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Home >> Lexus >> 2014 >> IS 250C Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) >> SFI System >> Problem Symptoms Table [08/2013 - ] >> Problem Symptoms Table [08/2013 - ]

Problem Symptoms Table [08/2013 - ]

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SFI SYSTEM

Symptom Suspected Area Refer To
Engine does not crank (Does not start) Immobilizer system Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
Battery Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Cranking holding function circuit Refer to Cranking Holding Function Circuit [08/2013 - ]
Smart access system with push button start Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
Starter assembly Refer to INSPECTION [08/2013 - ]
VC output circuit (ECM 5 V output) Refer to VC Output Circuit [08/2013 - ]
No initial combustion (Does not start) ECM power source circuit Refer to ECM Power Source Circuit [08/2013 - ]
VC output circuit (ECM 5 V output) Refer to VC Output Circuit [08/2013 - ]
Crankshaft position sensor Refer to INSPECTION [08/2013 - ]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [08/2013 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Valve timing Refer to PROCEDURE - Step 4
Engine cranks normally but difficult to start Fuel pump control circuit Refer to Fuel Pump Control Circuit [08/2013 - ]
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Engine coolant temperature sensor Refer to INSPECTION [08/2013 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Fuel injector assembly Refer to INSPECTION [08/2013 - ]
Compression Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 10
Intake system Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 1
Throttle body assembly Refer to INSPECTION [08/2013 - ]
Cold start injector circuit Refer to Cold Start Injector Circuit [08/2013 - ]
ECM power source circuit Refer to ECM Power Source Circuit [08/2013 - ]
Incomplete intermittent combustion occurs (Does not start) Fuel pump control circuit Refer to Fuel Pump Control Circuit [08/2013 - ]
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Fuel line Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Fuel injector assembly Refer to INSPECTION [08/2013 - ]
Crankshaft position sensor Refer to INSPECTION [08/2013 - ]
Valve timing Refer to PROCEDURE - Step 4
High engine speed (Poor idle) Air conditioning signal circuit Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
Throttle body assembly Refer to INSPECTION [08/2013 - ]
Throttle body assembly control Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Engine coolant temperature sensor Refer to INSPECTION [08/2013 - ]
PCV hose Refer to ON-VEHICLE INSPECTION [08/2013 - ]
PCV system Refer to INSPECTION [08/2013 - ]
ACIS control circuit Refer to ACIS Control Circuit [08/2013 - ]
Low engine speed (Poor idle) Fuel pump control circuit Refer to Fuel Pump Control Circuit [08/2013 - ]
Throttle body assembly Refer to INSPECTION [08/2013 - ]
Throttle body assembly control Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Intake system Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 1
ACIS control circuit Refer to ACIS Control Circuit [08/2013 - ]
PCV hose Refer to ON-VEHICLE INSPECTION [08/2013 - ]
PCV system Refer to INSPECTION [08/2013 - ]
Engine stalls on deceleration Idle speed (refer to "Low engine speed") Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 9
Rough idle Compression (engine mechanical) Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 10
Air fuel ratio sensor Refer to INSPECTION [08/2013 - ]
Heated oxygen sensor Refer to INSPECTION [08/2013 - ]
Mass air flow meter Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Air conditioning signal circuit Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
Fuel line Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Valve timing Refer to PROCEDURE - Step 4
Fuel pump for low or high pressure Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 1
Intake system Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 1
ACIS control circuit Refer to ACIS Control Circuit [08/2013 - ]
PCV hose Refer to ON-VEHICLE INSPECTION [08/2013 - ]
PCV system Refer to INSPECTION [08/2013 - ]
Hunting (Poor idle) PCV hose Refer to ON-VEHICLE INSPECTION [08/2013 - ]
PCV system Refer to INSPECTION [08/2013 - ]
Mass air flow meter Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Air fuel ratio sensor Refer to INSPECTION [08/2013 - ]
ACIS control circuit Refer to ACIS Control Circuit [08/2013 - ]
Engine stalls during air conditioning operation Air conditioning signal circuit (compressor circuit) Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
ECM Refer to REMOVAL [08/2013 - ]
Cold start injector circuit Refer to Cold Start Injector Circuit [08/2013 - ]
Hesitation/Poor acceleration (Poor driveability) Fuel line Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Fuel pump for low or high pressure Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 1
Valve timing Refer to PROCEDURE - Step 4
Mass air flow meter Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Throttle body assembly Refer to INSPECTION [08/2013 - ]
Knock control sensor Refer to INSPECTION [08/2013 - ]
Brake override system Refer to Brake Override System [08/2013 - ]
Surging (Poor driveability) Fuel line Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [08/2013 - ]
Fuel pump for high pressure Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Fuel injector assembly Refer to INSPECTION [08/2013 - ]
Engine stalls soon after starting Mass air flow meter Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Intake system Refer to ON-VEHICLE INSPECTION [08/2013 - ] - Step 1
Fuel line Refer to ON-VEHICLE INSPECTION [08/2013 - ]
Cold start injector circuit Refer to Cold Start Injector Circuit [08/2013 - ]
Unable/difficult to refuel Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) -