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Home >> Toyota >> 2021 >> C-HR LE >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (W/ Canister Pump) - Diagnostics - Introduction (1 Of 3) >> SFI SYSTEM (w/ Canister Pump Module) >> Problem Symptoms Table [05/2018 - 09/2019] >> Problem Symptoms Table [05/2018 - 09/2019]
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Problem Symptoms Table [05/2018 - 09/2019]

HINT: 

Use the table below to help determine the cause of a problem. The likely causes of the problem are indicated in descending order. Check each suspected area in order. Repair or replace faulty parts or perform adjustments as necessary.

Symptom Suspected Area Link
Engine does not crank (Does not start) Battery Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Flow chart [Starter signal circuit] Refer to Starter Signal Circuit [02/2017 - ]
Smart Key System Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - ]
Starter relay assembly Refer to INSPECTION [02/2017 - ]
Starter assembly Refer to INSPECTION [02/2017 - ]
Park/neutral position switch Refer to INSPECTION [02/2017 - ]
Flow chart [VC output circuit] Refer to VC Output Circuit [02/2017 - ]
No initial combustion (Does not start) Immobilizer system*1 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 12/2021]
Immobilizer system*2 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 12/2021]
Flow chart [ECM power source circuit] Refer to ECM Power Source Circuit [02/2017 - ]
Flow chart [VC output circuit] Refer to VC Output Circuit [02/2017 - ]
Crankshaft position sensor Refer to DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent [02/2017 - 09/2019]
Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Ignition circuit Refer to DTC P0351: Ignition Coil "A" Primary / Secondary Circuit; DTC P0352: Ignition Coil "B" Primary / Secondary Circuit; DTC P0353: Ignition Coil "C" Primary / Secondary Circuit; DTC P0354: Ignition Coil "D" Primary / Secondary Circuit [02/2017 - ]
Flow chart [Fuel injector circuit] Refer to Fuel Injector Circuit [02/2017 - ]
Camshaft position sensor (for intake camshaft) 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) [05/2018 - ]
Camshaft position 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) [05/2018 - ]
Fuel injector assembly Refer to INSPECTION [02/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Valve timing (check for loose or jumped teeth on timing chain) Refer to DISASSEMBLY [10/2017 - ]
No. 1 valve rocker arm sub-assembly*5 Refer to COMPONENTS [10/2017 - ]
Engine cranks normally but difficult to start Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Flow chart [Engine difficult to start] Refer to Engine Difficult to Start [02/2017 - ]
Flow chart [ECM power source circuit] Refer to ECM Power Source Circuit [02/2017 - ]
Fuel pump Refer to INSPECTION [02/2017 - ]
Engine coolant temperature sensor Refer to INSPECTION [02/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Fuel injector assembly Refer to INSPECTION [02/2017 - ]
Compression Refer to PROCEDURE - Step 4
Flow chart [Fuel injector circuit] Refer to Fuel Injector Circuit [02/2017 - ]
PCV system Refer to COMPONENTS [02/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Throttle body assembly Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Flow chart [Starter signal circuit] Refer to Starter Signal Circuit [02/2017 - ]
Valve timing (check for loose or jumped teeth on timing chain) Refer to DISASSEMBLY [10/2017 - ]
Spark plug Refer to PROCEDURE - Step 1
No. 1 valve rocker arm sub-assembly*5 Refer to COMPONENTS [10/2017 - ]
Incomplete intermittent combustion occurs (Does not start) Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Fuel pump Refer to INSPECTION [02/2017 - ]
Fuel lines -
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Fuel injector assembly Refer to INSPECTION [02/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Spark plug Refer to PROCEDURE - Step 1
