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Home >> Lexus >> 2011 >> LX 570 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) >> SFI System >> Problem Symptoms Table (08/2010 - 08/2011) >> Problem Symptoms Table
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Problem Symptoms Table

HINT: 

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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) Battery Refer to ON-VEHICLE INSPECTION - Step 1
Starter Refer to INSPECTION
Starter relay Refer to ON-VEHICLE INSPECTION - Step 1
Park/neutral position switch Refer to ON-VEHICLE INSPECTION
Smart access system with push-button start Refer to Engine does not Start
VC output circuit Refer to VC Output Circuit
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; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent
Camshaft position sensor Refer to DTC P1340: Camshaft Position Sensor "A" (Bank 1 Sensor 2); DTC P1342: Camshaft Position Sensor "A" Low Input (MRE); DTC P1343: Camshaft Position Sensor "A" High Input (MRE)
Ignition system Refer to ON-VEHICLE INSPECTION - Step 1
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Engine immobiliser system Refer to HOW TO PROCEED WITH TROUBLESHOOTING
ECM Refer to TERMINALS OF ECM 
Engine cranks normally but difficult to start Fuel pump control circuit Refer to Fuel Pump Control Circuit
Compression Refer to ON-VEHICLE INSPECTION - Step 3
ECM Power Source Circuit Refer to ECM Power Source Circuit
Difficult to start with cold engine Ignition system Refer to ON-VEHICLE INSPECTION - Step 1
Spark plug Refer to ON-VEHICLE INSPECTION - Step 2
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Injector Refer to INSPECTION
Cranking holding function circuit Refer to Cranking Holding Function Circuit
Difficult to start with warm engine Injector Refer to INSPECTION
Ignition system Refer to ON-VEHICLE INSPECTION - Step 1
Spark plug Refer to ON-VEHICLE INSPECTION - Step 2
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Cranking holding function circuit Refer to Cranking Holding Function Circuit
High engine idle speed Electronic throttle control system Refer to INSPECTION
A/C signal circuit Refer to HOW TO PROCEED WITH TROUBLESHOOTING
ECM power source circuit Refer to ECM Power Source Circuit
Acoustic Control Induction System (ACIS) Refer to ACIS Control Circuit
Low engine idle speed (Poor idling) Electronic throttle control system Refer to INSPECTION
A/C signal circuit Refer to HOW TO PROCEED WITH TROUBLESHOOTING
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Air induction system Refer to ON-VEHICLE INSPECTION - Step 4
Acoustic Control Induction System (ACIS) Refer to ACIS Control Circuit
PCV hose Refer to ON-VEHICLE INSPECTION - Step 3
Rough idling Compression Refer to ON-VEHICLE INSPECTION - Step 3
Spark plug Refer to ON-VEHICLE INSPECTION - Step 2
Injector Refer to INSPECTION
Ignition system Refer to ON-VEHICLE INSPECTION - Step 1
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Electronic throttle control system Refer to INSPECTION
Air induction system Refer to ON-VEHICLE INSPECTION - Step 4
Acoustic Control Induction System (ACIS) Refer to ACIS Control Circuit
PCV hose Refer to ON-VEHICLE INSPECTION - Step 3
Mass air flow meter Refer to INSPECTION
Idle hunting Electronic throttle control system Refer to INSPECTION
Air induction system Refer to ON-VEHICLE INSPECTION - Step 4
ECM power source circuit Refer to ECM Power Source Circuit
Acoustic Control Induction System (ACIS) Refer to ACIS Control Circuit
Hesitation/Poor acceleration A/T faulty Refer to HOW TO PROCEED WITH TROUBLESHOOTING
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Spark plug Refer to ON-VEHICLE INSPECTION - Step 2
Ignition system Refer to ON-VEHICLE INSPECTION - Step 1
Injector Refer to INSPECTION
Mass air flow meter Refer to INSPECTION
Electronic throttle control system Refer to INSPECTION
Air induction system Refer to ON-VEHICLE INSPECTION - Step 4
Compression Refer to ON-VEHICLE INSPECTION - Step 3
Brake override system Refer to Brake Override System
Surging (Poor driveability) Spark plug Refer to ON-VEHICLE INSPECTION - Step 2
Fuel pump control circuit Refer to Fuel Pump Control Circuit
Ignition system Refer to ON-VEHICLE INSPECTION - Step 1
Injector Refer to INSPECTION
Mass air flow meter Refer to INSPECTION
Variable valve timing system Refer to INSPECTION
Compression Refer to ON-VEHICLE INSPECTION - Step 3
Engine stalls soon after starting Fuel pump control circuit Refer to Fuel Pump Control Circuit
Spark plug Refer to ON-VEHICLE INSPECTION - Step 2
Ignition system Refer to ON-VEHICLE INSPECTION - Step 1
Injector Refer to INSPECTION
Variable valve timing system Refer to INSPECTION
Electronic throttle control system Refer to INSPECTION
Air induction system Refer to ON-VEHICLE INSPECTION - Step 4
PCV hose Refer to ON-VEHICLE INSPECTION - Step 3
Compression Refer to ON-VEHICLE INSPECTION - Step 3
Engine stalls only during A/C operation A/C signal circuit Refer to HOW TO PROCEED WITH TROUBLESHOOTING
ECM Refer to TERMINALS OF ECM 
Unable/difficult to refuel Refueling valve (canister) Refer to INSPECTION