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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Control System (M20A-FKS) - Diagnostics - Introduction (01 Of 10)) >> SFI System >> Problem Symptoms Table [09/2022 - 11/2022] >> Problem Symptoms Table [09/2022 - 11/2022]

Problem Symptoms Table [09/2022 - 11/2022]

WARNING: This page is about a different variant/trim than selected.

HINT: 

SFI SYSTEM

Symptom Suspected Area Link
Engine does not crank (Does not start) Flow chart [Engine difficult to start] Refer to Engine Difficult to Start [09/2022 - 11/2022]
Flow chart [Engine difficult to start]
(Vehicle Control History Code: X0810, X0811 and/or X0812)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Battery Refer to PROCEDURE - Step 1
ST relay Refer to INSPECTION [06/2018 - 03/2023]
Starter assembly Refer to INSPECTION [06/2018 - ]
Starter signal circuit Refer to Starter Signal Circuit [09/2022 - 11/2022]
Smart key system (for start function) (w/ Smart Key System) (for TMMMS Made) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022]
Smart key system (for start function) (w/ Smart Key System) (for TMC Made) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022]
VC output circuit (ECM 5 V output) Refer to VC Output Circuit [09/2022 - 11/2022]
Park/Neutral position switch assembly (for continuously variable transaxle models) Refer to ON-VEHICLE INSPECTION [06/2018 - 09/2024]
Clutch start switch assembly (for manual transaxle models) Refer to INSPECTION [01/2019 - 11/2022]
No initial combustion (Does not start) Immobiliser system (w/ Smart Key System for TMMMS Made) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022]
Immobiliser system (w/ Smart Key System for TMC Made) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022]
Immobiliser system (w/o Smart Key System) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022]
ECM power source circuit Refer to ECM Power Source Circuit [09/2022 - 11/2022]
VC output circuit (ECM 5 V output) Refer to VC Output Circuit [09/2022 - 11/2022]
Flow chart [Engine difficult to start] Refer to Engine Difficult to Start [09/2022 - 11/2022]
Flow chart [Engine difficult to start]
(Vehicle Control History Code: X0810, X0811 and/or X0812)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Ignition circuit Refer to Ignition Circuit [09/2022 - 11/2022]
Ignition system Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Port fuel injector assembly Refer to INSPECTION [06/2018 - ]
Direct fuel injector assembly Refer to INSPECTION [06/2018 - ]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground [03/2019 - 03/2023]
Intake system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Valve timing Refer to PROCEDURE - Step 7
EGR valve assembly Refer to INSPECTION [06/2018 - ]
No. 1 valve rocker arm sub-assembly*3 Refer to COMPONENTS [09/2022 - 03/2023]
Engine cranks normally but difficult to start ECM power source circuit Refer to ECM Power Source Circuit [09/2022 - 11/2022]
Flow chart [Engine difficult to start] Refer to Engine Difficult to Start [09/2022 - 11/2022]
Flow chart [Engine difficult to start]
(Vehicle Control History Code: X0810, X0811 and/or X0812)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Fuel pump (for low pressure side)*1 Refer to INSPECTION [06/2018 - ]
Fuel pump (for low pressure side)*2 Refer to INSPECTION [06/2021 - 11/2022]
Engine coolant temperature sensor Refer to INSPECTION [06/2018 - ]
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Ignition circuit Refer to Ignition Circuit [09/2022 - 11/2022]
Ignition system Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Spark plug Refer to PROCEDURE - Step 3
Compression Refer to PROCEDURE - Step 11
Port fuel injector assembly Refer to INSPECTION [06/2018 - ]
Direct fuel injector assembly Refer to INSPECTION [06/2018 - ]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground [03/2019 - 03/2023]
Intake system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Valve timing Refer to PROCEDURE - Step 7
EGR valve assembly Refer to INSPECTION [06/2018 - ]
No. 1 valve rocker arm sub-assembly*3 Refer to COMPONENTS [09/2022 - 03/2023]
Incomplete intermittent combustion occurs (Does not start) Flow chart [Engine difficult to start] Refer to Engine Difficult to Start [09/2022 - 11/2022]
Flow chart [Engine difficult to start]
(Vehicle Control History Code: X0810, X0811 and/or X0812)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Ignition circuit Refer to Ignition Circuit [09/2022 - 11/2022]
Ignition system Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Port fuel injector assembly Refer to INSPECTION [06/2018 - ]
Direct fuel injector assembly Refer to INSPECTION [06/2018 - ]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground [03/2019 - 03/2023]
Intake system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Valve timing Refer to PROCEDURE - Step 7
High engine speed Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [06/2018 - ]
ECM power source circuit Refer to ECM Power Source Circuit [09/2022 - 11/2022]
PCV system Refer to DTC P0171-00: System Too Lean Bank 1; DTC P0172-00: System Too Rich Bank 1; DTC P1170-00: Fuel Performance/Port Injector; DTC P117B-00: Fuel Performance/Direct Injector [09/2022 - 11/2022]
Low engine speed (Poor idle) Flow chart [Rough idling] Refer to Rough Idling [04/2020 - ]
Flow chart [Rough idling]
(Vehicle Control History Code: X0821, X0822, X0823, X0824, X082A, X082D and/or X082E)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Port fuel injector assembly Refer to INSPECTION [06/2018 - ]
Direct fuel injector assembly Refer to INSPECTION [06/2018 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [06/2018 - ]