Ignition circuit Refer to DTC P0351: Ignition Coil "A" Primary / Secondary Circuit; DTC P0352: Ignition Coil "B" Primary / Secondary Circuit; DTC P0353: Ignition Coil "C" Primary / Secondary Circuit; DTC P0354: Ignition Coil "D" Primary / Secondary Circuit [02/2017 - ]
Flow chart [Fuel injector circuit] Refer to Fuel Injector Circuit [02/2017 - ]
Crankshaft position sensor Refer to DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent [02/2017 - 09/2019]
Flow chart [ECM power source circuit] Refer to ECM Power Source Circuit [02/2017 - ]
Camshaft position sensor (for intake camshaft) 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) [05/2018 - ]
Camshaft position 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) [05/2018 - ]
Flow chart [Starter signal circuit] Refer to Starter Signal Circuit [02/2017 - ]
Valve timing (check for loose or jumped teeth on timing chain) Refer to DISASSEMBLY [10/2017 - ]
High engine speed (Poor idle) Air conditioning signal circuit*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - ]
Air conditioning signal circuit*4 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - ]
Throttle body assembly Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Engine coolant temperature sensor Refer to INSPECTION [02/2017 - ]
Flow chart [ECM power source circuit] Refer to ECM Power Source Circuit [02/2017 - ]
Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
PCV valve and hose Refer to COMPONENTS [02/2017 - ]
PCV valve Refer to INSPECTION [02/2017 - ]
Low engine speed (Poor idle) Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Throttle body assembly Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
PCV valve and hose Refer to COMPONENTS [02/2017 - ]
PCV valve Refer to INSPECTION [02/2017 - ]
Engine stalls on deceleration Idle speed (refer to "Low engine speed" symptom) -
Rough idle Flow chart [Rough idling] Refer to Rough Idling [02/2017 - ]
Compression Refer to PROCEDURE - Step 4
Throttle body assembly Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Air fuel ratio sensor Refer to INSPECTION [02/2017 - ]
Heated oxygen sensor Refer to INSPECTION [02/2017 - ]
Mass air flow meter Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Manifold absolute pressure sensor Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Fuel pump Refer to INSPECTION [02/2017 - ]
Fuel injector assembly Refer to INSPECTION [02/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Fuel lines -
Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Fuel pump Refer to INSPECTION [02/2017 - ]
Spark plug Refer to PROCEDURE - Step 1
Valve timing (check for loose or jumped teeth on timing chain) Refer to DISASSEMBLY [10/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
PCV valve and hose Refer to COMPONENTS [02/2017 - ]
PCV valve Refer to INSPECTION [02/2017 - ]
VALVEMATIC system Refer to ON-VEHICLE INSPECTION [02/2017 - ]
No. 1 valve rocker arm sub-assembly*5 Refer to COMPONENTS [10/2017 - ]
External part malfunction (Increase in load: A/C system, CVT system, etc.) -
Hunting (Poor idle) PCV valve and hose Refer to COMPONENTS [02/2017 - ]
PCV valve Refer to INSPECTION [02/2017 - ]
Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Spark plug Refer to PROCEDURE - Step 1
Throttle body assembly Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Flow chart [ECM power source circuit] Refer to ECM Power Source Circuit [02/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Flow chart [Drive start control system] Refer to Drive Start Control System [02/2017 - 09/2019]
Mass air flow meter Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Air fuel ratio sensor Refer to INSPECTION [02/2017 - ]
Engine stalls during air conditioning operation Air conditioning signal circuit*3 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - ]
Air conditioning signal circuit*4 Refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - ]
ECM Refer to TERMINALS OF ECM [05/2018 - ] 
Hesitation/Poor acceleration (Poor driveability) VALVEMATIC system Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Flow chart [Lack of power or hesitation] Refer to Lack of Power or Hesitation [02/2017 - ]
Fuel line -
Fuel pump Refer to INSPECTION [02/2017 - ]
