Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

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)

CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

PERFORM CONFIRMATION DRIVING PATTERN

DTC P0443 Evaporative Emission Control System Purge Control Valve Circuit


DESCRIPTION

To reduce hydrocarbon emissions, evaporated fuel from the fuel tank is routed through a charcoal canister to the intake manifold for combustion in the cylinders.
The ECM changes the duty signals to the purge VSV (Vacuum Switching Valve for Purge Control) so that the intake amount of hydrocarbon emissions is appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.

DTC No.
DTC Detection Condition
Trouble Area
P0443
The terminal voltage of the ECM output circuit does not correspond with the drive signals from the ECM to the purge VSV (1 trip detection logic).
  1. Open or short in purge VSV circuit
  2. Purge VSV
  3. ECM

CONFIRMATION DRIVING PATTERN


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

  1. Connect the intelligent tester to the DLC3.
  2. Turn the ignition switch to ON and turn the intelligent 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 intelligent 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 and all accessory switches should be off.
  7. Idle the engine for 15 minutes or more [B].
  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
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. 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 38 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


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses of 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 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.
1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ACTIVATE THE VSV FOR EVAP CONTROL)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

  1. Connect the intelligent tester to the DLC3.

  1. Disconnect the vacuum hose (charcoal canister side) from the purge VSV.

  1. Start the engine.

  1. Turn the intelligent tester on.

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

  1. Place your finger on port E. Check if the disconnected port applies suction to your finger when operating the purge VSV using the intelligent tester.

    OK:
    Tester Operation
    		Specified Condition
    VSV ON
    		Purge VSV port applies suction to finger
    VSV OFF
    		Purge VSV port applies no suction to finger


NG
Go to step 2
OK

CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0Z2X.html)

2.INSPECT PURGE VSV

  1. Inspect the purge VSV (HILUX_TGN26 RM00000142600ZX_01_0001.html).



NG
REPLACE PURGE VSV (HILUX_TGN26 RM00000142800ZX.html)
OK


3.INSPECT PURGE VSV (POWER SOURCE)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

  1. Disconnect the purge VSV connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C69-2 - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Purge VSV)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

  1. Disconnect the purge VSV connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C69-1 - C76-23 (PRG)
    		Always
    		Below 1 Ω
    C69-1 or C76-23 (PRG) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.PERFORM CONFIRMATION DRIVING PATTERN

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

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

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

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

  1. Idle the engine for 15 minutes or more.

  1. Turn the tester on.

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

  1. Input the DTC: P0443.

  1. 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 38 mph) for 10 minutes and check the DTC judgment result again.


B
REPLACE ECM (HILUX_TGN26 RM000000VW202TX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0Z2X.html)