Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GJ7B
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 04/2020]
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P219519,P219524,P219618,P219623; A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold; 2020 MY Corolla Corolla HV [01/2019 - 04/2020]

DTC

P219519

A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold

DTC

P219524

A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High

DTC

P219618

A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold

DTC

P219623

A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low

DESCRIPTION

HINT:

Although the DTC titles say oxygen sensor, these DTCs relate to the air fuel ratio sensor.

The air fuel ratio sensor generates voltage* that corresponds to the actual air fuel ratio. This sensor voltage is used to provide the ECM with feedback so that it can control the air fuel ratio. The ECM determines the deviation from the stoichiometric air fuel ratio, and regulates the fuel injection time. If the air fuel ratio sensor malfunctions, the ECM is unable to control the air fuel ratio accurately.

The air fuel ratio sensor is a planar type and integrated with a heater, which heats the solid electrolyte (zirconia element). This heater is controlled by the ECM. When the intake air volume is low (the exhaust gas temperature is low), current flows to the heater to heat the sensor, in order to facilitate accurate oxygen concentration detection. In addition, the sensor and heater portions are a narrow type. The heat generated by the heater is conducted to the solid electrolyte through alumina, therefore sensor activation is accelerated.

In order to obtain a high purification rate of the carbon monoxide (CO), hydrocarbon (HC) and nitrogen oxide (NOx) components in the exhaust gas, a three-way catalytic converter is used. For the most efficient use of the three-way catalytic converter, the air fuel ratio must be precisely controlled so that it is always close to the stoichiometric air fuel ratio.

*: Value changes inside the ECM. Since the air fuel ratio sensor is a current output element, the current is converted into a voltage inside the ECM. Any measurements taken at the air fuel ratio sensor or ECM connectors will show a constant voltage.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P219519

A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold

While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor current is 2.2 mA or higher for 3 seconds or more (2 trip detection logic).

  • Air fuel ratio sensor (sensor 1)
  • ECM

Comes on

DTC stored

  • SAE Code: P2195
  • DTC for Mexico Models: Does not apply

P219524

A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High

Both of the following conditions are met for 5 seconds or more (2 trip detection logic):

  1. Air fuel ratio sensor voltage is higher than 3.8 V.
  2. Heated oxygen sensor voltage is 0.21 V or higher.
  • Open or short in air fuel ratio sensor (sensor 1) circuit
  • Air fuel ratio sensor (sensor 1)
  • Intake system
  • Exhaust gas leak
  • Fuel pressure
  • Fuel injector assembly
  • EGR valve assembly
  • ECM

Comes on

DTC stored

  • SAE Code: P2195
  • DTC for Mexico Models: Does not apply

P219618

A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold

While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor current is less than 0.7 mA for 3 seconds or more (2 trip detection logic).

  • Air fuel ratio sensor (sensor 1)
  • ECM

Comes on

DTC stored

  • SAE Code: P2196
  • DTC for Mexico Models: Does not apply

P219623

A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low

Both of the following conditions are met for 5 seconds or more (2 trip detection logic):

  1. Air fuel ratio sensor voltage is less than 2.8 V.
  2. Heated oxygen sensor voltage is less than 0.7 V.
  • Open or short in air fuel ratio sensor (sensor 1) circuit
  • Air fuel ratio sensor (sensor 1)
  • Intake system
  • Exhaust gas leak
  • Fuel pressure
  • Fuel injector assembly
  • EGR valve assembly
  • ECM

Comes on

DTC stored

  • SAE Code: P2196
  • DTC for Mexico Models: Does not apply

HINT:

  • When any of these DTCs are stored, check the air fuel ratio sensor output voltage by entering the following menus on the Techstream: Powertrain / Engine / Data List / A/F (O2) Sensor Voltage B1S1.
  • Short-term fuel trim values can also be read using the Techstream.
  • The ECM regulates the voltages at terminals A1A+ and A1A- of the ECM to a constant level. Therefore, the air fuel ratio sensor output voltage cannot be confirmed without using the Techstream.
  • If an air fuel ratio sensor malfunction is detected, the ECM will store a DTC.

MONITOR DESCRIPTION

Sensor Voltage Detection Monitor:

Under air fuel ratio feedback control, If the air fuel ratio sensor output voltage is less than 2.8 V (very rich condition) for 5 seconds despite the heated oxygen sensor output voltage being less than 0.7 V, the ECM stores DTC P219623. Alternatively, if the air fuel ratio sensor output voltage is higher than 3.8 V (very lean condition) for 5 seconds despite the heated oxygen sensor output voltage being 0.21 V or higher, DTC P219524 is stored.

