SFI SYSTEM EVAP System

RELATED DTCS

If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below.

DESCRIPTION

While the engine is running, if a predetermined condition (closed-loop, etc.) is met, the purge VSV is opened by the ECM and fuel vapors stored in the canister are purged to the intake air surge tank assembly. The ECM changes the duty cycle ratio of the purge VSV to control purge flow volume.

The purge flow volume is also determined by the intake pressure. Atmospheric pressure is allowed into the canister through the vent valve to ensure that the purge flow is maintained when negative pressure (vacuum) is applied to the canister.

The following two monitors run to confirm appropriate EVAP system operation.

1. Key-off monitor

   This monitor checks for EVAP (evaporative emission) system leaks and canister pump module malfunctions. The monitor starts 5 hours* after the engine switch is turned off. At least 5 hours are required for the fuel to cool down to stabilize the EVAP pressure, thus making the EVAP system monitor more accurate.

   The leak detection pump creates negative pressure (vacuum) in the EVAP system and the pressure is measured. Finally, the ECM monitors for leaks from the EVAP system, and malfunctions in both the canister pump module and purge VSV based on the EVAP pressure.

   Tech Tips

   *: If the engine coolant temperature is not less than 35°C (95°F) 5 hours after the engine switch is turned off, the monitor check starts 2 hours later. If it is still not less than 35°C (95°F) 7 hours after the engine switch is turned off, the monitor check starts 2.5 hours later.

2. Purge flow monitor

   The purge flow monitor consists of the 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary.

   • The 1st monitor

     While the engine is running and the purge VSV (Vacuum Switching Valve) is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor.

   • The 2nd monitor

     The vent valve is turned on (closed) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.15 kPa(gauge) [1.125 mmHg(gauge)], the ECM interprets this as the purge VSV being stuck closed, illuminates the MIL and stores DTC P0441 (2 trip detection logic).

   • Atmospheric pressure check:

   • In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after of the purge flow monitor, is measured by the ECM.

   

   Text in Illustration

   *1	Canister	*2	to Intake Air Surge Tank Assembly
   *3	ECM	*4	Soak Timer
   *5	Purge VSV (On)	*6	Fuel Cap
   *7	Canister Filter	*8	Fuel Tank
   *9	Leak Detection Pump (Off)	*10	Canister Pressure Sensor
   *11	Reference Orifice (0.02 inches)	*12	Vent Valve (Off)
   *13	Canister Pump Module	-	-
   *a	EVAP Purge Flow	-	-

   Component	Operation
   Canister	Contains activated charcoal to absorb EVAP (Evaporative Emissions) generated in fuel tank.
   Cut-off valve	Located in fuel tank. Valve floats and closes when fuel tank is 100% full.
   Purge VSV (Vacuum Switching Valve)	Opens or closes line between canister and intake air surge tank assembly. ECM uses purge VSV to control EVAP purge flow. In order to discharge EVAP absorbed by canister to intake air surge tank assembly, ECM opens purge VSV. EVAP discharge volume to intake air surge tank assembly controlled by purge VSV duty cycle (current-carrying time). (Open: on, Close: off)
   Roll-over valve	Located in fuel tank. Valve closes by its own weight when vehicle overturns to prevent fuel from spilling out.
   Soak timer	Built into ECM. To ensure accurate EVAP monitor, measures 5 hours (+/-15 min) after engine switch is turned off. This allows fuel to cool down, stabilizing EVAP pressure. When approximately 5 hours elapsed, ECM activates (refer to fig. 3).
   Canister pump module	Consists of (a) to (d) below. Canister pump module cannot be disassembled.
   (a) Vent valve	Vents and closes EVAP system. When ECM turns valve on, EVAP system is closed. When ECM turns valve off, EVAP system is vented. Negative pressure (vacuum) is created in EVAP system to check for EVAP leaks by closing purge VSV, turning on vent valve (closing it) and operating leak detection pump (refer to fig. 1).
   (b) Canister pressure sensor	Indicates pressure as voltages. ECM supplies regulated 5 V to pressure sensor, and uses feedback from sensor to monitor EVAP system pressure (refer to fig. 2).
   (c) Leak detection pump	Creates negative pressure (vacuum) in EVAP system for leak check.
   (d) Reference orifice	Has opening with 0.02 inch diameter. Vacuum is produced through orifice by closing purge VSV, turning off vent valve and operating leak detection pump, to monitor reference pressure. Reference pressure is used when checking for small EVAP leaks.

