SFI SYSTEM, Diagnostic DTC:P2444, P2445

DTC Code DTC Name
P2444 Secondary Air Injection System Pump Stuck On Bank1
P2445 Secondary Air Injection System Pump Stuck Off Bank1

DESCRIPTION

Refer to P0412 Click here.

DTC No. DTC Detection Condition Trouble Area
P2444 Secondary air pressure is higher than 2.5 kPa (19 mmHg) despite the ECM commanding the air pump to turn off (2 trip detection logic).

  • Short in air pump circuit

  • Open or short in pressure sensor circuit

  • Pressure sensor

  • Air injection control driver

  • ECM
P2445 Secondary air pressure is below 1 kPa (8 mmHg) despite the ECM commanding the air pump to turn on (2 trip detection logic).

  • Air pump assembly

  • Open in air pump circuit

  • Secondary air injection system piping

  • Pressure sensor

  • Open or short in pressure sensor circuit

  • Air injection control driver

  • EGR valve assembly

  • ECM

  • Open or short in air pump heater circuit

  • Air pump heater relay (AI PMP HTR)

MONITOR DESCRIPTION

The ECM monitors the pressure in the secondary air passage using the pressure sensor located on the air switching valve of the secondary air injection system. The sensor measures the pressure in the secondary air passage and transmits a signal to the ECM.

If either of the following conditions occurs, the ECM interprets it as a malfunction of the secondary air injection system, and illuminates the MIL and stores a DTC:


Example:


CONFIRMATION DRIVING PATTERN

Note


  • This Secondary Air Injection Check only allows technicians to operate the secondary air injection system for a maximum of 5 seconds. Furthermore, the check can only be performed up to 4 times per trip. If the test is repeated, intervals of at least 30 seconds are required between checks. While secondary air injection system operation using the GTS is prohibited, the GTS display indicates the prohibition (WAIT or ERROR). If ERROR is displayed on the GTS during the test, stop the engine for 10 minutes, and then try again.

  • Performing Secondary Air Injection Check repeatedly may cause damage to the secondary air injection system. If it is necessary to repeat the check, leave an interval of several minutes between System Check operations to prevent the system from overheating.

  • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the engine switch turned on (IG) or the engine running.

  • Turn the engine switch off when the Secondary Air Injection Check operation finishes.


  1. Start the engine and warm it up.

  2. Turn the engine switch off.

  3. Connect the GTS to the DLC3.

  4. Turn the engine switch on (IG).

  5. Turn the GTS on.

  6. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Click here.

  7. Turn the engine switch off and wait for at least 30 seconds.

  8. Turn the engine switch on (IG) and turn the GTS on.

  9. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Automatic Mode.

  10. Start the engine after the GTS initialization is finished.

  11. Perform the System Check operation by pressing ENTER (Next).

  12. Perform the following to confirm the secondary air injection system pending codes: Press ENTER (Exit).

  13. Check for pending DTCs.

    OK
    No pending DTC is output.

  14. After "Secondary Air Injection Check" is completed, check for All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  15. Input the DTC: P2444or P2445.

  16. 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
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

  17. Turn the engine switch off.

WIRING DIAGRAM

Refer to DTC P0412 Click here.

INSPECTION PROCEDURE

Tech Tips


  • By using the GTS to perform the Secondary Air Injection Check operation in the System Check, the air-fuel ratio and the pressure in the secondary air injection system passage can be checked while the secondary air injection system is operating. This helps technicians to troubleshoot the system when it malfunctions. Furthermore, pending codes also can be checked by performing Utility / Secondary Air Injection Check / Automatic Mode after the repair.

  • 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, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

Tech Tips


  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

PROCEDURE


  1. CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2444 OR P2445)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Read DTCs.

      Result
      Result Proceed to
      P2444 and/or P2445 is output A
      P2444 and/or P2445 and P0418 are output B
      P2444 and/or P2445 and other DTCs (except P0418) are output C

      Tech Tips

      If any DTCs other than P0418, P2444 and/or P2445 are output, troubleshoot those DTCs first.


    B

    PERFORM ACTIVE TEST USING GTS (SECONDARY AIR INJECTION SYSTEM OPERATION) Click here

    C

    GO TO AIR PUMP INSPECTION PROCEDURE Click here

    D

    GO TO DTC CHART Click here

    A

  2. CHECK FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG) and turn the GTS on.

    3. Read the values of Air Pump Freeze, Air Switching Valve Freeze and Air Switching Valve2 Freeze from the freeze frame data recorded previously.