Valve timing (check for loose or jumped teeth on timing chain) Refer to DISASSEMBLY [10/2017 - ]
Mass air flow meter Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Throttle body assembly Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Knock sensor Refer to INSPECTION [02/2017 - ]
Fuel injector assembly Refer to INSPECTION [02/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Compression Refer to PROCEDURE - Step 4
Flow chart [Drive start control system] Refer to Drive Start Control System [02/2017 - 09/2019]
Flow chart [Brake override system] Refer to Brake Override System [02/2017 - ]
No. 1 valve rocker arm sub-assembly*5 Refer to COMPONENTS [10/2017 - ]
Lack of power Lack of power Refer to Lack of Power [02/2017 - ]
Surging (Poor driveability) Fuel line -
Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Flow chart [Fuel injector circuit] Refer to Fuel Injector Circuit [02/2017 - ]
Fuel pump Refer to INSPECTION [02/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Ignition circuit Refer to DTC P0351: Ignition Coil "A" Primary / Secondary Circuit; DTC P0352: Ignition Coil "B" Primary / Secondary Circuit; DTC P0353: Ignition Coil "C" Primary / Secondary Circuit; DTC P0354: Ignition Coil "D" Primary / Secondary Circuit [02/2017 - ]
Mass air flow meter Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Compression Refer to PROCEDURE - Step 4
Fuel injector assembly Refer to INSPECTION [02/2017 - ]
No. 1 valve rocker arm sub-assembly*5 Refer to COMPONENTS [10/2017 - ]
Engine stalls soon after starting Mass air flow meter Refer to ON-VEHICLE INSPECTION [10/2017 - ]
Intake system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Flow chart [Fuel pump control circuit] Refer to Fuel Pump Control Circuit [02/2017 - ]
Fuel pump Refer to INSPECTION [02/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Crankshaft position sensor Refer to DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent [02/2017 - 09/2019]
Throttle body assembly Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Manifold absolute pressure sensor Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Fuel line -
Valve timing (check for loose or jumped teeth on timing chain) Refer to DISASSEMBLY [10/2017 - ]
VALVEMATIC system Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Flow chart [Engine stalls] Refer to Engine Stalls [02/2017 - ]
No. 1 valve rocker arm sub-assembly*5 Refer to COMPONENTS [10/2017 - ]
Shift solenoid valve SL Refer to DTC P0741: Torque Converter Clutch Circuit Performance or Stuck OFF; DTC P075B: Shift Solenoid "G" Performance or Stuck Off; DTC P2757: Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance or Stuck OFF [02/2017 - ]
Engine stalls soon after slow down Flow chart [Engine stalls] Refer to Engine Stalls [02/2017 - ]
Fuel injector assembly Refer to INSPECTION [02/2017 - ]
Throttle body assembly Refer to ON-VEHICLE INSPECTION [02/2017 - ]
Ignition system Refer to ON-VEHICLE INSPECTION [10/2017 - 12/2021]
Crankshaft position sensor Refer to DTC P0335: Crankshaft Position Sensor "A" Circuit; DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent [02/2017 - 09/2019]
ECM Refer to TERMINALS OF ECM [05/2018 - ] 
MIL (malfunction indicator lamp) malfunction MIL Circuit Refer to MIL Circuit [02/2017 - ]
Meter/Gauge system Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - ]
  1. *1: w/ Smart Key System
  2. *2: w/o Smart Key System
  3. *3: for Automatic Air Conditioning System with Top-mounted Air Conditioner Pressure Sensor
  4. *4: for Automatic Air Conditioning System with Side-mounted Air Conditioner Pressure Sensor

HINT: 

*5: Check "Fuel Cut Elps Time" in the Data List. If the elapsed time is over 0 sec, then the engine speed is high (More than the engine speed at which fuel cut occurs + 500 rpm). When this has happened, there is a possibility that the No. 1 valve rocker arm sub-assembly will become loose and malfunction, so check that the No. 1 valve rocker arm sub-assembly is properly attached.

Refer to REMOVAL [02/2017 - 08/2020]

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