Toyota Yaris: Sfi System / A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2 Circuit Current Below Threshold (P227118)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2 Circuit Current Below Threshold (P227118)

DESCRIPTION

Refer to DTC P003612.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Note

P227118

A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2 Circuit Current Below Threshold

While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor (sensor 2) current is less than 7.5 mA for 0.5 seconds or more (2 trip detection logic).

  • Air fuel ratio sensor (sensor 2)
  • Intake system
  • Gas leak from exhaust system
  • Fuel pressure (for high pressure side)
  • Fuel pressure (for low pressure side)
  • Port fuel injector assembly
  • Direct fuel injector assembly
  • Fuel system
  • ECM

Comes on

SAE: P2271

HINT:

  • DTC P227118 indicate malfunctions related to the sensor 2 air fuel ratio sensor circuit.
  • When any of these DTCs are stored, check the air fuel ratio sensor (sensor 2) current output by entering the following menus on the GTS: Powertrain / Engine / Data List / A/F (O2) Sensor Current B1S2.
  • Short-term fuel trim values can also be read using the GTS.
  • If an air fuel ratio sensor (sensor 2) malfunction is detected, the ECM will store a DTC.

MONITOR DESCRIPTION

A rich air fuel mixture causes a low air fuel ratio sensor (sensor 2) current, and a lean air fuel mixture causes a high air fuel ratio sensor (sensor 2) 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 (sensor 2) current during fuel-cut and detects any abnormal current values.

If the air fuel ratio sensor (sensor 2) output is less than 7.5 mA for 0.5 seconds or more of cumulative time, the ECM stores DTC P227118 (stuck on low side).

MONITOR STRATEGY

Required Sensors/Components (Main)

Air fuel ratio sensor (sensor 2)

Required Sensors/Components (Related)

Crankshaft position sensor

Engine coolant temperature sensor

Throttle position sensor

Frequency of Operation

Once per driving cycle

TYPICAL ENABLING CONDITIONS

Auxiliary battery voltage

11 V or higher

Engine coolant temperature

75°C (167°F) or higher

Atmospheric pressure

76 kPa(abs) [11.02 psi(abs)] or higher

Fuel cut

On

TYPICAL MALFUNCTION THRESHOLDS

Duration of following condition

0.5 seconds or more

Air fuel ratio sensor (sensor 2) current

Less than 7.5 mA

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Turn the ignition switch to ON.
  7. Turn the GTS on.
  8. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher [A].
  9. Drive the vehicle at approximately 75 km/h (46 mph) for 10 minutes or more [B].

    CAUTION:

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

    HINT:

    Drive the vehicle while keeping the engine load as constant as possible.

  10. Using the GTS, enter the following menus to check the fuel-cut status: Powertrain / Engine / Data List / Idle Fuel Cut.
  11. With the shift lever in 2nd gear, drive the vehicle at 75 km/h (46 mph), and then decelerate the vehicle by releasing the accelerator pedal for 10 seconds or more to perform the fuel-cut [C].

    CAUTION:

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

    HINT:

    While "Idle Fuel Cut" on the Data List is ON, fuel-cut control is being executed.

  12. Repeat step [C] 2 times or more in one driving cycle.
  13. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending [D].
  14. 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.
  15. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  16. Input the DTC: P227118.
  17. Check the DTC judgment result.

    GTS 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 is malfunctioning.
    • If the judgment result is INCOMPLETE, drive the vehicle with the shift lever in 2nd gear, and then perform step [C] again.

WIRING DIAGRAM

Refer to DTC P003612.

Click here

CAUTION / NOTICE / HINT

NOTICE:

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

HINT:

  • Read Freeze Frame Data using the GTS. 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.
  • Sensor 1 refers to the sensor closest to the engine assembly.
  • Sensor 2 refers to the sensor farthest away from the engine assembly.

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P227118)

(a) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

P227118 is output

A

P227118 and other DTCs are output

B

HINT:

If any DTCs other than P227118 or P227318 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) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(b) Turn the ignition switch off and wait for at least 30 seconds.

NEXT

4.

CHECK WHETHER DTC OUTPUT RECURS (DTC P227118)

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

(b) Enter the following menus.

Powertrain > Engine > Utility

Tester Display

All Readiness

(c) Input the DTC: P227118.

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

A

ABNORMAL

(P227118 is output)

B

A

DTC CAUSED BY RUNNING OUT OF FUEL

B

GO TO STEP 5

5.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(b) Turn the ignition switch off and wait for at least 30 seconds.

NEXT

6.

READ VALUE USING GTS (A/F (O2) SENSOR CURRENT)

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

(b) Enter the following menus.

Powertrain > Engine > Data List

Tester Display

A/F (O2) Sensor Current B1S2

(c) Check the test value of the air fuel ratio sensor output (sensor 2) current during fuel-cut, referring to the Driving Pattern Detail for [C] in the Confirmation Driving Pattern.

HINT:

  • To measure the air fuel ratio sensor (sensor 2) current precisely, perform the fuel-cut operation as long as possible.
  • If it is difficult to measure the air fuel ratio sensor (sensor 2) current, use the snapshot function of the GTS.

Test Value

Proceed to

Within normal range (7.5 mA or higher)

A

Outside normal range (Less than 7.5 mA)

B

B

GO TO STEP 15

A

7.

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

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

(b) Warm up the air fuel ratio sensors at an engine speed of 2500 rpm for 90 seconds.

(c) Enter the following menus.

Powertrain > Engine > Active Test

Active Test Display

Control the Injection Volume for A/F Sensor

Data List Display

A/F (O2) Sensor Current B1S1

A/F (O2) Sensor Current B1S2

(d) Perform the Control the Injection Volume for A/F Sensor operation with the engine idling.

