Problem Symptoms Table
HINT:
Use the table below to help determine the cause of the problem. 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.
SFI SYSTEM
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See |
|---|---|---|
| Engine does not crank (Does not start) | 1. Check push-start function initialization | INITIALIZATION |
| 2. Immobilizer System | PROBLEM SYMPTOMS TABLE | |
| 3. ECM power source circuit | ECM POWER SOURCE CIRCUIT | |
| 4. VC out put circuit | VC OUTPUT CIRCUIT | |
| 5. Cranking holding function circuit | CRANKING HOLDING FUNCTION CIRCUIT | |
| 6. Starter | STARTER | |
| No initial combustion (Does not start) | 1. ECM power source circuit | ECM POWER SOURCE CIRCUIT |
| 2. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| 3. ECM | TERMINALS OF ECM | |
| Engine cranks normally but difficult to start | 1. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT |
| 2. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| 3. Compression | ON-VEHICLE INSPECTION | |
| Difficult to start with cold engine | 1. Cranking holding function circuit | CRANKING HOLDING FUNCTION CIRCUIT |
| 2. Ignition system | ON-VEHICLE INSPECTION | |
| 3. Spark plug | ON-VEHICLE INSPECTION | |
| 4. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| 5. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| 6. Fuel injector for direct injection | INSPECTION | |
| 7. Fuel injector for port injection | INSPECTION | |
| Difficult to start with worm engine | 1. Cranking holding function circuit | CRANKING HOLDING FUNCTION CIRCUIT |
| 2. Fuel injector for port injection | INSPECTION | |
| 3. Fuel injector for direct injection | INSPECTION | |
| 4. Ignition system | ON-VEHICLE INSPECTION | |
| 5. Spark plug | ON-VEHICLE INSPECTION | |
| 6. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| 7. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| High engine idle speed (Poor idling) | 1. ECM power source circuit | ECM POWER SOURCE CIRCUIT |
| 2. A/C signal circuit (compressor circuit) | - | |
| 3. Electronic throttle control system | ON-VEHICLE INSPECTION | |
| 4. Air induction system | - | |
| 5. PCV hose | ON-VEHICLE INSPECTION | |
| Low engine idle speed (Poor idling) | 1. A/C signal circuit (compressor circuit) | AIR CONDITIONING COMPRESSOR MAGNETIC CLUTCH CIRCUIT |
| 2. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| 3. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| 4. Electronic throttle control system | ON-VEHICLE INSPECTION | |
| 5. Air induction system | - | |
| 6. PCV hose | ON-VEHICLE INSPECTION | |
| Rough idling (Poor idling) | 1. Compression | ON-VEHICLE INSPECTION |
| 2. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| 3. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| 4. Electronic throttle control system | ON-VEHICLE INSPECTION | |
| 5. Air induction system | - | |
| 6. PCV hose | ON-VEHICLE INSPECTION | |
| Hunting (Poor idling) | 1. ECM power source circuit | ECM POWER SOURCE CIRCUIT |
| 2. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| 3. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| 4. Spark plug | ON-VEHICLE INSPECTION | |
| 5. Ignition system | ON-VEHICLE INSPECTION | |
| 6. Fuel injector for port injection | ON-VEHICLE INSPECTION | |
| 7. Fuel injector for direct injection | INSPECTION | |
| 8. Electronic throttle control system | ON-VEHICLE INSPECTION | |
| 9. Air induction system | - | |
| 10. PCV hose | ON-VEHICLE INSPECTION | |
| Hesitation / Poor acceleration (Poor driveability) | 1. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT |
| 2. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| 3. Spark plug | ON-VEHICLE INSPECTION | |
| 4. Ignition system | ON-VEHICLE INSPECTION | |
| 5. Fuel injector for port injection | INSPECTION | |
| 6. Fuel injector for direct injection | INSPECTION | |
| Surging (Poor driveability) | 1. Spark plug | ON-VEHICLE INSPECTION |
| 2. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| 3. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| 4. Ignition system | ON-VEHICLE INSPECTION | |
| 5. Fuel injector for port injection | INSPECTION | |
| 6. Fuel injector for direct injection | INSPECTION | |
| Engine stalls soon after starting | 1. Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT |
| 2. Fuel pump for high pressure | ON-VEHICLE INSPECTION | |
| 3. Spark plug | ON-VEHICLE INSPECTION | |
| 4. Ignition system | ON-VEHICLE INSPECTION | |
| 5. Fuel injector for port injection | INSPECTION | |
| 6. Fuel injector for direct injection | INSPECTION | |
| Engine stalls during A/C operation | 1. A/C signal circuit (Compressor circuit) | AIR CONDITIONING COMPRESSOR MAGNETIC CLUTCH CIRCUIT |
| 2. ECM | TERMINALS OF ECM | |
| Unable/difficult refuel | 1. Refueling valve (canister) | - |