   

   Text in Illustration

   *1	Canister	*2	Reference Orifice (0.02 Inch)
   *3	Canister Pressure Sensor	-	-
   *a	Canister Pump Module (fig. 1)	*b	Airflow
   *c	Condition: Purge Flow	*d	Condition: Leak Check
   *e	Vent Valve: off (vent)	*f	to Canister Filter (Atmosphere)
   *g	Leak Detection Pump: off	*h	Vent Valve: on (closed)
   *i	Leak Detection Pump: on	-	-

   
   

WIRING DIAGRAM

Refer to DTC P0451 Click here.

INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM DTC

   1. Turn the engine switch off and wait for 10 seconds.

   2. Turn the engine switch on (IG).

   3. Turn the engine switch off and wait for 10 seconds.

   4. Connect the Techstream to the DLC3.

   5. Turn the engine switch on (IG).

   6. Turn the Techstream on.

   7. Enter the following menus: Powertrain / Engine / Trouble Codes.

   8. Confirm the DTCs and freeze frame data.

      If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below.

      

      Note

      If the reference pressure difference between the first and second checks is greater than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored.

   NEXT

2. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

   Note

   • The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 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 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 less than 35°C (95°F).

   1. Connect the Techstream to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the Techstream on.

   4. Clear the DTCs Click here.

   5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

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

      Tech Tips

      If no pending DTCs are displayed, perform the Confirmation Driving Pattern. After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal.

   NEXT

3. PERFORM EVAP SYSTEM CHECK (MANUAL MODE)

   

   Note

   • 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 more 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 less than 35°C (95°F).

   1. Connect the Techstream to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the Techstream on.

   4. Clear the DTCs Click here.

   5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Manual Mode.

   NEXT

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

   

   1. Check the EVAP pressure in step 1/6.

      Result

      DTC *1	Result	Suspected Trouble Area	Proceed to
      -	Virtually no variation in EVAP pressure	Not yet determined	A
      P0451	EVAP pressure fluctuates by +/-0.3 kPa(gauge) [2.25 mmHg(gauge)] or higher	Canister pressure sensor signal noise	B
      (P0452 or P0453) *2	EVAP pressure is below 42.11009 kPa(abs) [315.86779 mmHg(abs)] or 123.76147 kPa(abs) [928.33479 mmHg(abs)] or higher EVAP pressure deviates +/-10 kPa(gauge) [75 mmHg(gauge)] from actual atmosphere pressure *3	Canister pressure sensor or its circuit has malfunction	C

      • *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 engine switch is turned on (IG).

      Tech Tips

      *3: Canister pressure sensor standard output range is 70 to 110 kPa(abs) [525 to 825 mmHg(abs)]. This varies by weather.

   B

   REPLACE CANISTER PUMP MODULE Click here

   C

   INSPECT CANISTER PUMP MODULE (CANISTER PRESSURE SENSOR CIRCUIT) Click here

   A

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

   

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

      Result

      DTC*	Result	Suspected Trouble Area	Proceed to
      -	Virtually no variation in EVAP pressure during step 1/6. Then decreases to reference pressure	Not yet determined	A
      P2402	Small difference between EVAP pressures during steps 1/6 and 2/6	Leak detection pump stuck ON	B

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

      Tech Tips

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

   B

   CHECK TERMINAL VOLTAGE (CANISTER PUMP MODULE) Click here

   A

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

   

   Tech Tips

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

   1. 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.

