DTC P0443 1GR-FE

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 - EFI NO. 2 FUSE)

CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

DTC P0443 Evaporative Emission Control System Purge Control Valve Circuit

Description DTC P0443

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).	Open or short in purge VSV circuit Purge VSV ECM

Wiring diagram

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)

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 intelligent 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

NG

2.INSPECT PURGE VSV

1. Inspect the purge VSV .

NG	REPLACE PURGE VSV

OK

3.INSPECT PURGE VSV (POWER SOURCE VOLTAGE)

1. Disconnect the purge VSV connector.

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

   Standard Voltage:

   Tester Connection	Switch Condition	Specified Condition
   C19-1 - Body ground	Ignition switch ON	11 to 14 V

OK	Go to step 5

NG

4.CHECK HARNESS AND CONNECTOR (PURGE VSV - EFI NO. 2 FUSE)

1. Remove the EFI NO. 2 fuse from the engine room relay block.

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

   Standard Resistance (Check for Open):

   Tester Connection	Condition	Specified Condition
   C19-1 - EFI NO. 2 fuse (2)	Always	Below 1 ?

   Standard Resistance (Check for Short):

   Tester Connection	Condition	Specified Condition
   C19-1 or EFI NO. 2 fuse (2) - Body ground	Always	10 k? or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPAIR OR REPLACE POWER SOURCE CIRCUIT COMPONENTS

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

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 (Check for Open):

   for LHD

   Tester Connection	Condition	Specified Condition
   C19-2 - PRG (C45-108)	Always	Below 1 ?

   for RHD

   Tester Connection	Condition	Specified Condition
   C19-2 - PRG (C46-108)	Always	Below 1 ?

   Standard Resistance (Check for Short):

   for LHD

   Tester Connection	Condition	Specified Condition
   C19-2 or PRG (C45-108) - Body ground	Always	10 k? or higher

   for RHD

   Tester Connection	Condition	Specified Condition
   C19-2 or PRG (C46-108) - Body ground	Always	10 k? or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE ECM