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Home >> Lexus >> 2024 >> IS 350 F Sport Design, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FKS) - Diagnostics - Introduction (1 Of 4) >> SFI System >> Problem Symptoms Table [10/2017 - ] >> Problem Symptoms Table [10/2017 - ]
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Problem Symptoms Table [10/2017 - ]

HINT: 

SFI SYSTEM

Symptom Suspected Area Link
Engine does not crank (Does not start) Battery Refer to PROCEDURE - Step 1
ST relay Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Starter assembly Refer to INSPECTION [10/2017 - ]
Starter signal circuit Refer to Starter Signal Circuit [10/2017 - 09/2019] , or refer to Starter Signal Circuit [09/2019 - 09/2020] , or refer to Starter Signal Circuit [09/2020 - ]
Smart access system with push-button start (for start function) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 11/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 09/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ]
VC output circuit (ECM 5 V output) Refer to VC Output Circuit [10/2017 - ]
Park/neutral position switch assembly (for 2WD models) Refer to INSPECTION [04/2013 - ]
Park/neutral position switch assembly (for AWD models) Refer to INSPECTION [04/2013 - ]
No initial combustion (Does not start) Immobiliser system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 11/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 09/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ]
ECM power source circuit Refer to ECM Power Source Circuit [10/2017 - ]
VC output circuit (ECM 5 V output) Refer to VC Output Circuit [10/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Fuel injector assembly (for port injection) Refer to INSPECTION [10/2017 - ]
Fuel injector assembly (for direct injection) Refer to INSPECTION [10/2017 - ]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open [10/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Valve timing Refer to PROCEDURE - Step 7 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 7 [09/2018 - ]
No. 1 valve rocker arm sub-assembly* Refer to COMPONENTS [10/2017 - ]
Engine cranks normally but difficult to start ECM power source circuit Refer to ECM Power Source Circuit [10/2017 - ]
Flow chart [Engine difficult to start] Refer to Engine Difficult to Start [10/2017 - 09/2018] , or refer to Engine Difficult to Start [09/2018 - 09/2020] , or refer to Engine Difficult to Start [09/2020 - ]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Fuel pump (for low pressure side) Refer to INSPECTION [10/2017 - ]
Engine coolant temperature sensor Refer to INSPECTION [10/2017 - ]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Spark plug Refer to PROCEDURE - Step 3
Compression Refer to PROCEDURE - Step 10 [10/2017 - 09/2020] , or refer to PROCEDURE - Step 10 [09/2020 - ]
Fuel injector assembly (for port injection) Refer to INSPECTION [10/2017 - ]
Fuel injector assembly (for direct injection) Refer to INSPECTION [10/2017 - ]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open [10/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Valve timing Refer to PROCEDURE - Step 7 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 7 [09/2018 - ]
No. 1 valve rocker arm sub-assembly* Refer to COMPONENTS [10/2017 - ]
Incomplete intermittent combustion occurs (Does not start) Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Fuel injector assembly (for port injection) Refer to INSPECTION [10/2017 - ]
Fuel injector assembly (for direct injection) Refer to INSPECTION [10/2017 - ]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open [10/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Valve timing Refer to PROCEDURE - Step 7 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 7 [09/2018 - ]
High engine speed Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [10/2017 - ]
ECM power source circuit Refer to ECM Power Source Circuit [10/2017 - ]
PCV hose Refer to COMPONENTS [10/2017 - ]
PCV system Refer to INSPECTION [10/2017 - ]
Low engine speed (Poor idle) Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Fuel injector assembly (for port injection) Refer to INSPECTION [10/2017 - ]
Fuel injector assembly (for direct injection) Refer to INSPECTION [10/2017 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [10/2017 - ]
PCV hose Refer to COMPONENTS [10/2017 - ]
PCV system Refer to INSPECTION [10/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Rough idle Flow chart [Rough idling] Refer to Rough Idling [10/2017 - 09/2018] , or refer to Rough Idling [09/2018 - 09/2020] , or refer to Rough Idling [09/2020 - ]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Fuel injector assembly (for port injection) Refer to INSPECTION [10/2017 - ]
Fuel injector assembly (for direct injection) Refer to INSPECTION [10/2017 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Compression Refer to PROCEDURE - Step 10 [10/2017 - 09/2020] , or refer to PROCEDURE - Step 10 [09/2020 - ]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Spark plug Refer to PROCEDURE - Step 3
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Valve timing Refer to PROCEDURE - Step 7 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 7 [09/2018 - ]
No. 1 valve rocker arm sub-assembly* Refer to COMPONENTS [10/2017 - ]
Hunting (Poor idle) Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [10/2017 - ]
ECM power source circuit Refer to ECM Power Source Circuit [10/2017 - ]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Spark plug Refer to PROCEDURE - Step 3
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Drive start control Refer to Drive Start Control [10/2017 - 09/2018] , or refer to Drive Start Control [09/2018 - 09/2019] , or refer to Drive Start Control [09/2019 - 09/2020] , or refer to Drive Start Control [09/2020 - ]
Hesitation/Poor acceleration (Poor driveability) Fuel injector assembly (for port injection) Refer to INSPECTION [10/2017 - ]
Fuel injector assembly (for direct injection) Refer to INSPECTION [10/2017 - ]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Fuel pump assembly (for high pressure side) Refer to INSPECTION [10/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Spark plug Refer to PROCEDURE - Step 3
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Valve timing Refer to PROCEDURE - Step 7 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 7 [09/2018 - ]
No. 1 valve rocker arm sub-assembly* Refer to COMPONENTS [10/2017 - ]
Brake override system Refer to Brake Override System [10/2017 - 09/2019] , or refer to Brake Override System [09/2019 - 09/2020] , or refer to Brake Override System [09/2020 - ]
Drive start control Refer to Drive Start Control [10/2017 - 09/2018] , or refer to Drive Start Control [09/2018 - 09/2019] , or refer to Drive Start Control [09/2019 - 09/2020] , or refer to Drive Start Control [09/2020 - ]
Lack of power Flow chart [Lack of power] Refer to Lack of Power [10/2017 - 09/2018] , or refer to Lack of Power [09/2018 - 09/2020] , or refer to Lack of Power [09/2020 - ]
Surging (Poor driveability) Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Spark plug Refer to PROCEDURE - Step 3
Fuel injector assembly (for port injection) Refer to INSPECTION [10/2017 - ]
Fuel injector assembly (for direct injection) Refer to INSPECTION [10/2017 - ]
No. 1 valve rocker arm sub-assembly* Refer to COMPONENTS [10/2017 - ]
Engine stalls soon after starting Flow chart [Engine stalls] Refer to Engine Stalls [10/2017 - 09/2018] , or refer to Engine Stalls [09/2018 - 09/2020] , or refer to Engine Stalls [09/2020 - ]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [10/2017 - ]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open [10/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Valve timing Refer to PROCEDURE - Step 7 [10/2017 - 09/2018] , or refer to PROCEDURE - Step 7 [09/2018 - ]
Engine stalls soon after slow down Flow chart [Engine stalls] Refer to Engine Stalls [10/2017 - 09/2018] , or refer to Engine Stalls [09/2018 - 09/2020] , or refer to Engine Stalls [09/2020 - ]
Fuel injector assembly (for port injection) Refer to INSPECTION [10/2017 - ]
Fuel injector assembly (for direct injection) Refer to INSPECTION [10/2017 - ]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [10/2017 - ]
ECM Refer to TERMINALS OF ECM [10/2017 - 09/2020] , or refer to TERMINALS OF ECM [09/2020 - ] 
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground; DTC P0335-15: Crankshaft Position Sensor "A" Circuit Short to Battery or Open [10/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - ]
MIL (Malfunction Indicator Lamp) malfunction MIL Circuit Refer to MIL Circuit [10/2017 - ]
Meter/Gauge system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - ]
Unable/difficult to refuel Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) -
Drive mode does not change Drive mode switch circuit Refer to Drive Mode Select Switch Circuit [10/2017 - 11/2021] , or refer to Drive Mode Select Switch Circuit [11/2021 - ]

HINT: 

*: Check "Fuel Cut Elapsed Time" in the Data List. If the elapsed time is over 0 sec, then the engine speed is high (the engine speed at which fuel cut occurs + 500 rpm or more). In this situation, there is a possibility that a No. 1 valve rocker arm sub-assembly will become loose and malfunction, check that the No. 1 valve rocker arm sub-assemblies are properly installed.

Refer to COMPONENTS [10/2017 - ]