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Home >> Toyota >> 2006 >> Tacoma PreRunner, 2D Pickup >> Repair and Diagnosis >> Engine Performance >> Engine Control System (2TR-FE) >> SFI System >> Problem Symptoms Table

Problem Symptoms Table

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Use PROBLEM SYMPTOMS TABLE  to help determine the cause of the problem symptom. 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.

PROBLEM SYMPTOMS TABLE

Symptom Suspected area Reference
Engine does not crank (Does not start) 1. Immobilizer system SYSTEM DESCRIPTION
2. Starter STARTER
3. STARTER relay STARTER RELAY
No initial combustion (Does not start) 1. ECM power source circuit ECM POWER SOURCE CIRCUIT 
2. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
3. VC output circuit VC OUTPUT CIRCUIT 
4. ECM ECM 
Engine cranks normally but difficult to start 1. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
2. Compression ENGINE
Difficult to start with cold engine 1. Starter signal circuit DTC P0617 STARTER RELAY CIRCUIT HIGH 
2. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
3. Spark plug ON-VEHICLE INSPECTION
4. Ignition system ON-VEHICLE INSPECTION
5. Injector REMOVAL
Difficult to start with warm engine 1. Starter signal circuit DTC P0617 STARTER RELAY CIRCUIT HIGH 
2. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
3. Spark plug ON-VEHICLE INSPECTION
4. Ignition system ON-VEHICLE INSPECTION
5. Injector REMOVAL
High engine idling speed (Poor idling) 1. A/C signal circuit (compressor circuit) SYSTEM DIAGRAM
2. ECM power source circuit ECM POWER SOURCE CIRCUIT 
3. Electronic throttle control system ON-VEHICLE INSPECTION 
4. Air induction system ON-VEHICLE INSPECTION
5. PCV hose VENTILATION VALVE
Low engine idling speed (Poor idling) 1. A/C signal circuit (compressor circuit) SYSTEM DIAGRAM
2. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
3. Electronic throttle control system ON-VEHICLE INSPECTION 
4. Air induction system ON-VEHICLE INSPECTION
5. PCV hose VENTILATION VALVE
Rough idling (Poor idling) 1. Compression ENGINE
2. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
3. Electronic throttle control system ON-VEHICLE INSPECTION 
4. Air induction system ON-VEHICLE INSPECTION
5. PCV hose VENTILATION VALVE
6. Mass air flow meter MASS AIR FLOW METER 
Hunting (Poor idling) 1. ECM power source circuit ECM POWER SOURCE CIRCUIT 
2. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
3. Spark plug ON-VEHICLE INSPECTION
4. Ignition system ON-VEHICLE INSPECTION
5. Injector REMOVAL
6. Electronic throttle control system ON-VEHICLE INSPECTION 
7. Air induction system ON-VEHICLE INSPECTION
8. PCV hose VENTILATION VALVE
Hesitation/Poor acceleration (Poor driveability) 1. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
2. A/T faulty(1) SYSTEM DESCRIPTION
3. Spark plug ON-VEHICLE INSPECTION
4. Ignition system ON-VEHICLE INSPECTION
5. Injector REMOVAL
6. Mass air flow meter MASS AIR FLOW METER 
Surging (Poor driveability) 1. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
2. Spark plug ON-VEHICLE INSPECTION
3. Ignition system ON-VEHICLE INSPECTION
4. Injector REMOVAL
5. Mass air flow meter MASS AIR FLOW METER 
Engine stalls soon after starting 1. Fuel pump control circuit FUEL PUMP CONTROL CIRCUIT 
2. Spark plug ON-VEHICLE INSPECTION
3. Ignition system ON-VEHICLE INSPECTION
4. Injector REMOVAL
Engine stalls during A/C operation 1. A/C signal circuit (Compressor circuit) SYSTEM DIAGRAM
2. ECM ECM 
Unable/difficult to refuel 1. Refueling valve (canister) INSPECTION
(1) :Automatic Transmission models only