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

      Result

      DTC*2	Result	Suspected Trouble Area	Proceed to
      -	EVAP pressure in inspection item (B) is between -4.85 kPa(gauge) and -1.057 kPa(gauge) [-36.38 mmHg(gauge) and -7.929 mmHg(gauge)]	Not yet determined	A
      P043F and P2401	EVAP pressure in inspection item (B) is -1.057 kPa(gauge) [-7.929 mmHg(gauge)] or higher	Reference orifice high-flow Leak detection pump stuck off	B
      P043E	EVAP pressure in inspection item (B) is less than -4.85 kPa(gauge) [-36.38 mmHg(gauge)]	Reference orifice clogged	C
      P2419	EVAP pressure in inspection item (A) is higher than -0.25 kPa(gauge) [-1.875 mmHg(gauge)]	Vent valve stuck closed Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit)	D

      *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) Click here

   C

   REPLACE CANISTER PUMP MODULE Click here

   D

   INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Click here

   A

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

   

   1. Check the EVAP pressure in step 3/6.

      Result

      DTC*	Result	Suspected Trouble Area	Proceed to
      -	EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or higher within 10 seconds of proceeding from step 2/6 to step 3/6	Not yet determined	A
      P2420	No variation in EVAP pressure even after proceeding from step 2/6 to step 3/6	Vent valve stuck open (vent) Canister (charcoal filter inside canister) clogged	B
      P0451	No variation in EVAP pressure during steps 1/6 through 3/6	Canister pressure sensor output value stuck Vent valve broken (valve split in two) Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit)	C

      *: 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) Click here

   C

   CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND) Click here

   A

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

   

   1. Wait until the EVAP pressure change is less than 0.1 kPa(gauge) [0.75 mmHg(gauge)] for 40 seconds.

   2. Measure the EVAP pressure and record it.

      Tech Tips

      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

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

   

   1. Check the EVAP pressure in step 4/6.

      Result

      DTC*1	Result	Suspected Trouble Area	Proceed to
      -	EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or higher within 10 seconds of proceeding from step 3/6 to step 4/6	Not yet determined	A
      P0441 *2	EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or higher within 10 seconds of proceeding from step 3/6 to step 4/6	Purge VSV Purge VSV circuit Problems in EVAP hose between purge VSV and intake air surge tank assembly Problems in EVAP hose between canister and purge VSV ECM	B
      P0441	Variation in EVAP pressure is less than 0.3 kPa(gauge) [2.25 mmHg(gauge)] for 10 seconds, after proceeding from step 3/6 to step 4/6	Purge VSV stuck closed Purge VSV circuit Canister (charcoal filter inside canister) clogged Problems in EVAP hose between purge VSV and intake air surge tank assembly Problems in EVAP hose between canister and purge VSV ECM	C

      • *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) Click here

   C

   PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV) Click here

   A

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

    

    1. Check the EVAP pressure in step 5/6.

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

       Result

       DTC*	Result	Suspected Trouble Area	Proceed to
       -	EVAP pressure from step 3/6 lower than second reference pressure (step 5/6)	Not yet determined (no leakage from EVAP system)	A
       P0441 and P0455	EVAP pressure from step 3/6 higher than [second reference pressure (step 5/6) x 0.2]	Purge VSV stuck open EVAP gross leak	B
       P0456	EVAP pressure from step 3/6 higher than second reference pressure (step 5/6)	EVAP small leak	B

       *: 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 Click here

    B

    PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV) Click here

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

    

    1. Check the EVAP pressure in step 3/6.

       Result

       DTC*	Result	Suspected Trouble Area	Proceed to
       P043F	EVAP pressure less than [reference pressure] measured in step 2/6	Reference orifice high-flow	A
       P2401	EVAP pressure almost same as [reference pressure] measured in step 2/6	Leak detection pump stuck off	B

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

       Tech Tips

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

    A

    REPLACE CANISTER PUMP MODULE Click here

    B

    CHECK TERMINAL VOLTAGE (CANISTER PUMP MODULE) Click here

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

    1. Check the canister pressure sensor circuit, referring to DTC P0451 canister pressure sensor circuit inspection procedure Click here.

