Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
3Ur-Fe Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

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 - INTEGRATION RELAY)

CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

DTC P0443 Evaporative Emission Control System Purge Control Valve Circuit


DESCRIPTION

To reduce HC 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 so that the intake amount of HC emissions is appropriate for driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.

DTC Code
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

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.3Ur-Fe Engine Control.Sfi System. Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit


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


    Land Cruiser. Urj200, 202 Grj200 Vdj200.3Ur-Fe Engine Control.Sfi System. Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

  1. Connect the intelligent tester to the DLC3.

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

  1. Start the engine and turn the tester on.

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

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

    OK:
    Tester Operation
    		Specified Condition
    VSV is ON
    		Disconnected hose applies suction to finger
    VSV is OFF
    		Disconnected hose applies no suction to finger


OK
CHECK FOR INTERMITTENT PROBLEMS (Click here)
NG


2.INSPECT PURGE VSV

  1. Inspect the purge VSV (Click here).



NG
REPLACE PURGE VSV (Click here)
OK


3.INSPECT PURGE VSV (POWER SOURCE VOLTAGE)
Land Cruiser. Urj200, 202 Grj200 Vdj200.3Ur-Fe Engine Control.Sfi System. Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

  1. Disconnect the purge VSV connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    C55-1 - Body ground
    		Engine switch on (IG)
    		11 to 14 V


OK
Go to step 5
NG


4.CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY)
Land Cruiser. Urj200, 202 Grj200 Vdj200.3Ur-Fe Engine Control.Sfi System. Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

  1. Disconnect the purge VSV connector.

  1. Remove the integration relay from the engine room relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C55-1 - 1B-4
    		Always
    		Below 1 Ω
    C55-1 or 1B-4 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPAIR OR REPLACE POWER SOURCE CIRCUIT

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

  1. Disconnect the purge VSV connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C55-2 - C45-63 (PRG)
    		Always
    		Below 1 Ω
    C55-2 or C45-63 (PRG) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Click here)