Sensor Current Detection Monitor:

A rich air fuel mixture causes a low air fuel ratio sensor current, and a lean air fuel mixture causes a high air fuel ratio sensor current. Therefore, the sensor output becomes low during acceleration, and it becomes high during deceleration with the throttle valve fully closed. The ECM monitors the air fuel ratio sensor current during fuel-cut and detects any abnormal current values.

If the air fuel ratio sensor output is 2.2 mA or higher for 3 seconds or more of cumulative time, the ECM interprets this as a malfunction of the air fuel ratio sensor and stores DTC P219519 (stuck on high side). If the air fuel ratio sensor output is less than 0.7 mA for 3 seconds or more of cumulative time, the ECM stores DTC P219618 (stuck on low side).

MONITOR STRATEGY

Related DTCs

P2195: Air fuel ratio sensor signal stuck lean

P2196: Air fuel ratio sensor signal stuck rich

Required Sensors/Components (Main)

Air fuel ratio sensor

Required Sensors/Components (Related)

Heated oxygen sensor

Frequency of Operation

Continuous: Sensor voltage detection monitor

Once per driving cycle: Sensor current detection monitor

Duration

3 seconds: Sensor current detection monitor

5 seconds: Sensor voltage detection monitor

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

P0010 (Camshaft timing oil control valve)

P0011 (VVT system - advance)

P0012 (VVT system - retard)

P0016 (VVT system - misalignment)

P0031, P0032, P101D (Air fuel ratio sensor heater)

P0037, P0038, P0141, P102D (Heated oxygen sensor heater)

P0101, P0102, P0103 (Mass air flow meter)

P0106, P0107, P0108 (Manifold absolute pressure)

P0111, P0112, P0113 (Intake air temperature sensor)

P0116, P0117, P0118 (Engine coolant temperature sensor)

P011B (Engine coolant temperature/intake air temperature sensor correlation)

P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor)

P0125 (Insufficient coolant temperature for closed loop fuel control)

P0128 (Thermostat)

P0136, P0137, P0138, P0139, P013A, P0607 (Heated oxygen sensor)

P0171, P0172 (Fuel system)

P0300 - P0304 (Misfire)

P0327, P0328 (Knock control sensor)

P0335 (Crankshaft position sensor)

P0340, P0342, P0343 (Camshaft position sensor)

P0351 - P0354 (Igniter)

P0400 (EGR system)

P0401 (EGR system (closed))

P0403 (EGR control circuit)

P0441 (EVAP system)

P0657, P0658, P2102, P2103, P2111, P2112, P2119 (Throttle actuator)

P219A, P219C, P219D, P219E, P219F (Air-fuel ratio imbalance)

P2228, P2229 (Atmospheric pressure sensor)

Sensor Voltage Detection Monitor

Time after engine start

30 seconds or more

Auxiliary battery voltage

11 V or higher

Air fuel ratio sensor status

Activated

Fuel system status

Closed-loop

Air fuel ratio imbalance of clogged EGR runner fail (P10AA)

Not set

Sensor Current Detection Monitor

Auxiliary battery voltage

11 V or higher

Engine coolant temperature

75°C (167°F) or higher

Atmospheric pressure

76 kPa(abs) [11 psi(abs)] or higher

Air fuel ratio sensor status

Activated

Continuous time of fuel-cut

3 seconds or more, and less than 10 seconds

Air fuel ratio imbalance of clogged EGR runner fail (P10AA)

Not set

TYPICAL MALFUNCTION THRESHOLDS

P2195: Sensor Voltage Detection Monitor (Lean Side Malfunction)

Heated oxygen sensor voltage

0.21 V or higher

Air fuel ratio sensor voltage

Higher than 3.8 V

P2196: Sensor Voltage Detection Monitor (Rich Side Malfunction)

Heated oxygen sensor voltage

Less than 0.7 V

Air fuel ratio sensor voltage

Less than 2.8 V

P2195: Sensor Current Detection Monitor (High Side Malfunction)

Duration of following condition

3 seconds or more

Air fuel ratio sensor current

2.2 mA or higher

P2196: Sensor Current Detection Monitor (Low Side Malfunction)

Duration of following condition

3 seconds or more

Air fuel ratio sensor current

Less than 0.7 mA

MONITOR RESULT

Refer to detailed information in Checking Monitor Status.

