Part 2

2ZR-FXE ENGINE CONTROL: SFI SYSTEM: EVAP System
- EVAP System (Continued)

3. PERFORM EVAPORATIVE SYSTEM CHECK (MANUAL MODE)





NOTICE:
* In the Evaporative System Check (Manual Mode), the series of 6 Evaporative System Check steps are performed manually using the Techstream.
* Do not perform the Evaporative System Check when the fuel tank is higher than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
* Do not run the engine during this operation.
* When the temperature of the fuel is 35°C (95°F) or higher, 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 power switch on (IG).

(c) Turn the Techstream on.

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

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

NEXT -- Continue to next step.

4. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 1/6)





(a) Check the EVAP pressure in step 1/6.

Result





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

* *2: If the canister pressure sensor circuit has an open or short, DTC P0452 or P0453 is stored 0.5 seconds after the power switch is turned on (IG).

HINT
*3: Canister pressure sensor standard output range is 70 to 111 kPa(abs) [525 to 833 mmHg(abs)]. This varies by weather.

B -- REPLACE CANISTER

C -- INSPECT CANISTER PUMP MODULE (CANISTER PRESSURE SENSOR CIRCUIT)
A -- Continue to next step.

5. PERFORM EVAPORATIVE SYSTEM CHECK (STEP 1/6 TO 2/6)





(a) Check the EVAP pressure in steps 1/6 and 2/6.

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.

B -- PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VACUUM PUMP)
A -- Continue to next step.

6. PERFORM EVAPORATIVE 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 EVAPORATIVE SYSTEM CHECK (STEP 3/6)

C -- REPLACE CANISTER

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

7. PERFORM EVAPORATIVE 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 EVAPORATIVE SYSTEM CHECK (STEP 3/6)





(a) Wait until the EVAP pressure change is less than 0.12 kPa [0.9 mmHg] 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 EVAPORATIVE 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 EVAPORATIVE 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 EVAPORATIVE 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 EVAPORATIVE SYSTEM CHECK (AUTOMATIC MODE)

13. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

(a) Turn the power switch off.

(b) Disconnect the canister pump module connector.





Text in Illustration





(c) Apply the auxiliary 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 power switch off.

(b) Disconnect the ECM connector.

(c) Disconnect the canister pump module connector.

(d) 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

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