    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

13. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

    1. Turn the engine switch off.

    2. Disconnect the canister pump module connector.

       

       Text in Illustration

       *a	Component without harness connected (Canister Pump Module)

    3. Apply the battery voltage to terminals VLVB and VGND of the canister pump module.

    4. Touch the canister pump module to confirm the vent valve operation.

       Result

       Condition	Tester Result	Suspected Trouble Area	Proceed to
       Apply battery voltage to terminals VLVB and VGND	Operating	Wire harness or connector between vent valve and ECM Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM	A
       	Not operating	Vent valve	B

    B

    REPLACE CANISTER PUMP MODULE Click here

    A

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

    1. Turn the engine switch off.

    2. Disconnect the ECM connector.

    3. Disconnect the canister pump module connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition A25-7 (VPMP) - N35-1 (VGND) Always Below 1 Ω A25-7 (VPMP) or N35-1 (VGND) - Body ground Always 10 kΩ or higher

       Result

       Result	Suspected Trouble Area	Proceed to
       OK	Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM	A
       NG	Wire harness or connector between ECM and canister pump module	B

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    A

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

    1. Disconnect the canister pump module connector.

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

       Result

       Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
       N35-4 (MGND) - Body ground	Always	Below 1 Ω	Canister pump module Wire harness or connector between canister pump module and ECM ECM	A
       		10 kΩ or higher	Wire harness or connector between canister pump module and body ground	B

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    A

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

    1. Disconnect the canister pump module connector.

    2. Disconnect the ECM connector.

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

       Result

       Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
       A25-6 (MPMP) - N35-3 (MTRB)	Always	Below 1 Ω	Canister pump module ECM	A
       		10 kΩ or higher	Wire harness or connector between ECM and canister pump module	B

    A

    REPLACE CANISTER PUMP MODULE Click here

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

17. PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV)

    1. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control.

    2. Disconnect the fuel vapor feed hose assembly (connected to the canister) from the purge VSV.

       

       Text in Illustration

       *1	Purge VSV
       *2	Fuel Vapor Feed Hose Assembly (to Canister)

    3. Start the engine.

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

    5. Use your finger to confirm that the purge VSV has no suction.

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

    7. Use your finger to confirm that the purge VSV has suction.

       Result

       Test Result	Suspected Trouble Area	Proceed to
       No suction when purge VSV turned off, and suction applied when turned on	Blockage in the purge line is considered (based on result of step 9): Problems with EVAP hose between canister and purge VSV Canister (charcoal filter inside canister) clogged ECM	A
       	Leakage is considered (based on result of step 10): Fuel cap Leakage from EVAP line, fuel tank, or canister	B
       Suction applied when purge VSV turned off	Purge VSV stuck open	C
       No suction when purge VSV turned on	Purge VSV stuck closed Problems with EVAP hose between purge VSV and intake air surge tank assembly	D

    B

    CHECK FUEL CAP Click here

    C

    INSPECT PURGE VSV Click here

    D

    CHECK EVAP HOSE (PURGE VSV - INTAKE AIR SURGE TANK ASSEMBLY) Click here

    A

18. INSPECT EVAP HOSE (PURGE VSV - CANISTER)

    1. 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) Click here

    OK

19. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

    1. Check for filter blockage in the canister Click here.

       OK
       No blockages in the canister.

    OK

    REPLACE ECM Click here

    NG

    REPLACE CANISTER Click here

20. CHECK FUEL CAP

    1. Check that the fuel cap is correctly installed and confirm that the fuel cap meets OEM specifications.

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

       Tech Tips

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

       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 27.75 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 higher, the fuel cap is normal.

