Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001QEYI
Model Year Start: 2021 Model: RAV4 Prod Date Range: [08/2020 -           ]
Title: A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P22AB11,P22AB12,P22AB13,P22AB16,P22AB17,P22B211,P22B212; A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Ground; 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]

DTC

P22AB11

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Ground

DTC

P22AB12

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Battery

DTC

P22AB13

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Open

DTC

P22AB16

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Voltage Below Threshold

DTC

P22AB17

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Voltage Above Threshold

DTC

P22B211

A/F (O2) Sensor Negative Current Control Bank 1 Sensor 2 Circuit Short to Ground

DTC

P22B212

A/F (O2) Sensor Negative Current Control Bank 1 Sensor 2 Circuit Short to Battery

DESCRIPTION

Refer to DTC P003612.

Click here 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P003612,P003613,P102A9E; HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery

HINT:

Although the DTC title say O2 sensor, these DTCs relate to the air fuel ratio sensor (sensor 2).

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P22AB11

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Ground

The A1B+ voltage is 1.43 V or less for 5 seconds or more (2 trip detection logic).

  • Short in air fuel ratio sensor (sensor 2) circuit
  • Air fuel ratio sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P22AC
  • DTC for Mexico Models: Applies

P22AB12

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Short to Battery

The A1B+ voltage is higher than 6.135 V for 5 seconds or more (2 trip detection logic).

  • Open or short in air fuel ratio sensor (sensor 2) circuit
  • Air fuel ratio sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P22AD
  • DTC for Mexico Models: Applies

P22AB13

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Open

100 seconds or more elapse after the air fuel ratio sensor (sensor 2) heater turns on and the air fuel ratio sensor (sensor 2) impedance is higher than 510 Ω (2 trip detection logic).

  • Open or short in air fuel ratio sensor (sensor 2) circuit
  • Air fuel ratio sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P22AB
  • DTC for Mexico Models: Applies

P22AB16

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Voltage Below Threshold

When A1B- voltage is higher than 2.77 V, the difference between terminals A1B+ and A1B- is 0.2 V or less for 5 seconds or more (2 trip detection logic).

  • Open or short in air fuel ratio sensor (sensor 2) circuit
  • Air fuel ratio sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P22AC
  • DTC for Mexico Models: Applies

P22AB17

A/F (O2) Sensor Positive Current Control Bank 1 Sensor 2 Circuit Voltage Above Threshold

Difference between terminals A1B+ and A1B- is higher than 1.72 V for 5 seconds or more (2 trip detection logic).

  • Open or short in air fuel ratio sensor (sensor 2) circuit
  • Air fuel ratio sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P22AD
  • DTC for Mexico Models: Applies

P22B211

A/F (O2) Sensor Negative Current Control Bank 1 Sensor 2 Circuit Short to Ground

The A1B- voltage is 1.07 V or less for 5 seconds or more (2 trip detection logic).

  • Short in air fuel ratio sensor (sensor 2) circuit
  • Air fuel ratio sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P22B3
  • DTC for Mexico Models: Applies

P22B212

A/F (O2) Sensor Negative Current Control Bank 1 Sensor 2 Circuit Short to Battery

The A1B- voltage is higher than 4.59 V for 5 seconds or more (2 trip detection logic).

  • Open or short in air fuel ratio sensor (sensor 2) circuit
  • Air fuel ratio sensor (sensor 2)
  • ECM

Comes on

DTC stored

  • SAE Code: P22B4
  • DTC for Mexico Models: Applies

MONITOR DESCRIPTION

These DTCs are stored when there is an open or short in the air fuel ratio sensor (sensor 2) circuit, or the air fuel ratio sensor (sensor 2) output value is abnormal. The voltage of the air fuel ratio sensor (sensor 2) is monitored while the ignition switch is ON, and the impedance (impedance is an electrical term that indicates the difficulty of flow of current) is checked while engine running. If the voltage of the air fuel ratio sensor (sensor 2) is outside the normal range, or the impedance is outside the normal range, the ECM illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P22AB: Air fuel ratio sensor (sensor 2) circuit open

P22AC: Air fuel ratio sensor (sensor 2) range check (A1B+ low voltage)

P22AC: Air fuel ratio sensor (sensor 2) correlation (A1B+ and A1B-)

