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
| Symptom | Suspected Area | See |
|---|---|---|
| Engine does not crank (Does not start) | 1. Immobilizer System | Refer to PROBLEM SYMPTOMS TABLE |
| 2. ECM power source circuit | Refer to ECM Power Source Circuit | |
| 3. VC output circuit (ECM 5 V output) | Refer to VC Output Circuit | |
| 4. Cranking holding function circuit | Refer to Cranking Holding Function Circuit | |
| 5. Starter | Refer to INSPECTION | |
| No initial combustion (Does not start) | 1. ECM power source circuit | Refer to ECM Power Source Circuit |
| 2. VC output circuit (ECM 5 V output) | Refer to VC Output Circuit | |
| 3. Crankshaft position sensor | Refer to INSPECTION | |
| 4. Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| 5. Ignition system | Refer to ON-VEHICLE INSPECTION | |
| 6. Fuel injector circuit | Refer to DTC P0200: Injector Circuit/Open; DTC P0201: Injector Circuit/Open - (Cylinder 1); DTC P0202: Injector Circuit/Open - (Cylinder 2); DTC P0203: Injector Circuit/Open - (Cylinder 3); DTC P0204: Injector Circuit/Open - (Cylinder 4); DTC P0205: Injector Circuit/Open - (Cylinder 5); DTC P0206: Injector Circuit/Open - (Cylinder 6); DTC P12FF: Electric Driver Unit | |
| 7. Valve timing | Refer to PROCEDURE - Step 4 | |
| Engine cranks normally but difficult to start | 1. Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| 2. Fuel pump for high pressure | Refer to ON-VEHICLE INSPECTION | |
| 3. Engine coolant temperature sensor | Refer to INSPECTION | |
| 4. Ignition system | Refer to ON-VEHICLE INSPECTION | |
| 5. Fuel injector circuit | Refer to DTC P0200: Injector Circuit/Open; DTC P0201: Injector Circuit/Open - (Cylinder 1); DTC P0202: Injector Circuit/Open - (Cylinder 2); DTC P0203: Injector Circuit/Open - (Cylinder 3); DTC P0204: Injector Circuit/Open - (Cylinder 4); DTC P0205: Injector Circuit/Open - (Cylinder 5); DTC P0206: Injector Circuit/Open - (Cylinder 6); DTC P12FF: Electric Driver Unit | |
| 6. Air induction system | - | |
| 7. Throttle body assembly | Refer to INSPECTION | |
| 8. Cold start injector circuit | Refer to Cold Start Injector Circuit | |
| 9. ECM power source circuit | Refer to ECM Power Source Circuit | |
| Incomplete intermittent combustion occurs (Does not start) | 1. Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| 2. Fuel pump for high pressure | Refer to ON-VEHICLE INSPECTION | |
| 3. Fuel line | Refer to SYSTEM DIAGRAM | |
| 4. Ignition system | Refer to ON-VEHICLE INSPECTION | |
| 5. Fuel injector circuit | Refer to DTC P0200: Injector Circuit/Open; DTC P0201: Injector Circuit/Open - (Cylinder 1); DTC P0202: Injector Circuit/Open - (Cylinder 2); DTC P0203: Injector Circuit/Open - (Cylinder 3); DTC P0204: Injector Circuit/Open - (Cylinder 4); DTC P0205: Injector Circuit/Open - (Cylinder 5); DTC P0206: Injector Circuit/Open - (Cylinder 6); DTC P12FF: Electric Driver Unit | |
| 6. Crankshaft position sensor | Refer to INSPECTION | |
| 7. Valve timing | Refer to PROCEDURE - Step 4 | |
| High engine speed (Poor idling) | 1. Air conditioning signal circuit | Refer to PROBLEM SYMPTOMS TABLE |
| 2. Throttle body assembly | Refer to INSPECTION | |
| 3. Throttle body assembly control | Refer to ON-VEHICLE INSPECTION | |
