Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Uz-Fe Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190
Sfi System -- Problem Symptoms Table |
- HINT:
- Use the table below to help determine the cause of the problem symptom. The potential cases 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) | - Starter | Click here |
| - STARTER relay | Click here | |
| - Engine Switch | Click here | |
| No initial combustion (does not start) | - ECM power source circuit | Click here |
| - Fuel pump control circuit | Click here | |
| - ECM | Click here | |
| Engine cranks normally (difficult to start) | - Fuel pump control circuit | Click here |
| - Compression | Click here | |
| Cold engine (difficult to start) | - Starter signal circuit | Click here |
| - Fuel pump control circuit | Click here | |
| - Spark plug | Click here | |
| - Ignition system | Click here | |
| - Injector | Click here | |
| Hot engine (difficult to start) | - Starter signal circuit | Click here |
| - Fuel pump control circuit | Click here | |
| - Spark plug | Click here | |
| - Ignition system | Click here | |
| - Injector | Click here | |
| High engine idle speed | - A/C signal circuit (compressor circuit) | Click here |
| - ECM power source circuit | Click here | |
| - Electronic throttle control system | Click here | |
| - Air induction system | Click here | |
| - PCV hose | - | |
| Low engine idle speed | - A/C signal circuit (compressor circuit) | Click here |
| - Fuel pump control circuit | Click here | |
| - Electronic throttle control system | Click here | |
| - Air induction system | Click here | |
| - PCV hose | - | |
| Rough idling | - Compression | Click here |
| - Fuel pump control circuit | Click here | |
| - Electronic throttle control system | Click here | |
| - Air induction system | Click here | |
| - PCV hose | - | |
| Hunting (when idling) | - ECM power source circuit | Click here |
| - Fuel pump control circuit | Click here | |
| - Spark plug | Click here | |
| - Ignition system | Click here | |
| - Injector | Click here | |
| - Electronic throttle control system | Click here | |
| - Air induction system | Click here | |
| - PCV hose | - | |
| Hesitation/Poor acceleration (poor driveability) | - Fuel pump control circuit | Click here |
| - A/T faulty | Click here | |
| - Spark plug | Click here | |
| - Ignition system | Click here | |
| - Injector | Click here | |
| Surging (poor driveability) | - Fuel pump control circuit | Click here |
| - Spark plug | Click here | |
| - Ignition system | Click here | |
| - Injector | Click here | |
| Engine stalls soon after starting | - Fuel pump control circuit | Click here |
| - Spark plug | Click here | |
| - Ignition system | Click here | |
| - Injector | Click here | |
| Engine stalls during A/C operation | - A/C signal circuit (compressor circuit) | Click here |
| - ECM | Click here | |
| Unable/difficult to refuel | - Refueling valve (canister) | - |