P22AD: Air fuel ratio sensor (sensor 2) range check (A1B+ high voltage)

P22AD: Air fuel ratio sensor (sensor 2) correlation (A1B+ and A1B-)

P22B3: Air fuel ratio sensor (sensor 2) range check (A1B- low voltage)

P22B4: Air fuel ratio sensor (sensor 2) range check (A1B- high voltage)

Required Sensors/Components (Main)

Air fuel ratio sensor (sensor 2)

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

5 seconds

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

None

P22AB: Air Fuel Ratio Sensor (Sensor 2) Circuit Open

Auxiliary battery voltage

10.5 V or higher

Time after heater on

100 seconds or more

Ignition switch

ON

Air fuel ratio sensor (sensor 2) heater circuit fail (P0037, P0038, P102D)

Not detected

Air fuel ratio sensor (sensor 2) positive current control circuit range check fail (P22AC, P22AD)

Not detected

Air fuel ratio sensor (sensor 2) positive/negative current control circuit correlation fail (P22AC, P22AD)

Not detected

Air fuel ratio sensor (sensor 2) negative current control circuit range check fail (P22B3, P22B4)

Not detected

P22AC and P22AD: Air Fuel Ratio Sensor (Sensor 2) Range Check (A1B+ Low Voltage, A1B+ High Voltage)

Auxiliary battery voltage

10.5 V or higher

Ignition switch to ON

5 seconds or more

Air fuel ratio sensor (sensor 2) positive current control circuit open fail (P22AB)

Not detected

Air fuel ratio sensor (sensor 2) positive/negative current control circuit correlation fail (P22AC, P22AD)

Not detected

Air fuel ratio sensor (sensor 2) negative current control circuit range check fail (P22B3, P22B4)

Not detected

P22AC: Air Fuel Ratio Sensor (Sensor 2) Correlation (A1B+ and A1B-)

Auxiliary battery voltage

10.5 V or higher

Ignition switch to ON

5 seconds or more

A1B- terminal voltage

Higher than 2.77 V

Air fuel ratio sensor (sensor 2) positive current control circuit open fail (P22AB)

Not detected

Air fuel ratio sensor (sensor 2) positive current control circuit range check fail (P22AC, P22AD)

Not detected

Air fuel ratio sensor (sensor 2) negative current control circuit range check fail (P22B3, P22B4)

Not detected

P22AD: Air Fuel Ratio Sensor (Sensor 2) Correlation (A1B+ and A1B-)

Auxiliary battery voltage

10.5 V or higher

Ignition switch to ON

5 seconds or more

Air fuel ratio sensor (sensor 2) positive current control circuit open fail (P22AB)

Not detected

Air fuel ratio sensor (sensor 2) positive current control circuit range check fail (P22AC, P22AD)

Not detected

Air fuel ratio sensor (sensor 2) negative current control circuit range check fail (P22B3, P22B4)

Not detected

P22B3 and P22B4: Air Fuel Ratio Sensor (Sensor 2) Range Check (A1B- Low Voltage, A1B- High Voltage)

Auxiliary battery voltage

10.5 V or higher

Ignition switch to ON

5 seconds or more

Air fuel ratio sensor (sensor 2) positive current control circuit open fail (P22AB)

Not detected

Air fuel ratio sensor (sensor 2) positive/negative current control circuit correlation fail (P22AC, P22AD)

Not detected

Air fuel ratio sensor (sensor 2) positive current control circuit range check fail (P22AC, P22AD)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

P22AB: Air Fuel Ratio Sensor (Sensor 2) Circuit Open

Air fuel ratio sensor (sensor 2) impedance

Higher than 510 Ω

P22AC: Air Fuel Ratio Sensor (Sensor 2) Range Check (A1B+ Low Voltage)

A1B+ terminal voltage

1.43 V or less

P22AC: Air Fuel Ratio Sensor (Sensor 2) Sensor Correlation (A1B+ and A1B-)

Difference between A1B+ and A1B- terminal voltage

0.2 V or less

P22AD: Air Fuel Ratio Sensor (Sensor 2) Range Check (A1B+ High Voltage)

A1B+ terminal voltage

Higher than 6.135 V

P22AD: Air Fuel Ratio Sensor (Sensor 2) Sensor Correlation (A1B+ and A1B-)