          Result

          Test Result	Suspected Trouble Area	Proceed to
          Fuel cap correctly installed	-	A
          Fuel cap loose	Fuel cap improperly installed Defective fuel cap Fuel cap does not meet OEM specifications	B
          Defective fuel cap	-	B
          No fuel cap	-	C

    A

    LOCATE EVAP LEAK PART Click here

    B

    CORRECTLY REINSTALL OR REPLACE FUEL CAP Click here

    C

    REPLACE FUEL CAP Click here

21. INSPECT PURGE VSV

    1. Turn the engine switch off.

    2. Disconnect the purge VSV connector.

       

       Text in Illustration

       *1	Fuel Vapor Feed Hose Assembly (to Canister)
       *2	Purge VSV Connector
       *3	Purge VSV

    3. Disconnect the fuel vapor feed hose assembly (connected to the canister) from the purge VSV.

    4. Start the engine.

    5. Use your finger to confirm that the purge VSV has no suction.

       Result

       Test Result	Suspected Trouble Area	Proceed to
       No suction	Wire harness or connector between purge VSV and ECM ECM	A
       Suction applied	Purge VSV	B

    A

    CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM) Click here

    B

    REPLACE PURGE VSV Click here

22. INSPECT EVAP HOSE (PURGE VSV - CANISTER)

    1. 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) Click here

    OK

23. CHECK EVAP HOSE (PURGE VSV - INTAKE AIR SURGE TANK ASSEMBLY)

    1. Disconnect the fuel vapor feed hose assembly (connected to the intake air surge tank assembly) from the purge VSV.

       

       Text in Illustration

       *1	Purge VSV
       *2	Fuel Vapor Feed Hose Assembly (to Intake Air Surge Tank Assembly)

    2. Start the engine.

    3. Use your finger to confirm that the hose has suction.

       Result

       Test Result	Suspected Trouble Area	Proceed to
       Suction applied	EVAP hose between purge VSV and intake air surge tank assembly normal Purge VSV Purge VSV power source Wire harness or connector between purge VSV and ECM	A
       No suction	Intake air surge tank assembly port EVAP hose between purge VSV and intake air surge tank assembly	B

    B

    INSPECT INTAKE AIR SURGE TANK ASSEMBLY (EVAP PURGE PORT) Click here

    A

24. INSPECT PURGE VSV

    1. Remove the purge VSV.

    2. Apply battery voltage to the terminals of the purge VSV.

       

       Text in Illustration

       *1

       Purge VSV

    3. Confirm that air flows from port E to port F.

       Result

       Test Result	Condition	Suspected Trouble Area	Proceed to
       Air flows	Battery voltage is applied to purge VSV terminals	Purge VSV normal Purge VSV power source Wire harness or connector between purge VSV and ECM	A
       No air flow	Battery voltage is applied to purge VSV terminals	Purge VSV	B

    B

    REPLACE PURGE VSV Click here

    A

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

    1. Disconnect the purge VSV connector.

       

       Text in Illustration

       *a	Front view of wire harness connector (to Purge VSV)

    2. Turn the engine switch on (IG).

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

       Result

       Tester Connection	Switch Condition	Specified Condition	Suspected Trouble Area	Proceed to
       E50-1 - Body ground	Engine switch on (IG)	11 to 14 V	Purge VSV power source normal Wire harness or connector between purge VSV and ECM	A
       		Other than result above	Wire harness or connectors between purge VSV and battery	B

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    A

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

    1. Disconnect the ECM connector.

    2. Disconnect the purge VSV connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition E50-2 - E26-48 (PRG) Always Below 1 Ω E50-2 or E26-48 (PRG) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

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

    1. Turn the engine switch off.

       

       Text in Illustration

       *a

       Front view of wire harness connector (to Canister Pump Module)

       -

       -

    2. Disconnect the canister pump module connector.

    3. Turn the engine switch on (IG).

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

       Result

       Tester Connection	Switch Condition	Specified Condition	Suspected Trouble Area	Proceed to
       N35-5 (VLVB) - Body ground	Engine switch on (IG)	11 to 14 V	Wire harness or connector between vent valve and ECM Vent valve Canister (charcoal filter inside canister) clogged ECM	A
       		Below 3 V	Power source wire harness of vent valve	B

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    A

28. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

    1. Turn the engine switch off.

    2. Disconnect the canister pump module connector.

       