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P2195, P2196: O2 Sensor / RANGE B1S1

Monitor ID

Test ID

Scaling

Unit

Description

$01

$91

Multiply by 0.004

mA

A/F sensor current

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

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  9. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher [A].
  10. With the engine running, drive the vehicle at a speed between 75 and 100 km/h (47 and 62 mph) for at least 10 minutes [B].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    HINT:

    If the engine stops, further depress the accelerator pedal to restart the engine.

  11. With shift state B selected [C] and the engine running, accelerate the vehicle to 75 km/h (47 mph) or more by depressing the accelerator pedal for at least 10 seconds [D].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

    HINT:

    If the engine stops, further depress the accelerator pedal to restart the engine.

  12. Soon after performing step [D] above, release the accelerator pedal for at least 5 seconds without depressing the brake pedal in order to execute fuel-cut control [E].
  13. Allow the vehicle to decelerate until the vehicle speed is less than 10 km/h (6 mph).
  14. Repeat steps [C] through [E] above at least 3 times in one driving cycle.
  15. Enter the following menus: Powertrain / Engine / Trouble Codes [F].
  16. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  17. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  18. Input the DTC: P219519, P219524, P219618 or P219623.
  19. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL

    • DTC judgment completed
    • System normal

    ABNORMAL

    • DTC judgment completed
    • System abnormal

    INCOMPLETE

    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system has a malfunction.
    • If the judgment result is INCOMPLETE, perform steps [B] through [F] again.
    • [A] to [F]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

  • A low air fuel ratio sensor voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
  • A high air fuel ratio sensor voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
  • Sensor 1 refers to the sensor closest to the engine assembly.
  • Sensor 2 refers to the sensor farthest away from the engine assembly.
  • Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P219519, P219524, P219618 OR P219623)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P219519, P219524, P219618 or P219623 is output

A

DTC P219519, P219524, P219618 or P219623 and P013611, P013613, P013614, P013615 or P013617 are output

DTC P219519, P219524, P219618 or P219623 and other DTCs are output

B

HINT:

If any DTCs relating to the air fuel ratio sensor (DTCs for the air fuel ratio sensor heater or air fuel ratio sensor admittance) are output, troubleshoot those DTCs first.

B

GO TO DTC CHART

A

2.

CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST

(a) Has the vehicle run out of fuel in the past?

NO

GO TO STEP 5

YES

3.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the power switch off and wait for at least 30 seconds.

NEXT

4.

CHECK WHETHER DTC OUTPUT RECURS (DTC P219519, P219524, P219618 OR P219623)

(a) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display

All Readiness

(c) Input the DTC: P219519, P219524, P219618 or P219623.

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

A

ABNORMAL

(DTC P219519, P219524, P219618 or P219623 is output)

B

A

DTC CAUSED BY RUNNING OUT OF FUEL

B

GO TO STEP 5

5.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the power switch off and wait for at least 30 seconds.

NEXT

6.

READ VALUE USING TECHSTREAM (TEST VALUE OF AIR FUEL RATIO SENSOR)

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine / Monitor / Current Monitor / O2 Sensor / Current.

Powertrain > Engine > Monitor

(c) Check that the status of O2 Sensor is Complete. If the status is still Incomplete, drive the vehicle according to the driving pattern again.

(d) Enter the following menus: Powertrain / Engine / Monitor / Current Monitor / O2 Sensor / Details / RANGE B1S1.

Powertrain > Engine > Monitor

(e) Check the test value of the air fuel ratio sensor output current during fuel-cut.

Test Value

Proceed to

Within normal range

(0.7 mA or higher, and less than 2.2 mA)

A

Outside normal range

(Less than 0.7 mA, or 2.2 mA or higher)

B

B

GO TO STEP 17

A

7.

PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

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Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.

(f) Idle the engine for 5 minutes or more with park (P) selected.

(g) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / A/F (O2) Sensor Voltage B1S1 and O2 Sensor Voltage B1S2.

Powertrain > Engine > Active Test

Active Test Display

Control the Injection Volume for A/F Sensor

Data List Display

A/F (O2) Sensor Voltage B1S1

O2 Sensor Voltage B1S2

(h) Change the fuel injection volume using the Techstream, and monitor the output voltage of the air fuel ratio sensor (A/F (O2) Sensor Voltage B1S1) and heated oxygen sensor (O2 Sensor Voltage B1S2) displayed on the Techstream.