| 4. Engine coolant temperature sensor | Refer to INSPECTION | |
| 5. PCV hose | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| 6. PCV system | Refer to INSPECTION | |
| 7. ACIS control circuit | Refer to ACIS Control Circuit | |
| Low engine speed (Poor idling) | 1. Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| 2. Throttle body assembly | Refer to INSPECTION | |
| 3. Throttle body assembly control | Refer to ON-VEHICLE INSPECTION | |
| 4. Air induction system | - | |
| 5. ACIS control circuit | Refer to ACIS Control Circuit | |
| 6. PCV hose | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| 7. PCV system | Refer to INSPECTION | |
| Engine stalls on deceleration | 1. Idle speed (refer to "Low engine speed") | Refer to ON-VEHICLE INSPECTION |
| Rough idling | 1. Compression (engine mechanical) | Refer to ON-VEHICLE INSPECTION - Step 9 |
| 2. Air fuel ratio sensor | Refer to ON-VEHICLE INSPECTION | |
| 3. Heated oxygen sensor | Refer to ON-VEHICLE INSPECTION | |
| 4. Mass air flow meter | Refer to ON-VEHICLE INSPECTION | |
| 5. Ignition system | Refer to ON-VEHICLE INSPECTION | |
| 6. Air conditioning signal circuit | Refer to PROBLEM SYMPTOMS TABLE | |
| 7. Fuel line | Refer to SYSTEM DIAGRAM | |
| 8. Valve timing | Refer to PROCEDURE - Step 4 | |
| 9. Fuel pump for low or high pressure | Refer to ON-VEHICLE INSPECTION | |
| 10. Air induction system | - | |
| 11. ACIS control circuit | Refer to ACIS Control Circuit | |
| 12. PCV hose | Refer to ON-VEHICLE INSPECTION - Step 1 | |
| 13. PCV system | Refer to INSPECTION | |
| Hunting (Poor idling) | 1. PCV hose | Refer to ON-VEHICLE INSPECTION - Step 1 |
| 2. PCV system | Refer to INSPECTION | |
| 3. Mass air flow meter | Refer to ON-VEHICLE INSPECTION | |
| 4. Air fuel ratio sensor | Refer to ON-VEHICLE INSPECTION | |
| 5. ACIS control circuit | Refer to ACIS Control Circuit | |
| Engine stalls during air conditioning operation | 1. Air conditioning signal circuit (Compressor circuit) | Refer to PROBLEM SYMPTOMS TABLE |
| 2. ECM | Refer to REMOVAL | |
| 3. Cold start injector circuit | Refer to Cold Start Injector Circuit | |
| Hesitation/ Poor acceleration (Poor driveability) | 1. Fuel line | Refer to SYSTEM DIAGRAM |
| 2. Fuel pump for low or high pressure | Refer to ON-VEHICLE INSPECTION | |
| 3. Valve timing | Refer to PROCEDURE - Step 4 | |
| 4. Mass air flow meter | Refer to ON-VEHICLE INSPECTION | |
| 5. Throttle body assembly | Refer to INSPECTION | |
| 6. Knock control sensor | Refer to INSPECTION | |
| 7. Brake override system | Refer to Brake Override System | |
| Surging (Poor driveability) | 1. Fuel line | Refer to SYSTEM DIAGRAM |
| 2. Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| 3. Fuel pump for high pressure | Refer to ON-VEHICLE INSPECTION | |
| 4. Ignition system | Refer to ON-VEHICLE INSPECTION | |
| 5. Fuel injector assembly | Refer to INSPECTION | |
| Engine stalls soon after starting | 1. Mass air flow meter | Refer to ON-VEHICLE INSPECTION |
| 2. Air induction system | - | |
| 3. Fuel line | Refer to SYSTEM DIAGRAM | |
| 4. Cold start injector circuit | Refer to Cold Start Injector Circuit | |
| Unable/difficult refuel | Refueling valve (canister) | Refer to INSPECTION |