    4. Referring to the following table, proceed to the appropriate step according to the result of the data reading.

      Result
      Result Proceed to
      Air Pump Freeze Air Switching Valve Freeze Air Switching Valve2 Freeze
      OFF OFF OFF A
      Except above B

    B

    PERFORM ACTIVE TEST USING GTS (SECONDARY AIR INJECTION SYSTEM OPERATION) Click here

    A

  3. PERFORM ACTIVE TEST USING GTS (ACTIVATE THE AIR PUMP HEATER)


    1. A01EQF4E05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Air Pump Assembly)

      Disconnect the air pump connector.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG) and turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT/ Active Test / Activate the Air Pump Heater.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C57-1 (APH+) - Body ground Activate the Air Pump Heater is ON 11 to 14 V

    6. Reconnect the air pump connector.


    NG

    INSPECT AIR PUMP HEATER RELAY (AI PMP HTR) Click here

    OK

  4. INSPECT AIR PUMP ASSEMBLY (HEATER RESISTANCE)


    1. Inspect the air pump assembly Click here.


    NG

    REPLACE AIR PUMP Click here

    OK

  5. INSPECT AIR PUMP HEATER RELAY (AI PMP HTR)


    1. Inspect the Air pump heater relay (AI PMP HTR) Click here.


    NG

    REPLACE AIR PUMP HEATER RELAY (AI PMP HTR)

    OK

  6. CHECK AIR PUMP HEATER RELAY (AI PMP HTR) (POWER SOURCE)


    1. Remove the Air pump heater relay (AI PMP HTR).

    2. A01ER6UE01
      Text in Illustration
      *1 Engine Room Relay Block
      *2 Air pump heater relay (AI PMP HTR)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Air pump heater relay (AI PMP HTR) terminal 5 - Body ground Always 11 to 14 V

    3. Reinstall the Air pump heater relay (AI PMP HTR).


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR


    1. Remove the Air pump heater relay (AI PMP HTR).

    2. Disconnect the air pump connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Air pump heater relay (AI PMP HTR) terminal 3 - C57-1 (APH+) Always Below 1 Ω
      C57-3 (APHG) - Body ground Always Below 1 Ω
      Air pump heater relay (AI PMP HTR) terminal 3 or C57-1 (APH+) - Body ground Always 10 kΩ or higher

    4. Reinstall the Air pump heater relay (AI PMP HTR).

    5. Reconnect the air pump connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. PERFORM ACTIVE TEST USING GTS (SECONDARY AIR INJECTION SYSTEM OPERATION)


    1. Start the engine and warm it up.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Manual Mode / AIR PUMP: ON, ASV1: OPEN, ASV2: OPEN and AIR PUMP: OFF, ASV1: CLOSE, ASV2: CLOSE.

      Tech Tips

      When Manual Mode is selected, the GTS initialization (atmospheric pressure measurement) is performed automatically. The initialization takes 10 seconds. After the initialization, AIR PUMP and ASV operation can be selected.

    7. Start the engine.

    8. Perform the secondary air injection system forced operation while the engine is idling.

    9. Check that the air pump (AIR PUMP), air switching valve (ASV) and pressure in the secondary air injection system passage (PRESSURE) displayed on the GTS indicate the conditions shown in the table below.

      Standard
      GTS Operation Air Pump Air Switching Valve PRESSURE*
      AIR PUMP: ON, ASV: OPEN ON ON 1 kPa or higher [A]
      AIR PUMP: OFF, ASV: CLOSE OFF OFF Below 2.5 kPa [B]

      *: Average pumping pressure. The pressure should be 1 kPa or higher when the secondary air injection system operates.

      Standard
      The pressures for [A] and [B] should differ by 1 kPa or more.

    10. Turn the engine switch off.

      Note


      • This Secondary Air Injection Check only allows technicians to operate the secondary air injection system for a maximum of 5 seconds. Furthermore, the check can only be performed up to 4 times per trip. If the test is repeated, intervals of at least 30 seconds are required between checks. While secondary air injection system operation using the GTS is prohibited, the GTS display indicates the prohibition (WAIT or ERROR). If ERROR is displayed on the GTS during the test, stop the engine for 10 minutes, and then try again.