PCV system Refer to DTC P0171-00: System Too Lean Bank 1; DTC P0172-00: System Too Rich Bank 1; DTC P1170-00: Fuel Performance/Port Injector; DTC P117B-00: Fuel Performance/Direct Injector [09/2022 - 11/2022]
Intake system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Rough idle Flow chart [Rough idling] Refer to Rough Idling [04/2020 - ]
Flow chart [Rough idling]
(Vehicle Control History Code: X0821, X0822, X0823, X0824, X082A, X082D and/or X082E)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Port fuel injector assembly Refer to INSPECTION [06/2018 - ]
Direct fuel injector assembly Refer to INSPECTION [06/2018 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Ignition circuit Refer to Ignition Circuit [09/2022 - 11/2022]
Ignition system Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Air fuel ratio sensor (sensor 1) Refer to INSPECTION [06/2018 - 03/2023]
Air fuel ratio sensor (sensor 2) Refer to INSPECTION [06/2018 - ]
Mass air flow meter sub-assembly Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Manifold absolute pressure sensor Refer to DTC P0105-11: Manifold Absolute Pressure / Barometric Pressure Sensor Circuit Short to Ground [03/2019 - 03/2023]
Compression Refer to PROCEDURE - Step 11
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Spark plug Refer to PROCEDURE - Step 3
Intake system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Valve timing Refer to PROCEDURE - Step 7
EGR valve assembly Refer to INSPECTION [06/2018 - ]
No. 1 valve rocker arm sub-assembly*3 Refer to COMPONENTS [09/2022 - 03/2023]
Hunting (Poor idle) Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [06/2018 - ]
ECM power source circuit Refer to ECM Power Source Circuit [09/2022 - 11/2022]
Flow chart [Rough idling] Refer to Rough Idling [04/2020 - ]
Flow chart [Rough idling]
(Vehicle Control History Code: X0821, X0822, X0823, X0824, X082A, X082D and/or X082E)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Spark plug Refer to PROCEDURE - Step 3
Intake system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Drive start control (for continuously variable transaxle models) Refer to Drive Start Control [09/2022 - 11/2022]
Hesitation/Poor acceleration (Poor driveability) Flow chart [Rough idling] Refer to Rough Idling [04/2020 - ]
Flow chart [Rough idling]
(Vehicle Control History Code: X0821, X0822, X0823, X0824, X082A, X082D and/or X082E)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Port fuel injector assembly Refer to INSPECTION [06/2018 - ]
Direct fuel injector assembly Refer to INSPECTION [06/2018 - ]
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Ignition circuit Refer to Ignition Circuit [09/2022 - 11/2022]
Ignition system Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Spark plug Refer to PROCEDURE - Step 3
Intake system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Valve timing Refer to PROCEDURE - Step 7
No. 1 valve rocker arm sub-assembly*3 Refer to COMPONENTS [09/2022 - 03/2023]
Brake override system Refer to Brake Override System [09/2022 - ]
Drive start control (for continuously variable transaxle models) Refer to Drive Start Control [09/2022 - 11/2022]
Lack of power Flow chart [Lack of power] Refer to Lack of Power [09/2022 - 11/2022]
Flow chart [Lack of power]
(Vehicle Control History Code: X0844 and/or X0845)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Surging (Poor driveability) Flow chart [Rough idling] Refer to Rough Idling [04/2020 - ]
Flow chart [Rough idling]
(Vehicle Control History Code: X0821, X0822, X0823, X0824, X082A, X082D and/or X082E)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Spark plug Refer to PROCEDURE - Step 3
Port fuel injector assembly Refer to INSPECTION [06/2018 - ]
Direct fuel injector assembly Refer to INSPECTION [06/2018 - ]
No. 1 valve rocker arm sub-assembly*3 Refer to COMPONENTS [09/2022 - 03/2023]
Engine stalls soon after starting Flow chart [Engine stalls] Refer to Engine Stalls [09/2022 - 11/2022]
Flow chart [Engine stalls]
(Vehicle Control History Code: X0800 and/or X0803)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Fuel system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground [03/2019 - 03/2023]
Ignition system Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Fuel pump assembly (for high pressure side) Refer to ON-VEHICLE INSPECTION [06/2018 - ]
Intake system Refer to ON-VEHICLE INSPECTION [09/2022 - ]
Valve timing Refer to PROCEDURE - Step 7
EGR valve assembly Refer to INSPECTION [06/2018 - ]
Engine stalls soon after slow down Flow chart [Engine stalls] Refer to Engine Stalls [09/2022 - 11/2022]
Flow chart [Engine stalls]
(Vehicle Control History Code: X0800 and/or X0803)
Refer to VEHICLE CONTROL HISTORY [09/2022 - 11/2022]
Port fuel injector assembly Refer to INSPECTION [06/2018 - ]
Direct fuel injector assembly Refer to INSPECTION [06/2018 - ]
Throttle body with motor assembly Refer to ON-VEHICLE INSPECTION [06/2018 - ]
ECM Refer to TERMINALS OF ECM [09/2022 - 11/2022]
Crankshaft position sensor Refer to DTC P0335-11: Crankshaft Position Sensor "A" Circuit Short to Ground [03/2019 - 03/2023]
Ignition circuit Refer to Ignition Circuit [09/2022 - 11/2022]
Ignition system Refer to ON-VEHICLE INSPECTION [06/2018 - ]
MIL (Malfunction Indicator Lamp) malfunction MIL Circuit Refer to MIL Circuit [09/2022 - 11/2022]
Meter/Gauge system (for 12.3 Inch Display) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022]
Meter/Gauge system (except 12.3 Inch Display) Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022]
Unable/difficult to refuel Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) -
  1. *1: except Mexico Models
  2. *2: for Mexico Models

HINT: 

*3: 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 [09/2022 - 03/2023]