Problem symptoms table 4GR-FSE Engine

Use the table below 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.

Symptom Suspected area
Engine does not crank (Does not start) 1. Push-start function initialization
2. Immobiliser system
3. ECM power source circuit
4. VC output circuit
5. Starter
6. Starter relay
7. Park/neutral position switch
No initial combustion (Does not start) 1. ECM power source circuit
2. Fuel pump control circuit
3. ECM
Engine cranks normally but difficult to start 1. Fuel pump control circuit
2. Compression
Difficult to start with cold engine 1. Cranking holding function circuit
2. Ignition system
3. Spark plug
4. Fuel pump control circuit
5. Injector
Difficult to start with warm engine 1. Cranking holding function circuit
2. Injector
3. Ignition system
4. Spark plug
5. Fuel pump control circuit
High engine idle speed (Poor idling) 1. ECM power source circuit
2. A/C signal circuit (compressor circuit)
3. Electronic throttle control system
4. Air induction system
5. PCV hose
Low engine idle speed (Poor idling) 1. A/C signal circuit (compressor circuit)
2. Fuel pump control circuit
3. Electronic throttle control system
4. Air induction system
5. PCV hose
Rough idling (Poor idling) 1. Compression
2. Fuel pump control circuit
3. Electronic throttle control system
4. Air induction system
5. PCV hose
Hunting (Poor idling) 1. ECM power source circuit
2. Fuel pump control circuit
3. Spark plug
4. Ignition system
5. Injector
6. Electronic throttle control system
7. Air induction system
8. PCV hose
Hesitation/ Poor acceleration (Poor driveability) 1. Fuel pump control circuit
2. Spark plug
3. Ignition system
4. Injector
Surging (Poor driveability) 1. Spark plug
2. Fuel pump control circuit
3. Ignition system
4. Injector
Engine stalls soon after starting 1. Fuel pump control circuit
2. Spark plug
3. Ignition system
4. Injector
5. Vacuum sensor circuit
Engine stalls during A/C operation 1. A/C signal circuit (Compressor circuit)
2. ECM