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 Test |
|---|---|---|
| Engine does not crank (Does not start) | Battery | Refer to ON-VEHICLE INSPECTION - Step 1 |
| VC output circuit (ECM 5 V output) | Refer to VC Output Circuit | |
| Starter signal circuit | Refer to Starter Signal Circuit | |
| Smart key system | Refer to PROBLEM SYMPTOMS TABLE | |
| Starter assembly | Refer to INSPECTION | |
| No initial combustion (Does not start) | Immobiliser system | Refer to PROBLEM SYMPTOMS TABLE |
| 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 | |
| VVT sensor (for intake camshaft) | Refer to INSPECTION PROCEDURE | |
| VVT sensor (for exhaust camshaft) | Refer to INSPECTION PROCEDURE | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector circuit | Refer to Fuel Injector Circuit | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| Starter signal circuit | Refer to Starter Signal Circuit | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| ECM | Refer to REMOVAL | |
| Engine cranks normally but difficult to start | 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 body with motor assembly | Refer to ON-VEHICLE INSPECTION | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Starter signal circuit | Refer to Starter Signal Circuit | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Incomplete intermittent combustion occurs (Does not start) | 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 | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| High engine speed | Air conditioning signal circuit | Refer to PROBLEM SYMPTOMS TABLE |
| Throttle body with motor assembly | Refer to ON-VEHICLE INSPECTION | |
| Engine coolant temperature sensor | Refer to INSPECTION | |
| PCV valve and hose | Refer to COMPONENTS | |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| ACIS control circuit | Refer to ACIS Control Circuit | |
| Low engine speed (Poor idle) | Throttle body with motor assembly | Refer to ON-VEHICLE INSPECTION |
| Intake system | Refer to ON-VEHICLE INSPECTION | |
| ACIS control circuit | Refer to ACIS Control Circuit | |
| PCV valve and hose | Refer to COMPONENTS | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Engine stalls on deceleration | Idle speed (refer to "Low engine speed") | - |
| 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 PROBLEM SYMPTOMS TABLE | |
| Fuel line | - | |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| Intake system | Refer to ON-VEHICLE INSPECTION | |
| ACIS control circuit | Refer to ACIS Control Circuit | |
| PCV valve and hose | Refer to COMPONENTS | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| External part malfunction (Increase in load: A/C system, A/T system, etc.) | - | |
| Hunting (Poor idle) | PCV valve and hose | Refer to COMPONENTS |
| 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 | Refer to PROBLEM SYMPTOMS TABLE |
| ECM | Refer to REMOVAL | |
| Hesitation/Poor acceleration (Poor driveability) | Fuel line | - |
| Valve timing | Refer to PROCEDURE - Step 4 | |
| Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION | |
| Throttle body with motor assembly | Refer to ON-VEHICLE INSPECTION | |
| Knock control sensor | Refer to INSPECTION | |
| Air intake control circuit | Refer to Air Intake Control Circuit | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Brake override system | Refer to Brake Override System | |
| Surging (Poor driveability) | Fuel line | - |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel injector assembly | Refer to INSPECTION | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| 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 |
| Drive mode does not change | Drive mode switch circuit | Refer to PROBLEM SYMPTOMS TABLE |