HINT:

  • The Active Test "Control the Injection Volume for A/F Sensor" can be used to lower the fuel injection volume by 12.5% or increase the injection volume by 12.5%.
  • The air fuel ratio sensor is displayed as A/F (O2) Sensor Voltage B1S1, and the heated oxygen sensor is displayed as O2 Sensor Voltage B1S2 on the Techstream.
  • The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
  • If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.

Standard

Techstream Display (Sensor)

Injection Volume

Status

Voltage

A/F (O2) Sensor Voltage B1S1

(Air fuel ratio)

12.5%

Rich

Below 3.1 V

-12.5%

Lean

Higher than 3.4 V

O2 Sensor Voltage B1S2

(Heated oxygen)

12.5%

Rich

Higher than 0.55 V

-12.5%

Lean

Below 0.4 V

Status of A/F (O2) Sensor Voltage B1S1

Status of O2 Sensor Voltage B1S2

Air Fuel Ratio Condition and Air Fuel Ratio Sensor Condition

Proceed to

Lean

Lean

Actual air fuel ratio lean

A

Rich

Rich

Actual air fuel ratio rich

Lean

Lean/Rich

Air fuel ratio sensor malfunction

B

Rich

Lean/Rich

Air fuel ratio sensor malfunction

Lean/Rich

Lean/Rich

Normal

C

  • Lean: While performing the Active Test "Control the Injection Volume for A/F Sensor", the air fuel ratio sensor output voltage (A/F (O2) Sensor Voltage B1S1) is consistently higher than 3.4 V, and the heated oxygen sensor output voltage (O2 Sensor Voltage B1S2) is consistently below 0.4 V.
  • Rich: While performing the Active Test "Control the Injection Volume for A/F Sensor", the air fuel ratio sensor output voltage (A/F (O2) Sensor Voltage B1S1) is consistently below 3.1 V, and the heated oxygen sensor output voltage (O2 Sensor Voltage B1S2) is consistently higher than 0.55 V.
  • Lean/Rich: While performing the Active Test "Control the Injection Volume for A/F Sensor", the output voltage of the fuel ratio sensor (A/F (O2) Sensor Voltage B1S1) or heated oxygen sensor (O2 Sensor Voltage B1S2) alternates correctly.

HINT:

Refer to "Data List / Active Test" [A/F (O2) Sensor Voltage B1S1 and O2 Sensor Voltage B1S2].

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B

GO TO STEP 17

C

GO TO STEP 15

A

8.

CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leaks.

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OK:

No leaks from the intake system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the intake system.

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NG

REPAIR OR REPLACE INTAKE SYSTEM

OK

9.

CHECK FOR EXHAUST GAS LEAK

(a) Check for exhaust gas leaks.

OK:

No gas leaks in exhaust system.

HINT:

Perform "Inspection After Repair" after repairing or replacing the exhaust system.

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NG

REPAIR OR REPLACE EXHAUST SYSTEM

OK

10.

PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

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Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.

HINT:

The A/C switch and all accessories should be off.

(f) Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Intake Manifold Absolute Pressure and Engine Independent.

Powertrain > Engine > Active Test

Active Test Display

Control the EGR Step Position

Data List Display

Intake Manifold Absolute Pressure

Engine Independent

(g) Confirm that the value of Data List item Engine Independent is "Operate" then check the value of Intake Manifold Absolute Pressure while performing the Active Test.

NOTICE:

  • Do not leave the EGR valve open for 10 seconds or more during the Active Test.
  • Be sure to return the EGR valve to step 0 when the Active Test is completed.
  • Do not open the EGR valve 30 steps or more during the Active Test.

OK:

The value of Intake Manifold Absolute Pressure changes in response to the EGR step position when the value of Engine Independent is "Operate".

Standard:

-

Control the EGR Step Position (Active Test)

0 Steps

0 to 30 Steps

Intake Manifold Absolute Pressure

(Data List)

(EGR valve is fully closed)

Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed

HINT:

  • If the value of Data List item Engine Independent is "Not Opr" when the engine is idling, charge control is being performed. Perform the Active Test after charge control is complete ("Operate" is displayed).
  • While performing the Active Test, if the increase in the value of Intake Manifold Absolute Pressure is small, the EGR valve assembly may be malfunctioning.
  • Even if the EGR valve assembly is malfunctioning, rough idling or an increase in the value of Intake Manifold Absolute Pressure may occur while performing the Active Test. However, the amount that the value of Intake Manifold Absolute Pressure increases will be smaller than normal.
OK

GO TO STEP 12

NG

11.