       Text in Illustration

       *a	Component without harness connected (Canister Pump Module)

    3. Apply the battery voltage to terminals VLVB and VGND of the canister pump module.

    4. Touch the canister pump module to confirm the vent valve operation.

       Result

       Condition	Tester Result	Suspected Trouble Area	Proceed to
       Apply battery voltage to terminals VLVB and VGND	Operating	Wire harness or connector between vent valve and ECM Canister (charcoal filter inside canister) clogged ECM	A
       	Not operating	Vent valve	B

    B

    REPLACE CANISTER PUMP MODULE Click here

    A

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

    1. Turn the engine switch off.

    2. Disconnect the canister pump module connector.

    3. Disconnect the ECM connector.

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

       Result

       Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
       N35-1 (VGND) - A25-7 (VPMP)	Always	Below 1 Ω	Canister (charcoal filter inside canister) clogged ECM	A
       		10 kΩ or higher	Wire harness or connector between ECM and canister pump module	B

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    A

30. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

    1. Check for filter blockage in the canister Click here.

       OK
       No blockages in the canister.

    OK

    REPLACE ECM Click here

    NG

    REPLACE CANISTER Click here

31. CHECK TERMINAL VOLTAGE (CANISTER PUMP MODULE)

    1. Turn the engine switch off.

    2. Disconnect the canister pump module connector.

       

       Text in Illustration

       *a

       Front view of wire harness connector (to Canister Pump Module)

       -

       -

    3. Turn the engine switch on (IG).

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

       Result

       Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
       N35-3 (MTRB) - Body ground	Engine switch on (IG)	9 to 14 V	Wire harness or connector between leak detection pump and body ground Leak detection pump	A
       		Below 3 V	Wire harness or connector between leak detection pump and ECM ECM	B

    B

    CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE) Click here

    A

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

    1. Turn the engine switch off.

    2. Disconnect the canister pump module connector.

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

       Result

       Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
       N35-4 (MGND) - Body ground	Always	Below 1 Ω	Leak detection pump	A
       		10 kΩ or higher	Wire harness or connector between canister pump module and body ground	B

    A

    REPLACE CANISTER PUMP MODULE Click here

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

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

    1. Turn the engine switch off.

    2. Disconnect the ECM connector.

    3. Disconnect the canister pump module connector.

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

       Standard Resistance
       Tester Connection Condition Specified Condition A25-6 (MPMP) - N35-3 (MTRB) Always Below 1 Ω A25-6 (MPMP) or N35-3 (MTRB) - Body ground Always 10 kΩ or higher

       Result

       Result	Suspected Trouble Area	Proceed to
       OK	ECM	A
       NG	Wire harness or connector between ECM and canister pump module	B

    A

    REPLACE ECM Click here

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

34. INSPECT INTAKE AIR SURGE TANK ASSEMBLY (EVAP PURGE PORT)

    1. Stop the engine.

    2. Disconnect the EVAP hose from the intake air surge tank assembly.

    3. Start the engine.

    4. Use your finger to confirm that the port of the intake air surge tank assembly has suction.

       Result

       Tester Connection	Suspected Trouble Area	Proceed to
       Suction applied	EVAP hose between intake air surge tank assembly and purge VSV	A
       No suction	Intake air surge tank assembly	B

    A

    REPAIR OR REPLACE EVAP PURGE LINE (INTAKE AIR SURGE TANK ASSEMBLY - PURGE VSV) Click here

    B

    INSPECT INTAKE AIR SURGE TANK ASSEMBLY (EVAP PURGE PORT) Click here

35. CORRECTLY REINSTALL OR REPLACE FUEL CAP

    Tech Tips

    • 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) Click here

36. REPLACE FUEL CAP

    Tech Tips

    When installing the fuel cap, tighten it firmly (only one click sound could be head).

