Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

DESCRIPTION

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACTIVATE THE VSV FOR EVAP CONTROL)

INSPECT PURGE VSV

INSPECT PURGE VSV (POWER SOURCE VOLTAGE)

CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

CHECK WHETHER DTC OUTPUT RECURS

CHECK HARNESS AND CONNECTOR (PURGE VSV - NO. 1 INTEGRATION RELAY)

DESCRIPTION

CONFIRMATION DRIVING PATTERN

1. Connect the intelligent tester to the DLC3.
   
2. Turn the ignition switch to ON and turn the tester on.
   
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
   
4. Turn the ignition switch off and wait for at least 30 seconds.
   
5. Turn the ignition switch to ON and turn the tester on.
   
6. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher [A].
   

   HINT:

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

7. Idle the engine for 15 minutes or more [B].
   

   HINT:

   Check the EVAP (Purge) VSV item in the Data List. When the value of this item is between 5 and 95%, the judgment will be performed.

8. Enter the following menus: Powertrain / Engine and ECT / DTC [C].
   
9. Read the pending DTCs.
   

   HINT:

   1. If a pending DTC is output, the system is malfunctioning.
      
   2. If a pending DTC is not output, perform the following procedure.
      
10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
    
11. Input the DTC: P0443.
    
12. Check the DTC judgment result.
    
    

    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
    N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    1. If the judgment result shows NORMAL, the system is normal.
       
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
       
    3. If the judgment result shows INCOMPLETE or N/A, perform steps [D] and [E].
       
13. Drive the vehicle at a constant speed between 40 and 60 km/h (25 and 37 mph) for 10 minutes [D].
    

    CAUTION:

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

14. Check the DTC judgment result [E].
    

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

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

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions 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.

1. Connect the intelligent tester to the DLC3.
   

2. Remove the vacuum hose of the purge VSV from the charcoal canister.
   

3. Start the engine and turn the tester on.
   

4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Evap Control.
   

5. When the purge VSV is operated using the tester, check whether the purge VSV applies suction to your finger.
   

   OK:

   Tester Operation	Specified Condition
   VSV is ON	Suction applied
   VSV is OFF	No suction applied

   Text in Illustration

   *a	VSV is ON
   *b	VSV is OFF
   *c	Air

1. Inspect the purge VSV (HILUX_TGN26 RM0000014H800GX.html).
   

1. Disconnect the purge VSV connector.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   C143-1 - Body ground	Ignition switch ON	11 to 14 V

   Text in Illustration

   *a	Front view of wire harness connector (to Purge VSV)

1. Disconnect the purge VSV connector.
   

2. Disconnect the ECM connector.
   

3. Measure the resistance between the terminals of the wire harness side connectors.
   
   

   Standard Resistance:

   
   

   Tester Connection	Condition	Specified Condition
   C143-2 - C129-34 (PRG)	Always	Below 1 Ω
   C143-2 or C129-34 (PRG) - Body ground	Always	10 kΩ or higher

1. Connect the intelligent tester to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the tester on.
   

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

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

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

7. Idle the engine for 15 minutes or more.
   

8. Turn the tester on.
   

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

10. Input the DTC: P0443.
    

11. Check the DTC judgment result.
    

    Result

    Result	Proceed to
    NORMAL (DTC is not output)	A
    ABNORMAL (DTC P0443 is output)	B

    HINT:

    If the judgment result shows INCOMPLETE or N/A, drive the vehicle at a constant speed between 40 and 60 km/h (25 and 37 mph) for 10 minutes and check the DTC judgment result again.

1. Disconnect the purge VSV connector.
   

2. Remove the No. 1 integration relay from the engine room relay block and junction block assembly.
   

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

   Standard Resistance:

   
   

   Tester Connection	Condition	Specified Condition
   C143-1 - 1J-5	Always	Below 1 Ω
   C143-1 or 1J-5 - Body ground	Always	10 kΩ or higher