Part 2

3UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System
- EVAP System


Continued


C -- CHECK PURGE LINE HOSE (PURGE VSV - INTAKE MANIFOLD)

B -- INSPECT PURGE VSV
A -- Continue to next step.

13. CHECK FUEL CAP

(a) Check that the fuel cap is correctly installed and confirm the fuel cap meets OEM specification.

(1) Tighten the fuel cap until a few click sounds are heard.

HINT
If an EVAP Techstream is available, use the Techstream to check the fuel cap.

(b) Remove the fuel cap and install it onto the fuel tank cap adapter.

(c) Connect an EVAP Techstream pump hose to the adapter, and pressurize the cap to 3.2 to 3.7 kPa (24 to 28 mmHg) using an EVAP Techstream pump.

(d) Seal the adapter and wait for 2 minutes.

(e) Check the pressure. If the pressure is 2 kPa (15 mmHg) or more, the fuel cap is normal.

Result:





C -- REPLACE FUEL CAP

B -- CORRECTLY REINSTALL OR REPLACE FUEL CAP

A -- LOCATE EVAP LEAK

14. INSPECT PURGE VSV





(a) Turn the ignition switch OFF.

(b) Disconnect the V4 purge VSV connector.

(c) Disconnect the purge line hose (connected to the canister) from the purge VSV.

(d) Start the engine.

(e) Use your finger to confirm that the purge VSV has no suction.

Result:





B -- REPLACE PURGE VSV

A -- REPLACE ECM

15. CHECK PURGE LINE HOSE (PURGE VSV - INTAKE MANIFOLD)





(a) Disconnect the purge line hose (connected to the intake manifold) from the purge VSV.

(b) Start the engine.

(c) Use your finger to confirm that the hose has suction.

Result:





B -- INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)
A -- Continue to next step.

16. INSPECT PURGE VSV





(a) Disconnect the V4 purge VSV connector.

(b) Apply battery voltage to the terminals of the purge VSV.

(c) Using an air gun, confirm that air flows from port A to port B.

Result:





B -- REPLACE PURGE VSV
A -- Continue to next step.

17. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF PURGE VSV)





(a) Disconnect the V4 purge VSV connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage of the wire harness side connector.

Result:





B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

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





(a) Disconnect the V4 purge VSV connector.

(b) Disconnect the E2 ECM connector.

(c) Measure the resistance of the wire harness side connectors.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM

19. PERFORM ACTIVE TEST USING TECHSTREAM (FOR VENT VALVE)





(a) Turn the ignition switch to ON.

(b) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Vent Valve.

(c) Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (closed) and OFF (vent) using the Techstream.

Result:





C -- REPLACE ECM

B -- INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)
A -- Continue to next step.

20. INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE)





(a) Turn the ignition switch OFF.

(b) Disconnect the C12 canister pump module connector.

(c) Turn the ignition switch to ON.

(d) Measure the voltage of the wire harness side connector.

Result:





B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

21. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)





(a) Turn the ignition switch OFF.

(b) Disconnect the C12 canister pump module connector.

(c) Apply the battery voltage to terminals 9 and 8 of the canister pump module.

(d) Touch the canister pump module to confirm the vent valve operation.

Result:





B -- REPLACE CANISTER ASSEMBLY

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR

22. PERFORM ACTIVE TEST USING TECHSTREAM (FOR CANISTER PUMP MODULE [LEAK DETECTION PUMP])





(a) Enter the following menus: Powertrain / Engine / Active Test / Activate the Vacuum Pump.

(b) Measure the voltage between MPMP terminal of the ECM connector and the body ground when the leak detection pump is turned ON and OFF using the Techstream.

Result:





B -- REPLACE ECM
A -- Continue to next step.

23. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)





(a) Turn the ignition switch OFF.

(b) Disconnect the C12 canister pump module connector.

(c) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Engine / Active Test / Activate the Vacuum Pump.

(e) Turn the leak detection pump ON.

(f) Measure the voltage of the wire harness side connector.

Result:





B -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

24. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - GROUND)





(a) Disconnect the C12 canister pump module canister connector.

(b) Turn the ignition switch OFF.

(c) Measure the resistance of the wire harness side connectors between terminal 6 of the C12 connector and the body ground.

Result:





B -- REPAIR OR REPLACE HARNESS OR CONNECTOR

A -- REPLACE CANISTER ASSEMBLY

25. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

(a) Turn the ignition switch OFF.

(b) Disconnect the purge line hose from the intake manifold.

(c) Turn the ignition switch to ON.

(d) Use your finger to confirm that the port of the intake manifold has suction.