INSPECT EGR VALVE ASSEMBLY

(a) Remove the EGR valve assembly.

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(b) Check if the EGR valve is stuck open.

OK:

EGR valve is tightly closed.

HINT:

Perform "Inspection After Repair" after replacing the EGR valve assembly.

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NG

REPLACE EGR VALVE ASSEMBLY

OK

12.

CHECK FUEL PRESSURE

(a) Check the fuel pressure.

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NG

GO TO STEP 14

OK

13.

INSPECT FUEL INJECTOR ASSEMBLY

(a) Inspect the fuel injector assembly (whether fuel volume is high or low, and whether injection pattern is poor).

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HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly.

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OK

GO TO STEP 17

NG

REPLACE FUEL INJECTOR ASSEMBLY

14.

INSPECT FUEL PUMP

(a) Inspect the fuel pump.

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HINT:

Perform "Inspection After Repair" after replacing the fuel pump.

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OK

REPAIR OR REPLACE FUEL LINE

NG

REPLACE FUEL PUMP

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w/o Canister Pump Module: 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; 2ZR-FXE (FUEL): FUEL PUMP (w/o Canister Pump Module): REMOVAL

15.

PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Put the engine in Inspection Mode (Maintenance Mode).

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: INSPECTION MODE PROCEDURE

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(e) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.

HINT:

The A/C switch and all accessories should be off.

(f) Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Intake Manifold Absolute Pressure and Engine Independent.

Powertrain > Engine > Active Test

Active Test Display

Control the EGR Step Position

Data List Display

Intake Manifold Absolute Pressure

Engine Independent

(g) Confirm that the value of Data List item Engine Independent is "Operate" then check the value of Intake Manifold Absolute Pressure while performing the Active Test.

NOTICE:

  • Do not leave the EGR valve open for 10 seconds or more during the Active Test.
  • Be sure to return the EGR valve to step 0 when the Active Test is completed.
  • Do not open the EGR valve 30 steps or more during the Active Test.

OK:

The value of Intake Manifold Absolute Pressure changes in response to the EGR step position when the value of Engine Independent is "Operate".

Standard:

-

Control the EGR Step Position (Active Test)

0 Steps

0 to 30 Steps

Intake Manifold Absolute Pressure

(Data List)

(EGR valve is fully closed)

Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed

HINT:

  • If the value of Data List item Engine Independent is "Not Opr" when the engine is idling, charge control is being performed. Check the engine speed after charge control is complete ("Operate" is displayed).
  • While performing the Active Test, if the increase in the value of Intake Manifold Absolute Pressure is small, the EGR valve assembly may be malfunctioning.
  • Even if the EGR valve assembly is malfunctioning, rough idling or an increase in the value of Intake Manifold Absolute Pressure may occur while performing the Active Test. However, the amount that the value of Intake Manifold Absolute Pressure increases will be smaller than normal.
OK

GO TO STEP 17

NG

16.

INSPECT EGR VALVE ASSEMBLY

(a) Remove the EGR valve assembly.

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; 2ZR-FXE (EMISSION CONTROL): EGR VALVE: REMOVAL

(b) Check if the EGR valve is stuck open.

OK:

EGR valve is tightly closed.

HINT:

Perform "Inspection After Repair" after replacing the EGR valve assembly.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

OK

GO TO STEP 17

NG

REPLACE EGR VALVE ASSEMBLY

17.

REPLACE AIR FUEL RATIO SENSOR

(a) Replace the air fuel ratio sensor.

Click here 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; 2ZR-FXE (ENGINE CONTROL): AIR FUEL RATIO SENSOR: REMOVAL

HINT:

Perform "Inspection After Repair" after replacing the air fuel ratio sensor.

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

NEXT

18.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the power switch off and wait for at least 30 seconds.

NEXT

19.

CHECK WHETHER DTC OUTPUT RECURS (DTC P219519, P219524, P219618 OR P219623)

(a) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display

All Readiness

(c) Input the DTC: P219519, P219524, P219618 or P219623.

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

A

ABNORMAL

(DTC P219519, P219524, P219618 or P219623 is output)

B

A

END

B

REPLACE ECM