      • Performing Secondary Air Injection Check repeatedly may cause damage to the secondary air injection system. If it is necessary to repeat the check, leave an interval of several minutes between System Check operations to prevent the system from overheating.

      • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the engine switch turned on (IG) or the engine running.

      • Turn the engine switch off when the Secondary Air Injection Check operation finishes.


    NG

    INSPECT AIR SWITCHING VALVE ASSEMBLY (PRESSURE SENSOR) Click here

    OK

  9. CHECK WHETHER DTC OUTPUT RECURS (DTC P2444, P2445 AND/OR P2247)


    1. Start the engine and warm it up.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Clear DTCs (if stored) Click here.

    7. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Automatic Mode.

    8. Start the engine after the GTS initialization is finished.

    9. Perform the System Check operation by pressing ENTER (Next).

    10. Perform the following to confirm the secondary air injection system pending codes: Press the Exit button.

    11. Check pending DTCs.

    12. Turn the engine switch off.

      Note


      • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the engine switch turned on (IG) or the engine running.

      • Turn the engine switch off when the Secondary Air Injection Check operation finishes.

      Result
      Result Proceed to
      P2444 or P2445 is output A
      No pending DTC is output B

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  10. INSPECT AIR SWITCHING VALVE ASSEMBLY (PRESSURE SENSOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Air pump pressure (Absolute) and Air Pump2 Pressure (Absolute).

    5. Check the pressure displayed on the GTS.

      Standard pressure
      45 to 135 kPa

      Tech Tips

      The GTS displays the air pump pressure as absolute pressure.

      Result
      Result Proceed to
      OK A
      NG (for Bank 1) B
      NG (for Bank 2) C

    B

    REPLACE AIR SWITCHING VALVE ASSEMBLY Click here

    C

    REPLACE AIR SWITCHING VALVE ASSEMBLY Click here

    A

  11. CHECK SECONDARY AIR INJECTION SYSTEM PIPE CONNECTIONS

    A01EP83

    1. Check that all the pipes and hoses between the air pump and air switching valve are securely connected.

    2. Inspect the pipes and hoses for blockages and damage.

      OK
      Secondary air injection system piping has no blockages or damage.

    NG

    REPAIR OR REPLACE SECONDARY AIR INJECTION SYSTEM

    OK

  12. INSPECT AIR INJECTION CONTROL DRIVER (AIR INJECTION CONTROL DRIVER POWER SOURCE CIRCUIT)

    A01EROME10
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Air Injection Control Driver)

    1. Disconnect the air injection control driver connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C30-1 (E) - Body ground Always Below 1 Ω

    3. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C29-1 (BATT) - Body ground Always 11 to 14 V (near battery voltage)
      C30-5 (+B) - Body ground Engine switch on (IG) 11 to 14 V (near battery voltage)

    NG

    REPAIR OR REPLACE AIR INJECTION CONTROL DRIVER POWER SOURCE CIRCUIT

    OK

  13. CHECK HARNESS AND CONNECTOR (ECM - AIR INJECTION CONTROL DRIVER)


    1. Disconnect the ECM connector.

    2. Disconnect the air injection control driver connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C54-54 (AIRP) - C30-4 (SIP) Always Below 1 Ω
      C54-54 (AIRP) or C30-4(SIP) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. CHECK AIR PUMP ASSEMBLY


    1. Inspect the air pump assembly Click here.


    OK

    PERFORM ACTIVE TEST USING GTS Click here

    NG

    CHECK WHETHER DTC OUTPUT RECURS (DTC P2444, P2445 AND/OR P2247) Click here

  15. REPLACE AIR PUMP ASSEMBLY


    1. Replace the air pump assembly Click here.


    NEXT

  16. CHECK WHETHER DTC OUTPUT RECURS (DTC P2444 OR P2445)


    1. Start the engine and warm it up.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Clear DTCs (if stored) Click here.

    7. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Automatic Mode.

    8. Start the engine after the GTS initialization is finished.

    9. Perform the System Check operation by pressing ENTER (Next).

    10. Perform the following to confirm the secondary air injection system pending codes: Press the Exit button.

    11. Check pending DTCs.

      OK
      No pending DTC is output.

    12. Turn the engine switch off.

      Note


      • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the engine switch turned on (IG) or the engine running.

      • Turn the engine switch off when the Secondary Air Injection Check operation finishes.


