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Home >> Toyota >> 2012 >> Tundra 4WD V8-5.7L (3UR-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> EVAP System >> Part 2

Part 2





3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System
- EVAP System - (Continued)

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





(a) Disconnect the 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.

24. INSPECT PURGE VSV





(a) Remove the purge VSV Removal.

(b) Apply the 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.

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





(a) Disconnect the D29 purge VSV connector.

(b) Turn the ignition switch to ON.

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

Result





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

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





(a) Disconnect the D74 ECM connector and the D29 purge VSV connectors.

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

Standard resistance:





OK -- REPLACE ECM

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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





(a) Turn the ignition switch off.

(b) Disconnect the R1 canister pump module connector.

(c) Turn the ignition switch to ON.

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

Result





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

28. INSPECT PUMP MODULE (VENT VALVE OPERATION)





(a) Turn the ignition switch off.

(b) Disconnect the R1 canister pump module connector.

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

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

Result





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

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





(a) Disconnect the A24 ECM connector.

(b) Disconnect the R1 canister pump module connector.

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

Result





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

30. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

(a) Check for filter blockage in the canister Testing and Inspection.

OK:

No blockages in the canister.

OK -- REPLACE ECM

NG -- REPLACE CANISTER POMP MODULE

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





(a) Turn the ignition switch off.

(b) Disconnect the R1 canister pump module connector.

(c) Turn the ignition switch to ON.

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

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

Result





B -- CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)

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

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





(a) Turn the ignition switch off.

(b) Disconnect the R1 canister pump module connector.

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

Result





A -- REPLACE CANISTER POMP MODULE

B -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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





(a) Turn the ignition switch off.

(b) Disconnect the R1 canister pump module connector.

(c) Disconnect the A24 ECM connector.

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

Result





A -- REPLACE ECM

B -- REPAIR OR REPLACE HARNESS OR CONNECTOR

34. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

(a) Stop the engine.

(b) Disconnect the purge line 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 purge line.

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

B -- INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

35. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY

HINT
* When reinstalling the fuel cap, tighten it firmly (only one click sound could be head).
* When replacing the fuel cap, use a fuel cap that meets OEM specifications, and install it firmly.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

36. 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)

37. LOCATE EVAP LEAK PART





(a) Disconnect the vent hose.

(b) Connect an EVAP tester 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 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 EVAP SYSTEM CHECK (AUTOMATIC MODE)

38. REPLACE CANISTER POMP MODULE

(a) Replace the canister pump module Removal.

NOTICE:
* When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and 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. If liquids are present in canister interior, replace canister and canister pump module together (replace canister assembly).
* Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly).
* Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.





NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

39. REPLACE PURGE VSV

(a) Replace the purge VSV Removal.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

40. REPAIR OR REPLACE HARNESS OR CONNECTOR

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

41. REPLACE PURGE LINE (INTAKE MANIFOLD - PURGE VSV)

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

42. 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)

43. 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 EVAP SYSTEM CHECK (AUTOMATIC MODE)

44. REPAIR OR REPLACE EVAP HOSE

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

45. REPLACE CANISTER POMP MODULE

(a) Replace the canister pump module Removal.

NOTICE:
* When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and 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. If liquids are present in canister interior, replace canister and canister pump module together (replace canister assembly).
* Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly).
* Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.





NEXT -- Continue to next step.

46. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

NOTICE:
* The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. 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. If the cut-off valve is closed, the fuel tank leak check is not possible.
* Do not run the engine during this operation.
* 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 the Evaporative System Check, keep the temperature below 35°C (95°F).

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Enter the following menus: Powertrain / Engine and ECT / 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 and ECT / Trouble Codes





B -- END
A -- Continue to next step.

47. REPLACE ECM

(a) Replace the ECM Removal.

NEXT -- Continue to next step.

48. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

NOTICE:
* The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. 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. If the cut-off valve is closed, the fuel tank leak check is not possible.
* Do not run the engine during this operation.
* 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 the Evaporative System Check, keep the temperature below 35°C (95°F).

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Enter the following menus: Powertrain / Engine and ECT / 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 and ECT / Trouble Codes

HINT
If no pending DTCs are found, the repair has been successfully completed.

NEXT -- END
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