Problem Symptoms Table
HINT:
When a malfunction is not confirmed by a DTC (Diagnostic Trouble Code) check and the cause of problem cannot be identified through a basic inspection, troubleshoot according to the priority order indicated in the table below.
SFI SYSTEM
| Symptom | Suspected Area | Reference |
|---|---|---|
| Engine does not crank (does not start) | Immobilizer system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING |
| Starter | Refer to INSPECTION | |
| STARTER Relay | Refer to ON-VEHICLE INSPECTION | |
| Cranking holding function circuit | Refer to Cranking Holding Function Circuit | |
| No initial combustion (does not start) | ECM power source circuit | Refer to ECM Power Source Circuit |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Injector | Refer to INSPECTION | |
| VC output circuit | Refer to VC Output Circuit | |
| ECM | - | |
| Difficult to start (engine cranks normally) | Electronic Throttle Control System (ETCS) | Refer to INSPECTION |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Compression | Refer to ON-VEHICLE INSPECTION - Step 9 | |
| Injector | Refer to INSPECTION | |
| VC output circuit | Refer to VC Output Circuit | |
| Difficult to start with cold engine | Cranking holding function circuit | Refer to Cranking Holding Function Circuit |
| Electronic Throttle Control System (ETCS) | Refer to INSPECTION | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Injector | Refer to INSPECTION | |
| Engine coolant temperature sensor | Refer to INSPECTION - Step 1 | |
| Difficult to start with hot engine | Cooling fan system | Refer to ON-VEHICLE INSPECTION |
| Cranking holding function circuit | Refer to Cranking Holding Function Circuit | |
| Electronic Throttle Control System (ETCS) | Refer to INSPECTION | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Injector | Refer to INSPECTION - Step 1 | |
| Engine coolant temperature sensor | Refer to INSPECTION - Step 1 | |
| High engine idle speed (poor idling) | Electronic Throttle Control System (ETCS) | Refer to INSPECTION |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| A/C signal circuit (Compressor circuit) | - | |
| Acoustic Control Induction System (ACIS) | Refer to ACIS Control Circuit | |
| PCV hose | - | |
| ECM | - | |
| Low engine idle speed (poor idling) | Electronic Throttle Control System (ETCS) | Refer to INSPECTION |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| A/C signal circuit (Compressor circuit) | - | |
| Acoustic Control Induction System (ACIS) | Refer to ACIS Control Circuit | |
| PCV hose | - | |
| Injector | Refer to INSPECTION | |
| ECM | - | |
| Rough idling (poor idling) | Electronic Throttle Control System (ETCS) | Refer to INSPECTION |
| Injector | Refer to INSPECTION | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Compression | Refer to ON-VEHICLE INSPECTION - Step 9 | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Acoustic Control Induction System (ACIS) | Refer to ACIS Control Circuit | |
| PCV hose | - | |
| Hunting (poor idling) | Electronic Throttle Control System (ETCS) | Refer to INSPECTION |
| ECM power source circuit | Refer to ECM Power Source Circuit | |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Injector | Refer to INSPECTION | |
| Acoustic Control Induction System (ACIS) | Refer to ACIS Control Circuit | |
| PCV hose | - | |
| Hesitation/Poor acceleration (poor driveability) | Injector | Refer to INSPECTION - Step 1 |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Air Intake Control System (AICS) | Refer to ACIS Control Circuit | |
| A/T faulty (U151E) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| A/T faulty (U151F) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING | |
| Surging (poor driveability) | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Injector | Refer to INSPECTION | |
| Engine stalls soon after starting | Fuel pump control circuit | Refer to Fuel Pump Control Circuit |
| Electronic Throttle Control System (ETCS) | Refer to INSPECTION | |
| Crankshaft position sensor | Refer to INSPECTION | |
| Spark plug | Refer to ON-VEHICLE INSPECTION - Step 2 | |
| Ignition system | Refer to ON-VEHICLE INSPECTION | |
| Injector | Refer to INSPECTION | |
| Engine stalls during A/C operation | A/C signal circuit (Compressor circuit) | - |
| ECM | - | |
| Unable/difficult to refuel | Refueling valve (canister) | - |
| Engine vibrates frequently when idling (Active Control) | Active control engine mount circuit | Refer to Active Control Engine Mount System |