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Home >> Lexus >> 2011 >> IS 250 RWD V6-2.5L (4GR-FSE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> EVAP System >> Part 2

Part 2





4GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System
- EVAP System (Continued)

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

(a) Disconnect the hose (connected to the throttle body) from the purge VSV.





(b) Start the engine.

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

Result:





(d) Reconnect the hose.

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

16. INSPECT DUTY VACUUM SWITCHING VALVE (PURGE VSV)

(a) Remove the purge VSV connector.





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

(c) Using and air gum, confirm that air flows from port A to port B.

Result:





(d) Install the purge VSV.

B -- REPLACE DUTY VACUUM SWITCHING VALVE (PURGE VSV)
A -- Continue to next step.

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

(a) Disconnect the E15 purge VSV connector.

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

(c) Measure the voltage between terminal 1 of purge VSV connector and body ground.

Result:





(d) Reconnect the purge VSV connector.

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

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

(a) Disconnect the E3 ECM connector and the E15 purge VSV connector.

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

Standard resistance:





(c) Reconnect the purge VSV connector.

(d) Reconnect the ECM connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM

19. INSPECT CANISTER ASSEMBLY (POWER SOURCE FOR VENT VALVE)

(a) Turn the engine switch off.





(b) Disconnect the Q49 canister pump module connector.

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

(d) Measure the voltage between terminal 9 of the canister connector and body ground.

Result:





(e) Reconnect the canister pump module connector.

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

20. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

(a) Turn the engine switch off.





(b) Disconnect the Q49 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:





(e) Reconnect the canister pump module connector.

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

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

(a) Disconnect the A6 ECM connector and the Q49 canister pump module connector.

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

Result:





(c) Reconnect the ECM connector.

(d) Reconnect the canister pump module connector.

B -- REPAIR OR REPLACE HARNESS OR CONNECTOR

A -- REPLACE ECM

22. PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VACUUM PUMP)

(a) Turn the engine switch off.





(b) Disconnect the Q49 canister pump module connector.

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

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

(e) Measure the voltage between terminal 1 of the canister connector and body ground.

Result:





(f) Reconnect the canister pump module connector.

C -- REPLACE ECM

B -- CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)
A -- Continue to next step.

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

(a) Turn the engine switch off.

(b) Disconnect the Q49 canister pump module connector.

(c) Measure the resistance between terminal 6 of the canister connector and body ground.

Result:





(d) Reconnect the canister pump module connector.

B -- REPAIR OR REPLACE HARNESS OR CONNECTOR

A -- REPLACE CANISTER

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

(a) Disconnect the A6 ECM connector and the Q49 canister pump module connector.

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

Result:





(c) Reconnect the ECM connector.

(d) Reconnect the canister pump module connector.

B -- REPAIR OR REPLACE HARNESS OR CONNECTOR

A -- REPLACE ECM

25. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

(a) Stop the engine.

(b) Disconnect the EVAP hose from the intake manifold.

(c) Start the engine.

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

Result:





(e) Reconnect the EVAP hose.

B -- INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

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

26. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP

HINT
* When reinstalling the fuel tank cap, tighten it until a few click sounds are heard.
* When replacing the fuel tank cap, use a fuel tank cap that meets OEM specifications, and install it until a few click sounds are heard.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

27. REPLACE FUEL TANK CAP

HINT
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 EVAP SYSTEM CHECK (AUTOMATIC MODE)

28. LOCATE EVAP LEAK PART

(a) Disconnect the vent hose.





(b) Connect the EVAP pressure tester tool to the canister pump module 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 the leak point.

(f) Repair or replace the leak point.

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

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

29. REPLACE CANISTER

(a) Replace the canister Removal.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

30. REPLACE DUTY VACUUM SWITCHING VALVE (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 hoses.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

31. REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

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

NEXT -- PERFORM EVAP 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 EVAP SYSTEM CHECK (AUTOMATIC MODE)

34. REPLACE ECM

(a) Replace the ECM Removal.

NEXT -- PERFORM EVAP 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 -- Continue to next step.

36. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

NOTICE:
* In the Evaporative System Check (Automatic Mode), the series of 5 Evaporative System Check step are performed automatically. It takes a maximum of approximately 18 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 unavailable.
* 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) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs DTC Check / Clear.

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

(f) 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:

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

(2) The fuel tank is less than 90% full

(3) The altitude is less than 8000 ft (2400 m)

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

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

(6) The vehicle remains stationary (the vehicle speed is 0 km/h [0 mph])

(b) Monitor Conditions

(1) Allow the engine to idle for at least 5 minutes.

(2) Turn the engine switch off and wait for 5 hours (8 or 10.5 hours).

HINT
Do not turn the engine switch on (IG) until checking Monitor Status. If the engine is started, the steps described above must be repeated.

(c) Monitor Status

(1) Connect Techstream to the DLC3.

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

(3) Enter the following menus: Powertrain / Engine / Monitor / Current Monitor / Evaporative System.

(4) 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:

(1) The vehicle has been driven for 10 minutes or more (in a city area or on a free way)

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

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

(b) Monitor Conditions

(1) Release the pressure from the fuel tank by removing and reinstalling the fuel tank cap.

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

(3) Increase the engine speed to 3000 rpm once.

(4) Allow the engine to idle and turn the A/C ON for 1 minute.

(c) Monitor Status

(1) Turn the engine switch off (where on (IG) or the engine is running).

(2) Connect Techstream to the DLC3.

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

(4) Enter the following menus: Powertrain / Engine / Monitor / Current Monitor / Evaporative System.

(5) 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.

MONITOR RESULT

Refer to Checking Monitor Status Mode 6 Data
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