P0443

2GR-FE ENGINE CONTROL: SFI SYSTEM: P0443: Evaporative Emission Control System Purge Control Valve Circuit
P0443 - Evaporative Emission Control System Purge Control Valve Circuit

DESCRIPTION

HINT
This DTC P0443 is applicable to Mexico models only.

To reduce hydrocarbon (HC) emissions, evaporated fuel from the fuel tank is routed through a canister to the intake air surge tank assembly for combustion in the cylinders.

The ECM changes the duty signals to the purge VSV so that the intake amount of hydrocarbon (HC) emissions is appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.





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 Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VSV FOR EVAP CONTROL)

(a) Disconnect the fuel vapor feed hose assembly (on the canister side) of the purge VSV.





Text in Illustration





(b) Connect the Techstream to the DLC3.

(c) Start the engine.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Evap Control.

(f) When the purge VSV is operated using the Techstream, check whether the port of the purge VSV applies suction to your finger.

OK:





NG -- INSPECT PURGE VSV (RESISTANCE)

OK -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems

2. INSPECT PURGE VSV (RESISTANCE)

(a) Inspect the purge VSV Testing and Inspection.

NG -- REPLACE PURGE VSV Removal
OK -- Continue to next step.

3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV)

(a) Disconnect the purge VSV connector.





(b) Turn the engine switch on (IG).

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

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (PURGE VSV - NO. 1 INTEGRATION RELAY)
OK -- Continue to next step.

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

(a) Disconnect the purge VSV connector.

(b) Disconnect the ECM connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal

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

(a) Disconnect the purge VSV connector.

(b) Remove the No. 1 integration relay from the engine room relay block and junction block assembly.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE NO. 1 INTEGRATION RELAY