SFI SYSTEM, Diagnostic DTC:P2A00

DESCRIPTION

Refer to DTC P2195 Click here.

CONFIRMATION DRIVING PATTERN

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch to ON.

3. Turn the tester on.

4. Clear the DTCs Click here.

5. Turn the ignition switch off and wait for at least 30 seconds.

6. Start the engine and warn it up (until the engine coolant temperature 75°C (167°F)). [A]

7. Turn the tester on.

8. Drive the vehicle at between 64 km/h and 120 km/h (40 mph and 75 mph) for 3 minutes. However, the vehicle should be driven at a constant speed. [B]

   CAUTION:

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

9. Enter the following menus: Powertrain / Engine and ECT / DTC / Pending.

10. Read the pending DTC.

11. If a pending DTC is output, the system is malfunctioning.

    Tech Tips

    If a pending DTC is not output, perform the following procedure.

12. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

13. Input the DTC P2A00.

14. Check the DTC judgment result.

    Intelligent Tester

    Tester 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
    UNKNOWN	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

    Tech Tips

    
    

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

    • If the judgment result shows INCOMPLETE or UNKNOWN, perform step [B] and check the DTC judgment result again.

WIRING DIAGRAM

Refer to DTC P2195 Click here.

INSPECTION PROCEDURE

• Following the Control the Injection Volume for A/F Sensor procedure enables technicians to check and graph the voltage outputs of both the air fuel ratio and heated oxygen sensors.

• To display the graph, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / A/F Control System / AF Voltage B1S1 and O2S B1S2.

PROCEDURE

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2A00)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the tester on.

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

   5. Read DTCs.

      Result

      Result	Proceed to
      DTC P2A00 is output	A
      DTC P2A00 and other DTCs are output	B

      Tech Tips

      If any DTCs other than P2A00 are output, troubleshoot those DTCs first.

   
   

   B

   GO TO DTC CHART Click here

   A

2. INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE)

   
   
   1. 

      Text in Illustration

      *1	Component without harness connected (Air Fuel Ratio Sensor)

      Disconnect the air fuel ratio sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 Ω 1 (HA1A) - 4 (A1A-) Always 10 kΩ or higher

   3. Reconnect the air fuel ratio sensor.

   
   

   NG

   REPLACE AIR FUEL RATIO SENSOR Click here

   OK

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

   
   

   1. Disconnect the air fuel ratio sensor connector.

   2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition B34-2 (+B) - Body ground Ignition switch ON 11 to 14 V

   4. Turn the ignition switch off.

   5. Disconnect the ECM connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition B34-3 (A1A+) - B8-103 (A1A+) Always Below 1 Ω B34-4 (A1A-) - B8-126 (A1A-) Always Below 1 Ω B34-1 (HA1A) - B8-104 (HA1A) Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition B34-3 (A1A+) or B8-103 (A1A+) - Body ground Always 10 kΩ or higher B34-4 (A1A-) or B8-126 (A1A-) - Body ground Always 10 kΩ or higher B34-1 (HA1A) or B8-104 (HA1A) - Body ground Always 10 kΩ or higher

   7. Reconnect the ECM connector.

   8. Reconnect the air fuel ratio sensor connector.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00)

   
   

   1. Perform the confirmation driving pattern.

      Tech Tips

      Refer to "CONFIRMATION DRIVING PATTERN".

      Result

      Result	Proceed to
      NORMAL	A
      ABNORMAL	B

   
   

   B

   REPLACE AIR FUEL RATIO SENSOR Click here

   A

   CHECK FOR INTERMITTENT PROBLEMS Click here

5. REPLACE AIR FUEL RATIO SENSOR

   
   

   1. Replace the air fuel ratio sensor Click here.

   
   

   NEXT

6. CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00)

   
   

   1. Perform the confirmation driving pattern.

      Tech Tips

      Refer to "CONFIRMATION DRIVING PATTERN".

      Result

      Result	Proceed to
      NORMAL	A
      ABNORMAL	B

   
   

   B

   PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION) Click here

   A

   END

7. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the tester on.

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

      Tech Tips

      The A/C switch and all accessory switches should be off.

   5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

   6. Check the MAP and Engine Speed in Date List at the idling condition while performing Active Test.

      OK
      MAP and idling condition change in response to EGR step position.

      Standard
      - EGR Step Position (Active Test) 0 Steps 0 to 30 Steps Idling condition Steady idling Idling changes from steady to rough idling MAP (Data List) MAP value is 20 to 40 kPa (150 to 300 mmHg) (EGR valve is fully closed) MAP value is at least +10 kPa (75 mmHg) higher than when EGR valve is fully closed

      Tech Tips

      
      

      • 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 Active Test is completed.

      Result

      Result	Proceed to
      NG	A
      OK	B

   
   

   B

   REPLACE ECM Click here

   A

8. INSPECT EGR VALVE ASSEMBLY

   
   

   1. Remove the EGR valve assembly Click here.

   2. Check for contamination between the EGR valve and housing.

      OK
      No leaks or blockage

   3. Reinstall the EGR valve assembly Click here.

   
   

   NG

   REPLACE EGR VALVE ASSEMBLY Click here

   OK

9. REPLACE ECM

   
   

   1. Replace the ECM Click here.

   
   

   NEXT

10. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    
    

    1. Perform the confirmation driving pattern.

       Tech Tips

       Refer to the CONFIRMATION DRIVING PATTERN.

       Result

       Result	Proceed to
       NORMAL	A
       ABNORMAL	B

    
    

    B

    REPLACE ECM Click here

    A

    END