Result:





B -- INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

A -- REPLACE PURGE LINE HOSE (INTAKE MANIFOLD - PURGE VSV)

26. CORRECTLY REINSTALL OR REPLACE FUEL CAP

HINT
* When reinstalling the fuel cap, tighten it until a few click sounds are heard.
* When replacing the fuel cap, use a fuel cap that meets OEM specifications, and tighten it until a few click sounds are heard.
NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

27. REPLACE FUEL CAP

HINT
When installing the fuel tank cap, tighten it until a few click sounds are heard.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

28. LOCATE EVAP LEAK

(a) Disconnect the vent hose.





(b) Install the EVAP pressure Techstream tool to the vent hose with the adapter.





(c) Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg).

(d) Apply soapy water to the piping and connecting parts of the EVAP system.

(e) Look for areas where bubbles appear. This indicates a leak point.

(f) Repair or replace the leak point.

HINT
Disconnect the hose between the canister and the fuel tank from the canister. Block the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

29. REPLACE CANISTER ASSEMBLY

(a) Replace the canister assembly Service and Repair.

NOTICE:
When replacing the canister, check the canister pump module interior and related pipes for water, fuel or other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose.





NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

30. REPLACE PURGE VSV

(a) Disconnect the connector and hoses from the purge VSV.

(b) Remove the purge VSV.

(c) Install a new purge VSV.





(d) Reconnect the connector and hose.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

31. REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

32. REPLACE PURGE LINE HOSE (INTAKE MANIFOLD - PURGE VSV)

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

33. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

(a) Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

34. REPLACE ECM

Service and Repair

(a) Replace the ECM.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

35. REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS

(a) Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in.

NEXT -- PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

36. PERFORM EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

NOTICE:
* In the Evaporative System Check (Automatic Mode), the series of 5 Evaporative System Check steps are performed automatically. It takes a maximum of approximately 19 minutes.
* Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the leak check of the fuel tank not possible.
* Do not run the engine in this step.
* When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the temperature below 35°C (95°F).
(a) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

(c) After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes / Pending.

HINT
If no pending DTC is found, the repair has been successfully completed.

NEXT -- COMPLETED

CONFIRMATION DRIVING PATTERN

HINT
After a repair, check Monitor Status by performing the key-off monitor confirmation and purge flow monitor confirmation described below.

1. Key-off monitor confirmation

(a) Preconditions

The monitor will not run unless:

* The vehicle has been driven for 10 minutes or more (in a city area or on a freeway)

* The fuel tank is less than 90% full

* The altitude is less than 8000 ft. (2400 m)

* The Engine Coolant Temperature (ECT) is between 4.4 to 35°C (40 to 95°F)

* The Intake Air Temperature (IAT) is between 4.4 to 35°C (40 to 95°F)

* The vehicle remains stationary (the vehicle speed is 0 km/h (0 mph))

(b) Monitor Conditions

* Allow the engine to idle for at least 5 minutes.

* Turn the ignition switch OFF and wait for 5 to 10 hours.

HINT
Do not start the engine until checking Monitor Status. If the engine is started, the steps described above must be repeated.

(c) Monitor Status

* Connect the Techstream to the DLC3.

* Turn the ignition switch to ON.

* Enter the following menus: Powertrain / Engine / Monitor / Evaporative System.

* Check the Monitor Status displayed on the Techstream.

HINT
If Incomplete is displayed, the monitor is not completed. Make sure that the preconditions have been met, and perform the Monitor Conditions again.

2. Purge flow monitor confirmation (P0441)

HINT
Perform this monitor confirmation after the key-off monitor confirmation shows Complete.

(a) Preconditions

The monitor will not run unless:

* The vehicle has been driven for 10 minutes or more (in a city area or on a freeway)

* The ECT is between 4.4 to 35°C (40 to 95°F)

* The IAT is between 4.4 to 35°C (40 to 95°F)

(b) Monitor Conditions

* Release the pressure from the fuel tank by removing and reinstalling the fuel cap.

* Warm the engine up until the ECT reaches more than 75°C (167°F).

* Increase the engine speed to 3000 rpm once.

* Allow the engine to idle and turn the A/C ON for 1 minute.

(c) Monitor Status

* Turn the ignition switch OFF (when ON or the engine is running).

* Connect the Techstream to the DLC3.

* Turn the ignition switch to ON.

* Enter the following menus: Powertrain / Engine / Utility.

* Check the Monitor Status displayed on the Techstream.

HINT
If INCMP is displayed, the monitor is not completed. Make sure that the preconditions have been met, and perform the "Monitor Conditions" procedures again.

MONITOR RESULT

Refer to CHECKING MONITOR STATUS Mode 6 Data.