Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

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

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 - ECM)

CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY [MAIN RELAY])

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 so that the intake amount of evaporated fuel 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

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fbe 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 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-Fbe Engine Control.Sfi System. Dtc P0443 Evaporative Emission Control System Purge Control Valve Circuit

  1. Connect the intelligent tester to the DLC3.

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

  1. Start the engine.

  1. 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 intelligent 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

  1. Reconnect the vacuum hose of the charcoal canister to the purge VSV.



NG
Go to step 2
OK

CHECK FOR INTERMITTENT PROBLEMS (HILUX_TGN26 RM000000PDQ0YMX.html)

2.INSPECT PURGE VSV

  1. Inspect the purge VSV (HILUX_TGN26 RM000001426010X.html).



NG
REPLACE PURGE VSV (HILUX_TGN26 RM000001428010X.html)
OK


3.INSPECT PURGE VSV (POWER SOURCE VOLTAGE)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fbe 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
    		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)

  1. Reconnect the purge VSV connector.



NG
Go to step 5
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 (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C69-1 - C97-19 (PRG)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    C69-1 or C97-19 (PRG) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the purge VSV connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - ECM)
OK

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)

5.CHECK HARNESS AND CONNECTOR (PURGE VSV - INTEGRATION RELAY [MAIN RELAY])

  1. Disconnect the purge VSV connector.

  1. Remove the integration relay (MAIN relay) from the engine room relay block and disconnect the integration relay connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    C69-2 - 1J-5
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    C69-2 or 1J-5 - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the integration relay connector.

  1. Reinstall the integration relay.

  1. Reconnect the purge VSV connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (PURGE VSV - INTEGRATION RELAY [MAIN RELAY])
OK

CHECK ECM POWER SOURCE CIRCUIT (HILUX_TGN26 RM000002769099X.html)