Difference between A1B+ and A1B- terminal voltage

Higher than 1.72 V

P22B3: Air Fuel Ratio Sensor (Sensor 2) Range Check (A1B- Low Voltage)

A1B- terminal voltage

1.07 V or less

P22B4: Air Fuel Ratio Sensor (Sensor 2) Range Check (A1B- High Voltage)

A1B- terminal voltage

Higher than 4.59 V

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 2021 - 2022 MY RAV4 RAV4 HV [08/2020 - 10/2022]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 - 2024 MY RAV4 RAV4 HV [10/2022 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

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

    Click here 2021 - 2022 MY RAV4 RAV4 HV [08/2020 - 10/2022]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 - 2024 MY RAV4 RAV4 HV [10/2022 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the Techstream 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 Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

    Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: INSPECTION MODE PROCEDURE

  9. Start the engine and wait 5 minutes or more [A].
  10. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  11. 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.
  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  13. Input the DTC: P22AB11, P22AB12, P22AB13, P22AB16, P22AB17, P22B211 or P22B212.
  14. 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 is malfunctioning.
    • If the judgment result is INCOMPLETE, idle the engine for 5 minutes and check the DTC judgment result again.
    • [A] to [B]: 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

Refer to DTC P003612.

Click here 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P003612,P003613,P102A9E; HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

    for AWD with NICKEL METAL HYDRIDE BATTERY

    Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): VEHICLE CONTROL HISTORY

    for LITHIUM-ION BATTERY

    Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): VEHICLE CONTROL HISTORY

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here 2021 - 2022 MY RAV4 RAV4 HV [08/2020 - 10/2022]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR 2023 - 2024 MY RAV4 RAV4 HV [10/2022 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    for AWD with NICKEL METAL HYDRIDE BATTERY

    Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): VEHICLE CONTROL HISTORY

    for LITHIUM-ION BATTERY

    Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): VEHICLE CONTROL HISTORY

HINT:

  • Sensor 1 refers to the sensor closest to the engine assembly.
  • Sensor 2 refers to the sensor farthest away from the engine assembly.
  • Refer to "Data List / Active Test" [A/F (O2) Sensor Current B1S2].

    Click here 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DATA LIST / ACTIVE TEST 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DATA LIST / ACTIVE TEST 2023 - 2024 MY RAV4 RAV4 HV [10/2022 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DATA LIST / ACTIVE TEST

  • 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 TERMINAL VOLTAGE (AIR FUEL RATIO SENSOR (SENSOR 2) VOLTAGE)

*a

Front view of wire harness connector

(to Air Fuel Ratio Sensor (Sensor 2))

HINT:

Make sure that the connector is properly connected. If it is not, securely connect it and check for DTCs again.

(a) Disconnect the air fuel ratio sensor (sensor 2) connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

C29-3 (A1B+) - Body ground

Ignition switch ON

2.8 to 3.2 V

C29-4 (A1B-) - Body ground

Ignition switch ON

2.3 to 2.7 V

C29-3 (A1B+) - C29-4 (A1B-)

Ignition switch ON

0.1 to 0.9 V

HINT:

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

Click here 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

OK

REPLACE AIR FUEL RATIO SENSOR (SENSOR 2)

NG

2.

CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR (SENSOR 2) - ECM)

(a) Disconnect the air fuel ratio sensor (sensor 2) connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C29-1 (HA1B) - C45-8 (HA1B)

Always

Below 1 Ω

C29-3 (A1B+) - C45-118 (A1B+)

Always

Below 1 Ω

C29-4 (A1B-) - C45-117 (A1B-)

Always

Below 1 Ω

C29-1 (HA1B) or C45-8 (HA1B) - Body ground and other terminals

Always

10 kΩ or higher

C29-3 (A1B+) or C45-118 (A1B+) - Body ground and other terminals

Always

10 kΩ or higher

C29-4 (A1B-) or C45-117 (A1B-) - Body ground and other terminals

Always

10 kΩ or higher

OK

REPLACE ECM 2021 MY RAV4 HV [08/2020 - 12/2021]; A25A-FXS (ENGINE CONTROL): ECM: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; A25A-FXS (ENGINE CONTROL): ECM: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; A25A-FXS (ENGINE CONTROL): ECM: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; A25A-FXS (ENGINE CONTROL): ECM: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR