ECD SYSTEM(for Swirl Control Valve), Diagnostic DTC:P22AB,P22AC,P22AD,P22AE and P22B2

DTC Code DTC Name
P22AB O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 2
P22AC O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 2
P22AD O2 Sensor Positive Current Control Circuit High Bank 1 Sensor 2
P22AE O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 2
P22B2 O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 2

DESCRIPTION

Refer to DTC P0030 (Click here).

DTC No.

DTC Detection Condition

Trouble Area

P22AB

The air-fuel ratio is not detected as rich, but the output of the air fuel ratio sensor (for sensor 2) is less than the lower limit value for 2 seconds.

(3 trip detection logic)

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

  • Air fuel ratio sensor (for sensor 2)

  • ECM

DTC No.

DTC Detection Condition

Trouble Area

P22AC

Ground short in air fuel ratio sensor (for sensor 2) circuit for 2 seconds.

(3 trip detection logic)

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

  • Air fuel ratio sensor (for sensor 2)

  • ECM

DTC No.

DTC Detection Condition

Trouble Area

P22AD

Battery short in air fuel ratio sensor (for sensor 2) circuit for 2 seconds.

(3 trip detection logic)

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

  • Air fuel ratio sensor (for sensor 2)

  • ECM

DTC No.

DTC Detection Condition

Trouble Area

P22AE

Air fuel ratio sensor (for sensor 2) is detected if the signal voltage is more than 3 V and the non-linearised value of the air fuel ratio sensor (for sensor 2) signal is greater than 1.5 V or less than -1.3 V for 0.5 seconds.

(3 trip detection logic)

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

  • Air fuel ratio sensor (for sensor 2)

  • ECM

DTC No.

DTC Detection Condition

Trouble Area

P22B2

Air fuel ratio sensor (for sensor 2) is detected if the signal voltage is more than 3 V and the non-linearised value of the air fuel ratio sensor (for sensor 2) signal lies between -0.1 V and 0.1 V for 0.5 seconds.

(3 trip detection logic)

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

  • Air fuel ratio sensor (for sensor 2)

  • ECM
Table 1. Related Data List

DTC No.

Data List

P22AB

P22AC

P22AD

P22AE

P22B2

O2 Sensor Lambda Bank 1 Sensor 2

WIRING DIAGRAM

Refer to DTC P0030 (Click here).

CAUTION / NOTICE / HINT

Note:

  • When replacing the ECM, the ECM needs Registration and Initialization (Click here).

  • After replacing the air fuel ratio sensor, the ECM needs initialization (Click here).

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE

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

    1. Disconnect the air fuel ratio sensor (for sensor 2) connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      C121-1 (AF2+) - C112-130 (AF2+)

      Always

      Below 1 Ω

      C121-2 (AF2-) - C112-133 (AF2-)

      Always

      Below 1 Ω

      C121-3 (HAF2) - C112-17 (HAF2)

      Always

      Below 1 Ω

      C121-5 (TR2) - C112-131 (TR2)

      Always

      Below 1 Ω

      C121-6 (RE2) - C112-134 (RE2)

      Always

      Below 1 Ω

      C121-1 (AF2+) or C112-130 (AF2+) - Body ground

      Always

      10 kΩ or higher

      C121-2 (AF2-) or C112-133 (AF2-) - Body ground

      Always

      10 kΩ or higher

      C121-3 (HAF2) or C112-17 (HAF2) - Body ground

      Always

      10 kΩ or higher

      C121-5 (TR2) or C112-131 (TR2) - Body ground

      Always

      10 kΩ or higher

      C121-6 (RE2) or C112-134 (RE2) - Body ground

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

  2. REPLACE AIR FUEL RATIO SENSOR (FOR SENSOR 2)

    1. Replace the air fuel ratio sensor (for sensor 2) (Click here).

    2. Perform the O2 sensor learning value reset (Click here).

  3. CHECK WHETHER DTC OUTPUT RECURS

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs (Click here).

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Read the DTCs.

      Table 2. Result

      Result

      Proceed to

      DTC P22AB, P22AC, P22AD, P22AE and/or P22B2

      A

      No DTC output

      B

    END

  4. REPLACE ECM

    1. Replace the ECM (Click here).

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  5. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

  6. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs (Click here).

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Confirm that the DTC is not output again.

    END