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Home >> Lexus >> 2014 >> IS 250 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (4GR-FSE) - Diagnostics - Introduction (1 Of 2) >> SFI System >> Problem Symptoms Table [04/2013 - 08/2015] >> Problem Symptoms Table [04/2013 - 08/2015]

Problem Symptoms Table [04/2013 - 08/2015]

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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 [04/2013 - 08/2015]
Starter assembly Refer to INSPECTION [04/2013 - 08/2015]
VC output circuit (ECM 5 V output) Refer to VC Output Circuit [04/2013 - 08/2015]
Starter signal circuit Refer to Starter Signal Circuit [04/2013 - 08/2015]
Smart access system with push-button start (for start function) Refer to PROBLEM SYMPTOMS TABLE [04/2013 - 06/2014] , or refer to PROBLEM SYMPTOMS TABLE [06/2014 - ]
Park/neutral position switch assembly (for 2WD models) Refer to INSPECTION [04/2013 - 08/2015]
Park/neutral position switch assembly (for AWD models) Refer to INSPECTION [04/2013 - ]
No initial combustion (Does not start) Engine immobiliser system Refer to PROBLEM SYMPTOMS TABLE [04/2013 - 06/2014]
Refer to PROBLEM SYMPTOMS TABLE [06/2014 - 09/2022]
ECM power source circuit Refer to ECM Power Source Circuit [04/2013 - 08/2015]
VC output circuit (ECM 5 V output) Refer to VC Output Circuit [04/2013 - 08/2015]
Crankshaft position sensor Refer to INSPECTION [04/2013 - 08/2015]
VVT sensor (for intake camshaft) Refer to DTC P0340: Camshaft Position Sensor Circuit Malfunction; DTC P0342: Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor); DTC P0343: Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor); DTC P0345: Camshaft Position Sensor "A" Circuit (Bank 2); DTC P0347: Camshaft Position Sensor "A" Circuit Low Input (Bank 2); DTC P0348: Camshaft Position Sensor "A" Circuit High Input (Bank 2) [04/2013 - 06/2014] , or refer to DTC P0340: Camshaft Position Sensor Circuit; DTC P0342: Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor); DTC P0343: Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor); DTC P0345: Camshaft Position Sensor "A" Circuit (Bank 2); DTC P0347: Camshaft Position Sensor "A" Circuit Low Input (Bank 2); DTC P0348: Camshaft Position Sensor "A" Circuit High Input (Bank 2) [06/2014 - 08/2015]
VVT sensor (for exhaust camshaft) Refer to DTC P0365: Camshaft Position Sensor "B" Circuit (Bank 1); DTC P0367: Camshaft Position Sensor "B" Circuit Low Input (Bank 1); DTC P0368: Camshaft Position Sensor "B" Circuit High Input (Bank 1); DTC P0390: Camshaft Position Sensor "B" Circuit (Bank 2); DTC P0392: Camshaft Position Sensor "B" Circuit Low Input (Bank 2); DTC P0393: Camshaft Position Sensor "B" Circuit High Input (Bank 2) [04/2013 - 08/2015]
Fuel pump control circuit Refer to Fuel Pump Control Circuit [04/2013 - 08/2015]
Ignition system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Valve timing Refer to PROCEDURE - Step 4
Starter signal circuit Refer to Starter Signal Circuit [04/2013 - 08/2015]
ECM Refer to REMOVAL [04/2013 - 08/2015]
Engine cranks normally but difficult to start Fuel pump control circuit Refer to Fuel Pump Control Circuit [04/2013 - 08/2015]
Fuel pump (for high pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Engine coolant temperature sensor Refer to INSPECTION [04/2013 - 08/2015]
Ignition system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Fuel injector assembly Refer to INSPECTION [04/2013 - 08/2015]
Compression Refer to PROCEDURE - Step 10
Intake system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Throttle body with motor assembly Refer to INSPECTION [04/2013 - 08/2015]
PCV hose Refer to COMPONENTS [04/2013 - 08/2015]
Starter signal circuit Refer to Starter Signal Circuit [04/2013 - 08/2015]
Cold start injector circuit Refer to Cold Start Injector Circuit [04/2013 - 08/2015]
ECM power source circuit Refer to ECM Power Source Circuit [04/2013 - 08/2015]
Incomplete intermittent combustion occurs (Does not start) Fuel pump control circuit Refer to Fuel Pump Control Circuit [04/2013 - 08/2015]
Ignition system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Fuel line -
Fuel pump (for low pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Fuel pump (for high pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Fuel injector assembly Refer to INSPECTION [04/2013 - 08/2015]
Crankshaft position sensor Refer to INSPECTION [04/2013 - 08/2015]
VVT sensor (for intake camshaft) Refer to DTC P0340: Camshaft Position Sensor Circuit Malfunction; DTC P0342: Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor); DTC P0343: Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor); DTC P0345: Camshaft Position Sensor "A" Circuit (Bank 2); DTC P0347: Camshaft Position Sensor "A" Circuit Low Input (Bank 2); DTC P0348: Camshaft Position Sensor "A" Circuit High Input (Bank 2) [04/2013 - 06/2014] , or refer to DTC P0340: Camshaft Position Sensor Circuit; DTC P0342: Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor); DTC P0343: Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor); DTC P0345: Camshaft Position Sensor "A" Circuit (Bank 2); DTC P0347: Camshaft Position Sensor "A" Circuit Low Input (Bank 2); DTC P0348: Camshaft Position Sensor "A" Circuit High Input (Bank 2) [06/2014 - 08/2015]
VVT sensor (for exhaust camshaft) Refer to DTC P0365: Camshaft Position Sensor "B" Circuit (Bank 1); DTC P0367: Camshaft Position Sensor "B" Circuit Low Input (Bank 1); DTC P0368: Camshaft Position Sensor "B" Circuit High Input (Bank 1); DTC P0390: Camshaft Position Sensor "B" Circuit (Bank 2); DTC P0392: Camshaft Position Sensor "B" Circuit Low Input (Bank 2); DTC P0393: Camshaft Position Sensor "B" Circuit High Input (Bank 2) [04/2013 - 08/2015]
Valve timing Refer to PROCEDURE - Step 4
Starter signal circuit Refer to Starter Signal Circuit [04/2013 - 08/2015]
ECM power source circuit Refer to ECM Power Source Circuit [04/2013 - 08/2015]
High engine speed Air conditioning signal circuit Refer to PROBLEM SYMPTOMS TABLE [04/2013 - 08/2015]
Throttle body with motor assembly Refer to INSPECTION [04/2013 - 08/2015]
Intake system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Engine coolant temperature sensor Refer to INSPECTION [04/2013 - 08/2015]
PCV hose Refer to COMPONENTS [04/2013 - 08/2015]
PCV system -
ECM power source circuit Refer to ECM Power Source Circuit [04/2013 - 08/2015]
ACIS control circuit Refer to ACIS Control Circuit [04/2013 - 08/2015]
Low engine speed (Poor idle) Fuel pump control circuit Refer to Fuel Pump Control Circuit [04/2013 - 08/2015]
Fuel pump (for high pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Throttle body with motor assembly Refer to INSPECTION [04/2013 - 08/2015]
Intake system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
ACIS control circuit Refer to ACIS Control Circuit [04/2013 - 08/2015]
PCV hose Refer to COMPONENTS [04/2013 - 08/2015]
Rough idle Compression (engine mechanical) Refer to PROCEDURE - Step 10
Air fuel ratio sensor Refer to INSPECTION [04/2013 - 08/2015]
Heated oxygen sensor Refer to INSPECTION [04/2013 - 08/2015]
Mass air flow meter sub-assembly Refer to INSPECTION [04/2013 - 08/2015]
Ignition system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Air conditioning signal circuit Refer to PROBLEM SYMPTOMS TABLE [04/2013 - 08/2015]
Fuel injector assembly Refer to INSPECTION [04/2013 - 08/2015]
Fuel line -
Fuel pump (for low pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Fuel pump (for high pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Intake system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
ACIS control circuit Refer to ACIS Control Circuit [04/2013 - 08/2015]
Electronic throttle control system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
PCV hose Refer to COMPONENTS [04/2013 - 08/2015]
Hunting (Poor idle) Electronic throttle control system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Intake system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
ECM power source circuit Refer to ECM Power Source Circuit [04/2013 - 08/2015]
PCV hose Refer to COMPONENTS [04/2013 - 08/2015]
Mass air flow meter sub-assembly Refer to INSPECTION [04/2013 - 08/2015]
Air fuel ratio sensor Refer to INSPECTION [04/2013 - 08/2015]
ACIS control circuit Refer to ACIS Control Circuit [04/2013 - 08/2015]
Hesitation/Poor acceleration (Poor driveability) Fuel line -
Fuel pump (for low pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Fuel pump (for high pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Spark plug Refer to PROCEDURE - Step 3
Ignition system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Fuel injector assembly Refer to INSPECTION [04/2013 - 08/2015]
ECM power source circuit Refer to ECM Power Source Circuit [04/2013 - 08/2015]
Mass air flow meter sub-assembly Refer to INSPECTION [04/2013 - 08/2015]
Throttle body with motor assembly Refer to INSPECTION [04/2013 - 08/2015]
Knock control sensor Refer to INSPECTION [04/2013 - 08/2015]
Compression (engine mechanical) Refer to PROCEDURE - Step 10
Brake override system Refer to Brake Override System [04/2013 - 08/2015]
Surging (Poor driveability) Spark plug Refer to PROCEDURE - Step 3
Fuel line -
Fuel pump control circuit Refer to Fuel Pump Control Circuit [04/2013 - 08/2015]
Fuel pump (for high pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Ignition system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Fuel injector assembly Refer to INSPECTION [04/2013 - 08/2015]
ECM power source circuit Refer to ECM Power Source Circuit [04/2013 - 08/2015]
Mass air flow meter sub-assembly Refer to INSPECTION [04/2013 - 08/2015]
Variable Valve Timing (VVT) system Refer to DTC P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A); DTC P0018: Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A) [04/2013 - 08/2015]
Compression (engine mechanical) Refer to PROCEDURE - Step 10
Engine stalls soon after starting Fuel pump control circuit Refer to Fuel Pump Control Circuit [04/2013 - 08/2015]
Fuel pump (for low pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Fuel pump (for high pressure side) Refer to INSPECTION [04/2013 - 08/2015]
Fuel line -
Spark plug Refer to PROCEDURE - Step 3
Ignition system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
Fuel injector assembly Refer to INSPECTION [04/2013 - 08/2015]
ECM power source circuit Refer to ECM Power Source Circuit [04/2013 - 08/2015]
Mass air flow meter sub-assembly Refer to INSPECTION [04/2013 - 08/2015]
Throttle body with motor assembly Refer to INSPECTION [04/2013 - 08/2015]
Intake system Refer to ON-VEHICLE INSPECTION [04/2013 - 08/2015]
PCV valve and hose Refer to COMPONENTS [04/2013 - 08/2015]
Compression (engine mechanical) Refer to PROCEDURE - Step 10
Cold start injector circuit Refer to Cold Start Injector Circuit [04/2013 - 08/2015]
Engine stalls only during A/C operation Air conditioning signal circuit Refer to PROBLEM SYMPTOMS TABLE [04/2013 - 08/2015]
ECM Refer to REMOVAL [04/2013 - 08/2015]
Cold start injector circuit Refer to Cold Start Injector Circuit [04/2013 - 08/2015]
Unable/difficult to refuel Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) -
Drive mode does not change Drive mode select switch circuit Refer to Drive Mode Select Switch Circuit [04/2013 - 08/2015]
SNOW mode does not change Pattern select switch snow mode circuit Refer to Pattern Select Switch Snow Mode Circuit [04/2013 - 08/2015]