sensor | ||
| Ignition system | ||
| Air by-pass valve (turbocharger sub-assembly) | ||
| White smoke emitted | Flow chart [Turbocharger oil leak and white smoke] | |
| Turbocharger noise | Flow chart [Turbocharger noise] |
Tech Tips
*: Check "Fuel Cut Elapsed Time" in the Data List. If the elapsed time is over 0 sec, then the engine speed is high (the engine speed at which fuel cut occurs + 500 rpm or higher). In this situation, there is a possibility that a No. 1 valve rocker arm sub-assembly will become loose and malfunction, check that the No. 1 valve rocker arm sub-assemblies are properly installed.