    NG

    PERFORM ACTIVE TEST USING GTS Click here

    OK

    END

  17. PERFORM ACTIVE TEST USING GTS


    1. A01ERHME36
      Text in Illustration
      *1 Air Injection Control Driver
      *2 ECM
      *a

      Front view of wire harness connector

      (to Air Injection Control Driver)

      Disconnect the air injection control driver connector.

    2. Connect terminals DI and SIV of the wire harness connector for the air injection control driver.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG) and turn the GTS on.

    5. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Manual Mode / AIR PUMP: ON, ASV 1: OPEN, ASV 2: OPEN.

      Tech Tips

      When Manual Mode is selected, the GTS initialization (atmospheric pressure measurement) is performed automatically. The initialization takes 10 seconds. After the initialization, AIR PUMP and ASV operation can be selected.

    6. Start the engine.

    7. Perform the secondary air injection system forced operation while the engine is idling.

    8. Measure the voltage between the SIV and E terminals of the ECM connector when the secondary air injection system is ON and OFF.

    9. Turn the engine switch off.

      Note


      • Performing Secondary Air Injection Check repeatedly may cause damage to the secondary air injection system. If it is necessary to repeat the check, leave an interval of several minutes between System Check operations to prevent the system from overheating.

      • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the engine switch turned on (IG) or the engine running.

      • Turn the engine switch off when the Secondary Air Injection Check operation finishes.

      Standard Voltage
      Tester Connection Condition Specified Condition
      C30-3 (SIV) - C30-1 (E) AIR PUMP: ON, ASV: OPEN 0.5 to 2 V
      C30-3 (SIV) - C30-1 (E) AIR PUMP: OFF, ASV: CLOSE 11 to 14 V
    10. A01ERHME37
      Text in Illustration
      *1 Air Injection Control Driver
      *2 ECM
      *a

      Front view of wire harness connector

      (to Air Injection Control Driver)

      Connect terminals DI and SIP of the wire harness connector for the air injection control driver.

    11. Connect the GTS to the DLC3.

    12. Turn the engine switch on (IG) and turn the GTS on.

    13. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Manual Mode / AIR PUMP: ON, ASV 1: OPEN, ASV 2: OPEN.

      Tech Tips

      When Manual Mode is selected, the GTS initialization (atmospheric pressure measurement) is performed automatically. The initialization takes 10 seconds. After the initialization, AIR PUMP and ASV operation can be selected.

    14. Start the engine.

    15. Perform the secondary air injection system forced operation while the engine is idling.

    16. Measure the voltage between the SIP and E terminals of the ECM connector when the secondary air injection system is ON and OFF.

    17. Turn the engine switch off.

      Note


      • Performing Secondary Air Injection Check repeatedly may cause damage to the secondary air injection system. If it is necessary to repeat the check, leave an interval of several minutes between System Check operations to prevent the system from overheating.

      • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the engine switch turned on (IG) or the engine running.

      • Turn the engine switch off when the Secondary Air Injection Check operation finishes.

      Standard Voltage
      Tester Connection Condition Specified Condition
      C30-4 (SIP) - C30-1 (E) AIR PUMP: ON, ASV: OPEN 0.5 to 2 V
      C30-4 (SIP) - C30-1 (E) AIR PUMP: OFF, ASV: CLOSE 11 to 14 V

    18. Reconnect the air injection control driver connector.


    NG

    REPLACE ECM Click here

    OK

  18. REPLACE AIR INJECTION CONTROL DRIVER


    1. Replace the air injection control driver Click here.


    NEXT

  19. CHECK WHETHER DTC OUTPUT RECURS (DTC P2444 OR P2445)


    1. Start the engine and warm it up.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

    6. Clear DTCs (if stored) Click here.

    7. Enter the following menus: Powertrain / Engine and ECT / Utility / Secondary Air Injection Check / Automatic Mode.

    8. Start the engine after the GTS initialization is finished.

    9. Perform the System Check operation by pressing ENTER (Next).

    10. Perform the following to confirm the secondary air injection system pending codes: Press the Exit button.

    11. Check pending DTCs.

      OK
      No pending DTC is output.

    12. Turn the engine switch off.

      Note


      • When performing the Secondary Air Injection Check operation after the battery cable has been reconnected, wait for 7 minutes with the engine switch turned on (IG) or the engine running.

      • Turn the engine switch off when the Secondary Air Injection Check operation finishes.


    NG

    REPLACE ECM Click here

    OK

    END