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Home >> Lexus >> 2012 >> LS 600hL >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (2UR-FSE) (Diagnostics - Introduction) >> SFI System >> Problem Symptoms Table >> Problem Symptoms Table
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Problem Symptoms Table

HINT: 

Use the table below to help determine the cause of the problem. 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.

SFI SYSTEM

Symptom Suspected Area See
Engine does not crank (Does not start) Smart access system with push-button start Refer to Power Source Mode does not Change to ON (READY)
Immobilizer system Refer to HOW TO PROCEED WITH TROUBLESHOOTING
ECM power source circuit Refer to ECM Power Source Circuit
VC output circuit Refer to VC Output Circuit
Hybrid system -
No initial combustion (Does not start) ECM power source circuit Refer to ECM Power Source Circuit
Crankshaft position sensor Refer to DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0337: Crankshaft Position Sensor "A" Circuit Low Input; DTC P0338: Crankshaft Position Sensor "A" Circuit High Input
Ignition system Refer to ON-VEHICLE INSPECTION
Fuel pump control circuit Refer to Fuel Pump Control Circuit
ECM Refer to REMOVAL
VC output circuit Refer to VC Output Circuit
Engine cranks normally but difficult to start Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
Compression Refer to ON-VEHICLE INSPECTION - Step 4
ECM Power Source Circuit Refer to ECM Power Source Circuit
Difficult to start with cold engine Ignition system Refer to ON-VEHICLE INSPECTION
Spark plug Refer to ON-VEHICLE INSPECTION - Step 4
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
Fuel injector for direct injection Refer to INSPECTION
Fuel injector for port injection Refer to INSPECTION
Difficult to start with warm engine Fuel injector for port injection Refer to INSPECTION
Fuel injector for direct injection Refer to INSPECTION
Ignition system Refer to ON-VEHICLE INSPECTION
Spark plug Refer to ON-VEHICLE INSPECTION - Step 4
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
High engine idle speed (Poor idling) ECM power source circuit Refer to ECM Power Source Circuit
A/C signal circuit (compressor circuit) Refer to HOW TO PROCEED WITH TROUBLESHOOTING
Electronic throttle control system Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
Air induction system Refer to ON-VEHICLE INSPECTION
PCV hose Refer to ON-VEHICLE INSPECTION - Step 3
Low engine idle speed (Poor idling) A/C signal circuit (compressor circuit) Refer to HOW TO PROCEED WITH TROUBLESHOOTING
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
Electronic throttle control system Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
Air induction system Refer to ON-VEHICLE INSPECTION
PCV hose Refer to ON-VEHICLE INSPECTION - Step 3
Rough idling (Poor idling) Compression Refer to ON-VEHICLE INSPECTION - Step 4
Spark plug Refer to ON-VEHICLE INSPECTION - Step 4
Fuel injector for port injection Refer to INSPECTION - Step 1
Fuel injector for direct injection Refer to INSPECTION - Step 1
Ignition system Refer to ON-VEHICLE INSPECTION
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
Electronic throttle control system Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
Air induction system Refer to ON-VEHICLE INSPECTION
PCV hose Refer to ON-VEHICLE INSPECTION - Step 3
Mass air flow meter Refer to ON-VEHICLE INSPECTION
Hunting (Poor idling) ECM power source circuit Refer to ECM Power Source Circuit
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
Spark plug Refer to ON-VEHICLE INSPECTION - Step 4
Ignition system Refer to ON-VEHICLE INSPECTION
Fuel injector for port injection Refer to INSPECTION
Fuel injector for direct injection Refer to INSPECTION
Electronic throttle control system Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
Air induction system Refer to ON-VEHICLE INSPECTION
PCV hose Refer to ON-VEHICLE INSPECTION - Step 3
Hesitation/Poor acceleration (Poor driveability) Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
Spark plug Refer to ON-VEHICLE INSPECTION - Step 4
Ignition system Refer to ON-VEHICLE INSPECTION
Fuel injector for port injection Refer to INSPECTION
Fuel injector for direct injection Refer to INSPECTION
Mass air flow meter Refer to ON-VEHICLE INSPECTION
Electronic throttle control system Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
Air induction system Refer to ON-VEHICLE INSPECTION - Step 3
Compression Refer to ON-VEHICLE INSPECTION - Step 4
Surging (Poor driveability) Spark plug Refer to ON-VEHICLE INSPECTION - Step 4
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
Ignition system Refer to ON-VEHICLE INSPECTION
Fuel injector for port injection Refer to INSPECTION
Fuel injector for direct injection Refer to INSPECTION
Mass air flow meter Refer to ON-VEHICLE INSPECTION
Variable valve timing system Refer to DTC P0011: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); DTC P0021: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2)
Compression Refer to ON-VEHICLE INSPECTION - Step 4
Engine stalls soon after starting Fuel pump control circuit Refer to Fuel Pump Control Circuit
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION
Spark plug Refer to ON-VEHICLE INSPECTION - Step 4
Ignition system Refer to ON-VEHICLE INSPECTION
Fuel injector for port injection Refer to INSPECTION
Fuel injector for direct injection Refer to INSPECTION
Variable valve timing system Refer to DTC P0011: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1); DTC P0021: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2)
Electronic throttle control system Refer to DTC P0120: Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction; DTC P0121: Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem; DTC P0122: Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input; DTC P0123: Throttle / Pedal Position Sensor / Switch "A" Circuit High Input; DTC P0220: Throttle / Pedal Position Sensor / Switch "B" Circuit; DTC P0222: Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input; DTC P0223: Throttle / Pedal Position Sensor / Switch "B" Circuit High Input; DTC P2135: Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
Air induction system Refer to ON-VEHICLE INSPECTION - Step 3
PCV hose Refer to ON-VEHICLE INSPECTION - Step 3
Compression Refer to ON-VEHICLE INSPECTION - Step 4
Engine stalls during A/C operation A/C signal circuit (compressor circuit) Refer to HOW TO PROCEED WITH TROUBLESHOOTING
ECM Refer to REMOVAL
Unable/difficult to refuel Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) -
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