(e) Monitor the output values of the air fuel ratio sensor (sensor 1) and air fuel ratio sensor (sensor 2) (A/F (O2) Sensor Current B1S1 and A/F (O2) Sensor Current B1S2 displayed on the GTS.

HINT:

  • The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 12.5%.
  • The air fuel ratio sensor (sensor 1) has an output delay of a few seconds and the air fuel ratio sensor (sensor 2) has a maximum output delay of approximately 20 seconds.
  • If the sensor output value does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.
Standard

GTS Display (Sensor)

Injection Volume

Status

Current

A/F (O2) Sensor Current B1S1

(Air fuel ratio (sensor 1))

12.5%

Rich

Below -0.075 mA

-12.5%

Lean

More than 0.037 mA

A/F (O2) Sensor Current B1S2

(Air fuel ratio (sensor 2))

12.5%

Rich

Below -0.86 mA

-12.5%

Lean

More than 0.33 mA

Status of A/F (O2) Sensor Current B1S1

Status of A/F (O2) Sensor Current B1S2

Air Fuel Ratio Condition and Air Fuel Ratio Sensor (Sensor 2) Condition

Proceed to

Lean

Lean

Actual air fuel ratio lean

A

Rich

Rich

Actual air fuel ratio rich

Lean/Rich

Lean

Air fuel ratio sensor (sensor 2) malfunction

B

Lean/Rich

Rich

Air fuel ratio sensor (sensor 2) malfunction

Lean/Rich

Lean/Rich

Normal

  • Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output current (A/F (O2) Sensor Current B1S1) is consistently more than 0.037 mA, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2) is consistently more than 0.33 mA.
  • Rich: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output current (A/F (O2) Sensor Current B1S1) is consistently below -0.075 mA, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2) is consistently below -0.86 mA.
  • Lean/Rich: During the Control the Injection Volume for A/F Sensor Active Test, the output current of the air fuel ratio sensor (sensor 1) or air fuel ratio sensor (sensor 2) alternate correctly.

HINT:

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

Click here

B

GO TO STEP 15

A

8.

CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leaks.

Click here

OK:

No leaks in the intake system.

HINT:

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

Click here

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.

Click here

NG

REPAIR OR REPLACE EXHAUST SYSTEM

OK

10.

CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)

(a) Check the fuel pressure (for low pressure side).

Click here

NG

GO TO STEP 14

OK

11.

INSPECT PORT FUEL INJECTOR ASSEMBLY

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

Click here

HINT:

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

Click here

NG

REPLACE PORT FUEL INJECTOR ASSEMBLY

OK

12.

READ VALUE USING GTS (FUEL PRESSURE (HIGH))

(a) Start the engine.

(b) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.

(c) Enter the following menus.

Powertrain > Engine > Data List

Tester Display

Fuel Pressure (High)

Injection Mode

(d) According to the display on the GTS, read the Data List.

Standard:

GTS Display

Condition

Specified Condition

Fuel Pressure (High)

  • Shift lever position: neutral
  • A/C: Off
  • Engine warmed up
  • Engine Speed: 3000 rpm
  • Injection Mode: Direct

2800 to 20000 kPag

NG

REPAIR OR REPLACE FUEL SYSTEM (FOR HIGH PRESSURE SIDE)

OK

13.

INSPECT DIRECT FUEL INJECTOR ASSEMBLY

Click here

HINT:

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

Click here

OK

GO TO STEP 15

NG

REPLACE DIRECT FUEL INJECTOR ASSEMBLY

14.

CHECK FUEL LINE

(a) Check the fuel lines for leaks or blockage.

OK

GO TO FUEL PUMP CONTROL CIRCUIT

NG

REPAIR OR REPLACE FUEL SYSTEM

15.

REPLACE AIR FUEL RATIO SENSOR (SENSOR 2)

Click here

HINT:

Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).

Click here

NEXT

16.

CLEAR DTC

(a) Connect the GTS to the DLC3.

(b) Turn the ignition switch to ON

(c) Turn the GTS on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

NEXT

17.

CHECK WHETHER DTC OUTPUT RECURS (DTC P227118)

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

(b) Enter the following menus.

Powertrain > Engine > Utility

Tester Display

All Readiness

(c) Input the DTC: P227118.

(d) Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

A

ABNORMAL

(P227118 is output)

B

A

END

B

REPLACE ECM

    Barometric Pressure Sensor "A" Circuit Short to Ground (P222611,P222615)

    DESCRIPTION The atmospheric pressure sensor is built into the ECM. The ECM provides optimal control in response to atmospheric pressure fluctuations. DTC No...

    A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Ground (P22AB11,P22AB12,P22AB13,P22AB16,P22AB17,P22B211,P22B212)

    DESCRIPTION Refer to DTC P003612. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note P22AB11 A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Ground The A1B+ voltage is 1...

    Other information:

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: VC Output Circuit


    DESCRIPTION The ECM constantly generates a 5 V power source voltage from the auxiliary battery voltage supplied to the +B, +B2 (BATT) terminals to operate the microprocessor. The ECM also provides this power to the sensors through the VC output circuit...

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Relay


    InspectionINSPECTION PROCEDURE 1. INSPECT NO.1 ELECTRONIC FUEL INJECTION MAIN RELAY (EFI-MAIN NO. 1) (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω If the result is not as specified, replace the No...

    Categories

    Fuel Gauge

    The fuel gauge shows approximately how much fuel is remaining in the tank when the ignition is switched ON. We recommend keeping the tank over 1/4 full.

    Toyota Yaris. Fuel Gauge

    Full 1/4 Full Empty

    read more

     
    Copyright © 2022 www.toyaris4.com