Brand:
Toyota
Model Name:
Yaris NCP90 91 92 93
Manual:
Repair Manual
Section:
1Nz-Fe Engine Control System
Title:
Sfi System
- HINT:
- 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 | Click here |
| Starter | Click here | |
| Cranking holding function circuit | Click here | |
| Starter relay | Click here | |
| Park/neutral position switch (A/T models only) | Click here | |
| Clutch start switch (M/T models only) | Click here | |
| No initial combustion (Does not Start) | ECM power source circuit | Click here |
| Crankshaft position sensor | Click here | |
| Camshaft position sensor | Click here | |
| Ignition system | Click here | |
| Fuel pump control circuit | Click here | |
| ECM | Click here | |
| VC output circuit | Click here | |
| Immobiliser system | Click here | |
| Engine cranks normally but difficult to start | Fuel pump control circuit | Click here |
| Compression | Click here | |
| Difficult to start with cold engine | Ignition system | Click here |
| Spark plug | Click here | |
| Fuel pump control circuit | Click here | |
| Injector | Click here | |
| Difficult to start with warm engine | Injector | Click here |
| Ignition system | Click here | |
| Spark plug | Click here | |
| Fuel pump control circuit | Click here | |
| High engine idling speed | Electronic throttle control system | Click here |
| A/C signal circuit | - | |
| ECM power source circuit | Click here | |
| Low engine idling speed (Poor idling) | Electronic throttle control system | Click here |
| A/C signal circuit | - | |
| Fuel pump control circuit | Click here | |
| Air induction system | Click here | |
| PCV hose | - | |
| Rough idling | Compression | Click here |
| Spark plug | Click here | |
| Injector | Click here | |
| Ignition system | Click here | |
| Fuel pump control circuit | Click here | |
| Electronic throttle control system | Click here | |
| Air induction system | Click here | |
| PCV hose | - | |
| Mass air flow meter | Click here | |
| Idle Hunting | Electronic throttle control system | Click here |
| Air induction system | Click here | |
| ECM power source circuit | Click here | |
| Hesitation/Poor acceleration | Fuel pump control circuit | Click here |
| Spark plug | Click here | |
| Ignition system | Click here | |
| Injector | Click here | |
| Mass air flow meter | Click here | |
| Electronic throttle control system | Click here | |
| Air induction system | Click here | |
| Compression | Click here | |
| Brake override system | Click here | |
| Surging (Poor driveability) | Spark plug | Click here |
| Fuel pump control circuit | Click here | |
| Ignition system | Click here | |
| Injector | Click here | |
| Mass air flow meter | Click here | |
| Variable valve timing system | Click here | |
| Compression | Click here | |
| Engine stalls soon after starting | Fuel pump control circuit | Click here |
| Spark plug | Click here | |
| Ignition system | Click here | |
| Injector | Click here | |
| Variable valve timing system | Click here | |
| Electronic throttle control system | Click here | |
| Air induction system | Click here | |
| PCV hose | - | |
| Compression | Click here | |
| Engine stalls only during A/C operation | A/C signal circuit | - |
| ECM | Click here |