Problem Symptoms Table
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.
SFI SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Engine does not crank (Does not start) | Battery | Refer to ON-VEHICLE INSPECTION - Step 1 |
| Starter signal circuit | Refer to Starter Signal Circuit | |
| Smart access system with push button start | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| VC output circuit (ECM 5 V output) | Refer to VC Output Circuit | |
| Starter assembly | Refer to INSPECTION | |
| No initial combustion (Does not start) | Immobilizer system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| VC output circuit (ECM 5 V output) | Refer to VC Output Circuit | |
| Crankshaft position sensor | Refer to INSPECTION | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| Engine cranks normally but difficult to start | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Fuel pump | Refer to INSPECTION | |
| Engine coolant temperature sensor | Refer to INSPECTION | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector assembly | Refer to INSPECTION | |
| Compression | Refer to ON-VEHICLE INSPECTION - Step 11 | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| Intake system | Refer to ON-VEHICLE INSPECTION | |
| Throttle with motor body assembly | Refer to ON-VEHICLE INSPECTION | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Incomplete intermittent combustion occurs (Does not start) | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Fuel pump | Refer to INSPECTION | |
| Fuel line | - | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector assembly | Refer to INSPECTION | |
| Crankshaft position sensor | Refer to INSPECTION | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| High engine speed (Poor idle) | Air conditioning signal circuit | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Throttle with motor body assembly | Refer to ON-VEHICLE INSPECTION | |
| Throttle with motor body assembly control | - | |
| Engine coolant temperature sensor | Refer to INSPECTION | |
| PCV hose | Refer to ON-VEHICLE INSPECTION | |
| PCV system | Refer to ON-VEHICLE INSPECTION | |
| ACIS control circuit | Refer to ACIS Control Circuit | |
| Low engine speed (Poor idle) | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Throttle with motor body assembly | Refer to ON-VEHICLE INSPECTION | |
| Throttle with motor body assembly control | - | |
| Intake system | Refer to ON-VEHICLE INSPECTION | |
| ACIS control circuit | Refer to ACIS Control Circuit | |
| PCV hose | Refer to ON-VEHICLE INSPECTION | |
| PCV system | Refer to ON-VEHICLE INSPECTION | |
| Engine stalls on deceleration | Idle speed (refer to "Low engine speed") | Refer to ON-VEHICLE INSPECTION - Step 10 |
| Rough idle | Compression (engine mechanical) | Refer to ON-VEHICLE INSPECTION - Step 11 |
| Air fuel ratio sensor | Refer to INSPECTION | |
| Heated oxygen sensor | Refer to INSPECTION | |
| Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Air conditioning signal circuit | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Fuel line | - | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| Fuel pump | Refer to INSPECTION | |
| Intake system | Refer to ON-VEHICLE INSPECTION | |
| ACIS control circuit | Refer to ACIS Control Circuit | |
| PCV hose | Refer to ON-VEHICLE INSPECTION | |
| PCV system | Refer to ON-VEHICLE INSPECTION | |
| Hunting (Poor idle) | PCV hose | Refer to ON-VEHICLE INSPECTION |
| PCV system | Refer to ON-VEHICLE INSPECTION | |
| Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION | |
| Air fuel ratio sensor | Refer to INSPECTION | |
| ACIS control circuit | Refer to ACIS Control Circuit | |
| Engine stalls during air conditioning operation | Air conditioning signal circuit (compressor circuit) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| ECM | Refer to REMOVAL | |
| Hesitation/Poor acceleration (Poor driveability) | Fuel line | - |
| Fuel pump | Refer to INSPECTION | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION | |
| Throttle with motor body assembly | Refer to ON-VEHICLE INSPECTION | |
| Knock control sensor | Refer to INSPECTION | |
| Air intake control circuit | Refer to Air Intake Control Circuit | |
| Brake override system | Refer to Brake Override System | |
| Surging (Poor driveability) | Fuel line | - |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Fuel pump | Refer to INSPECTION | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector assembly | Refer to INSPECTION | |
| Engine stalls soon after starting | Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION |
| Intake system | Refer to ON-VEHICLE INSPECTION | |
| Fuel line | - | |
| Unable/difficult to refuel | Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) | - |
| Engine vibrates frequently when idling (Active control engine mount system) | Active control engine mount circuit | Refer to Active Control Engine Mount System |