Problem Symptoms Table [08/2016 - ]
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 Toyota Corolla, 2018 Toyota Corolla, 2017 Toyota Corolla, 2016 Toyota Corolla, and 2015 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
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.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
SFI SYSTEM:
| Symptom | Suspected Area | Link |
|---|---|---|
| Engine does not crank (Does not start) | Smart key system (w/ smart key system) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] |
| Battery | Refer to PROCEDURE - Step 1 | |
| Starter signal circuit | Refer to Starter Signal Circuit [08/2016 - ] | |
| Smart key system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] | |
| VC output circuit (ECM 5 V output) | Refer to VC Output Circuit [08/2016 - ] | |
| No initial combustion (Does not start) | Immobilizer system (w/o smart key system) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] |
| Immobilizer system (w/ smart key system) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] | |
| ECM power source circuit | Refer to ECM Power Source Circuit [08/2013 - ] | |
| VC output circuit (ECM 5 V output) | Refer to VC Output Circuit [08/2016 - ] | |
| 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 - ] | |
| Fuel injector circuit | Refer to Fuel Injector Circuit [08/2016 - ] | |
| Valve timing (check for loose or jumped teeth on timing chain) | Refer to INSPECTION [08/2013 - ] | |
| No. 1 valve rocker arm sub-assembly* | Refer to COMPONENTS [08/2016 - 08/2017] Refer to COMPONENTS [08/2017 - ] | |
| Engine cranks normally but difficult to start | Fuel pump control circuit | Refer to Fuel Pump Control Circuit [08/2013 - ] |
| Fuel pump | Refer to 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 [08/2016 - ] | |
| Fuel injector circuit | Refer to Fuel Injector Circuit [08/2016 - ] | |
| ECM power source circuit | Refer to ECM Power Source Circuit [08/2013 - ] | |
| Intake system | Refer to ON-VEHICLE INSPECTION [08/2016 - ] | |
| Throttle body assembly | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| No. 1 valve rocker arm sub-assembly* | Refer to COMPONENTS [08/2016 - 08/2017] Refer to COMPONENTS [08/2017 - ] | |
| Incomplete intermittent combustion occurs (Does not start) | Fuel pump control circuit | Refer to Fuel Pump Control Circuit [08/2013 - ] |
| Fuel pump | Refer to INSPECTION [08/2013 - ] | |
| Fuel line | - | |
| 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 (check for loose or jumped teeth on timing chain) | Refer to INSPECTION [08/2013 - ] | |
| High engine speed (Poor idle) | Air conditioning signal circuit (for automatic air conditioning system) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] |
| Air conditioning signal circuit (for manual air conditioning system) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] | |
| Throttle body assembly | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Intake system | Refer to ON-VEHICLE INSPECTION [08/2016 - ] | |
| Engine coolant temperature sensor | Refer to INSPECTION [08/2013 - ] | |
| ECM power source circuit | Refer to ECM Power Source Circuit [08/2013 - ] | |
| PCV hose | Refer to COMPONENTS [08/2013 - ] | |
| PCV valve | Refer to INSPECTION [08/2013 - ] | |
| Low engine speed (Poor idle) | Fuel pump control circuit | Refer to Fuel Pump Control Circuit [08/2013 - ] |
| Throttle body assembly | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Intake system | Refer to ON-VEHICLE INSPECTION [08/2016 - ] | |
| PCV hose | Refer to COMPONENTS [08/2013 - ] | |
| PCV valve | Refer to INSPECTION [08/2013 - ] | |
| Engine stalls on deceleration | Idle speed (refer to "Low engine speed" symptom) | - |
| Rough idle | Compression | Refer to PROCEDURE - Step 10 |
| Air fuel ratio sensor | Refer to INSPECTION [08/2013 - ] | |
| Heated oxygen sensor | Refer to INSPECTION [08/2013 - ] | |
| Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Ignition system | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Fuel line | - | |
| Fuel pump | Refer to INSPECTION [08/2013 - ] | |
| Intake system | Refer to ON-VEHICLE INSPECTION [08/2016 - ] | |
| PCV hose | Refer to COMPONENTS [08/2013 - ] | |
| PCV valve | Refer to INSPECTION [08/2013 - ] | |
| No. 1 valve rocker arm sub-assembly* | Refer to COMPONENTS [08/2016 - 08/2017] Refer to COMPONENTS [08/2017 - ] | |
| External part malfunction (Increase in load: A/C system, CVT system, etc.) | - | |
| Hunting (Poor idle) | PCV hose | Refer to COMPONENTS [08/2013 - ] |
| PCV valve | Refer to INSPECTION [08/2013 - ] | |
| Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Air fuel ratio sensor | Refer to INSPECTION [08/2013 - ] | |
| Engine stalls during air conditioning operation | Air conditioning signal circuit (for automatic air conditioning system) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] |
| Air conditioning signal circuit (for manual air conditioning system) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ] | |
| ECM | Refer to TERMINALS OF ECM [08/2016 - ] | |
| Hesitation/Poor acceleration (Poor driveability) | Fuel line | - |
| Fuel pump | Refer to INSPECTION [08/2013 - ] | |
| Valve timing (check for loose or jumped teeth on timing chain) | Refer to INSPECTION [08/2013 - ] | |
| Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Throttle body assembly | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Knock control sensor | Refer to INSPECTION [08/2013 - ] | |
| Fuel injector assembly | Refer to INSPECTION [08/2013 - ] | |
| Ignition system | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Compression | Refer to PROCEDURE - Step 10 | |
| Brake override system | Refer to Brake Override System [08/2016 - ] | |
| No. 1 valve rocker arm sub-assembly* | Refer to COMPONENTS [08/2016 - 08/2017] Refer to COMPONENTS [08/2017 - ] | |
| Surging (Poor driveability) | Fuel line | - |
| Fuel pump control circuit | Refer to Fuel Pump Control Circuit [08/2013 - ] | |
| Fuel pump | Refer to INSPECTION [08/2013 - ] | |
| Ignition system | Refer to ON-VEHICLE INSPECTION [08/2013 - ] | |
| Fuel injector assembly | Refer to INSPECTION [08/2013 - ] | |
| No. 1 valve rocker arm sub-assembly* | Refer to COMPONENTS [08/2016 - 08/2017] Refer to COMPONENTS [08/2017 - ] | |
| Engine stalls soon after starting | Mass air flow meter sub-assembly | Refer to ON-VEHICLE INSPECTION [08/2013 - ] |
| Intake system | Refer to ON-VEHICLE INSPECTION [08/2016 - ] | |
| Fuel line | - | |
| Valve timing (check for loose or jumped teeth on timing chain) | Refer to INSPECTION [08/2013 - ] | |
| No. 1 Valve rocker arm sub-assembly* | Refer to COMPONENTS [08/2016 - 08/2017] Refer to COMPONENTS [08/2017 - ] | |
| Shift solenoid valve SL (K313 CVT) (for CVT models) | Refer to DTC P0741: Torque Converter Clutch Solenoid Performance (Shift Solenoid Valve SL); DTC P075B: Shift Solenoid "G" Performance or Stuck Off; DTC P2757: Torque Converter Clutch Pressure Control Solenoid Performance (Shift Solenoid Valve SLU) [08/2016 - ] | |
| Unable/difficult to refuel | Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) | - |
HINT:
*: Check "Fuel Cut Elps 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 [08/2016 - 08/2017] Refer to COMPONENTS [08/2017 - ]