Problem Symptoms Table
WARNING: This page is about a different car, the 2009 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
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
PROBLEM SYMPTOMS CHART
| Symptom | Suspected Area | See page |
|---|---|---|
| Engine does not crank (Does not start) | Immobilizer system | SYSTEM DESCRIPTION |
| Starter | INSPECTION | |
| STARTER relay | STARTER RELAY | |
| No initial combustion (Does not start) | ECM power source circuit | ECM POWER SOURCE CIRCUIT |
| Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| VC output circuit | VC OUTPUT CIRCUIT | |
| ECM | TERMINALS OF ECM | |
| Engine cranks normally but difficult to start | Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| Compression | ON-VEHICLE INSPECTION | |
| Difficult to start with cold engine | Starter signal circuit | DTC P0617 STARTER RELAY CIRCUIT HIGH |
| Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| Spark plug | ON-VEHICLE INSPECTION | |
| Ignition system | ON-VEHICLE INSPECTION | |
| Injector | INSPECTION | |
| Difficult to start with warm engine | Starter signal circuit | DTC P0617 STARTER RELAY CIRCUIT HIGH |
| Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| Spark plug | ON-VEHICLE INSPECTION | |
| Ignition system | ON-VEHICLE INSPECTION | |
| Injector | INSPECTION | |
| High engine idling speed (Poor idling) | A/C signal circuit (compressor circuit) | SYSTEM DIAGRAM |
| ECM power source circuit | ECM POWER SOURCE CIRCUIT | |
| Electronic throttle control system | THROTTLE BODY | |
| Air induction system | ON-VEHICLE INSPECTION | |
| PCV hose | ON-VEHICLE INSPECTION | |
| Low engine idling speed (Poor idling) | A/C signal circuit (compressor circuit) | SYSTEM DIAGRAM |
| Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| Electronic throttle control system | THROTTLE BODY | |
| Air induction system | ON-VEHICLE INSPECTION | |
| PCV hose | ON-VEHICLE INSPECTION | |
| Rough idling (Poor idling) | Compression | ON-VEHICLE INSPECTION |
| Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| Electronic throttle control system | THROTTLE BODY | |
| Air induction system | ON-VEHICLE INSPECTION | |
| PCV hose | ON-VEHICLE INSPECTION | |
| Mass air flow meter | MASS AIR FLOW METER | |
| Hunting (Poor idling) | ECM power source circuit | ECM POWER SOURCE CIRCUIT |
| Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT | |
| Spark plug | ON-VEHICLE INSPECTION | |
| Ignition system | ON-VEHICLE INSPECTION | |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| Injector | INSPECTION | |
| Electronic throttle control system | THROTTLE BODY | |
| Air induction system | ON-VEHICLE INSPECTION | |
| PCV hose | ON-VEHICLE INSPECTION | |
| Hesitation/Poor acceleration (Poor driveability) | Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT |
| A/T faulty | HOW TO PROCEED WITH TROUBLESHOOTING | |
| Spark plug | ON-VEHICLE INSPECTION | |
| Ignition system | ON-VEHICLE INSPECTION | |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| Injector | INSPECTION | |
| Mass air flow meter | MASS AIR FLOW METER | |
| Surging (Poor driveability) | Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT |
| Spark plug | ON-VEHICLE INSPECTION | |
| Ignition system | ON-VEHICLE INSPECTION | |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| Injector | INSPECTION | |
| Mass air flow meter | MASS AIR FLOW METER | |
| Engine stalls soon after starting | Fuel pump control circuit | FUEL PUMP CONTROL CIRCUIT |
| Spark plug | ON-VEHICLE INSPECTION | |
| Ignition system | ON-VEHICLE INSPECTION | |
| Fuel injector circuit | FUEL INJECTOR CIRCUIT | |
| Injector | INSPECTION | |
| Engine stalls during A/C operation | A/C signal circuit (Compressor circuit) | SYSTEM DIAGRAM |
| ECM | TERMINALS OF ECM | |
| Unable/difficult to refuel | Refueling valve (canister) | INSPECTION |