Part 2

1NR-FE ENGINE CONTROL: SFI SYSTEM: EVAP System
- EVAP System

6. PERFORM EVAP SYSTEM CHECK (STEP 2/6)

HINT
Make a note of the pressures checked in inspection items (A) and (B) below.

(a) Check the EVAP pressure 4 seconds after the leak detection pump is activated*1 (A).

*1: The leak detection pump begins to operate as step 1/6 finishes and step 2/6 starts.

(b) Check the EVAP pressure again when it has stabilized. This pressure is the reference pressure (B).

Result

*2: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

B -- PERFORM EVAP SYSTEM CHECK (STEP 3/6)

C -- REPLACE CANISTER

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

7. PERFORM EVAP SYSTEM CHECK (STEP 2/6 TO 3/6)

(a) Check the EVAP pressure in step 3/6.

Result

*: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

B -- INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE)

C -- CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND)
A -- Continue to next step.

8. PERFORM EVAP SYSTEM CHECK (STEP 3/6)

(a) Wait until the EVAP pressure change is less than 0.12 kPa(gauge) [0.9 mmHg(gauge)] for 30 seconds.

(b) Measure the EVAP pressure and record it.

HINT
A few minutes are required for the EVAP pressure to become saturated. When there is little fuel in the fuel tank, it takes up to 15 minutes.

NEXT -- Continue to next step.

9. PERFORM EVAP SYSTEM CHECK (STEP 4/6)

(a) Check the EVAP pressure in step 4/6.

Result

* *1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

* *2: This result suggests that due to purge line blockage or purge VSV malfunction, the DTC was stored by the purge flow monitor while the engine was running, or that key-off monitor test result were nearly borderline values.

B -- INSPECT EVAP HOSE (PURGE VSV - CANISTER)

C -- PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV)
A -- Continue to next step.

10. PERFORM EVAP SYSTEM CHECK (STEP 5/6)

(a) Check the EVAP pressure in step 5/6.

(b) Compare the EVAP pressure in step 3/6 and the second reference pressure (step 5/6).

Result

*: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

A -- REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS

B -- PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV)

11. PERFORM EVAP SYSTEM CHECK (STEP 3/6)

(a) Check the EVAP pressure in step 3/6.

Result

*: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

HINT
The first reference pressure is the value determined in step 2/6.

A -- REPLACE CANISTER

B -- PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VACUUM PUMP)

12. INSPECT CANISTER PUMP MODULE (CANISTER PRESSURE SENSOR CIRCUIT)

(a) Check the canister pressure sensor circuit, referring to DTC P0451 canister pressure sensor circuit inspection procedure P0451.

NEXT -- PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

13. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

Text in Illustration

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

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

Result

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

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

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

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

Standard Resistance:

Result

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

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

(a) Disconnect the canister pump module connector.

(b) 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.

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

(a) Disconnect the canister pump module connector.

(b) Disconnect the ECM connector.

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

Result

A -- REPLACE CANISTER

B -- REPAIR OR REPLACE HARNESS OR CONNECTOR

17. PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV)

(a) Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for EVAP Control.

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

Text in Illustration

(c) Start the engine.

(d) Using the Techstream, turn off the purge VSV (Activate the VSV for Evap Control: OFF).

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

(f) Using the Techstream, turn on the purge VSV (Activate the VSV for Evap Control: ON).

(g) Use your finger to confirm that the purge VSV has suction.

Result

B -- CHECK FUEL CAP ASSEMBLY

C -- INSPECT PURGE VSV

D -- CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD)
A -- Continue to next step.

18. INSPECT EVAP HOSE (PURGE VSV - CANISTER)

(a) Check for blockages in the EVAP purge line between the purge VSV and canister.

OK:

No blockages in the EVAP purge line between the purge VSV and canister.

NG -- REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER)
OK -- Continue to next step.

19. 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

20. CHECK FUEL CAP ASSEMBLY

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

(b) Tighten the fuel cap firmly (only one click sound could be heard).

HINT
If an EVAP tester is available, check the fuel cap using the Techstream.

(1) Remove the fuel cap and install it onto a fuel cap adapter.

(2) Connect an EVAP tester pump hose to the adapter, and pressurize the cap to 3.2 to 3.7 kPa(gauge) [24 to 28 mmHg(gauge)] using an EVAP tester pump.

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

(4) Check the pressure. If the pressure is 2 kPa(gauge) [15 mmHg(gauge)] or more, the fuel cap is normal.

Result

A -- LOCATE EVAP LEAK PART

B -- CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY

C -- REPLACE FUEL TANK CAP ASSEMBLY

21. INSPECT PURGE VSV

(a) Turn the ignition switch off.

(b) Disconnect the purge VSV connector.

Text in Illustration

(c) Disconnect the 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

A -- CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

B -- REPLACE PURGE VSV

22. INSPECT EVAP HOSE (PURGE VSV - CANISTER)

(a) Check for blockages in the EVAP purge line between the purge VSV and canister.

OK:

No blockages in the EVAP purge line between the purge VSV and canister.

NG -- REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER)
OK -- Continue to next step.

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

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

Text in Illustration

(b) Start the engine.

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

Result

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

24. INSPECT PURGE VSV

(a) Remove the purge VSV.

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

Text in Illustration

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

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

(a) Disconnect the purge VSV connector.

(b) Turn the ignition switch to ON.

Text in Illustration

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

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

(a) Disconnect the ECM connector.

(b) Disconnect the purge VSV connector.

(c) 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.

Text in Illustration

(b) Disconnect the 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 CANISTER PUMP MODULE (VENT VALVE OPERATION)

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

Text in Illustration

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

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

Result

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