    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

37. LOCATE EVAP LEAK PART

    1. Disconnect the vent hose.

       

       Text in Illustration

       *1	Fuel Tank	*2	Canister
       *3	Canister Filter	*4	Fuel Cap
       *5	Canister Pump Module	-	-
       *a	Disconnect the vent hose here	-	-

    2. Connect the EVAP pressure tester tool to the canister pump module with the adapter.

       

       Text in Illustration

       *1	Canister Pump Module	*2	Adapter
       *3	EVAP Pressure Tester Tool	-	-

    3. Pressurize the EVAP system to 3.2 to 3.7 kPa(gauge) [24 to 28 mmHg(gauge)].

    4. Apply soapy water to the piping and connecting parts of the EVAP system.

    5. Look for areas where bubbles appear. This indicates the leak point.

    6. Repair or replace the leak point.

       Tech Tips

       Disconnect the hose between the canister and 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) Click here

38. REPLACE CANISTER PUMP MODULE

    1. Replace the canister pump module Click here.

       Note

       • 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.

       • Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace canister and canister pump module together.

       • Check for filter blockage in the canister filter. if the canister filter has blockages, replace the canister filter.

       

       Text in Illustration

       *1	Fuel Tank Vent Hose	*2	Air Inlet Port
       *3	Vent Hose	*4	Fuel Tank
       *5	Canister Pump Module	*6	Canister
       *7	Canister Filter	-	-
       *a	Inspection Area (check for disconnection and/or cracks)	-	-

    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

39. REPLACE PURGE VSV

    1. Replace the purge VSV Click here.

    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

40. INSPECT INTAKE AIR SURGE TANK ASSEMBLY (EVAP PURGE PORT)

    1. Check that the EVAP purge port of the intake air surge tank assembly is not clogged. If necessary, replace the intake air surge tank assembly Click here.

    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

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

    1. 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) Click here

42. REPLACE CANISTER PUMP MODULE

    1. Replace the canister pump module Click here.

       Note

       • 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.

       • Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace canister and canister pump module together.

       • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

       

       Text in Illustration

       *1	Fuel Tank Vent Hose	*2	Air Inlet Port
       *3	Vent Hose	*4	Fuel Tank
       *5	Canister Pump Module	*6	Canister
       *7	Canister Filter	-	-
       *a	Inspection Area (check for disconnection and/or cracks)	-	-

    NEXT

43. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

    Note

    • The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 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 fuel tank leak check 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 fuel temperature below 35°C (95°F).

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

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

       Result	Proceed to
       EVAP system DTCs are output	A
       DTC is not output (Pending DTC is not output)	B

    B

    END

    A

44. REPLACE ECM

    1. Replace the ECM Click here.

    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

45. REPLACE CANISTER

    1. Replace the canister Click here.

       Note

       • When replacing the canister, check the canister pump module 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.

       • Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

       

       Text in Illustration

       *1	Fuel Tank Vent Hose	*2	Air Inlet Port
       *3	Vent Hose	*4	Fuel Tank
       *5	Canister Pump Module	*6	Canister
       *7	Canister Filter	-	-
       *a	Inspection Area (check for disconnection and/or cracks)	-	-

    NEXT

46. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

    Note

    • The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 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 fuel tank leak check 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 fuel temperature below 35°C (95°F).

    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

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

       Tech Tips

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

    NEXT

    END

CONFIRMATION DRIVING PATTERN

1. KEY-OFF MONITOR CONFIRMATION

   1. 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 2400 m (7875 ft).

      • The engine coolant temperature is between 4.4 and 35°C (40 and 95°F).

      • The intake air temperature is between 4.4 and 35°C (40 and 95°F).

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

   2. Monitor Conditions

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

      2. Turn the engine switch off and wait for 6 hours (8 or 10.5 hours).

         Tech Tips

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

   3. Monitor Status

      1. Connect the Techstream to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the Techstream on.

      4. Enter the following menus: Powertrain / Engine / Monitor / Current Monitor.

      5. Check the Monitor Status displayed on the Techstream.

         Tech Tips

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

2. PURGE FLOW MONITOR CONFIRMATION (P0441)

   Tech Tips

   Perform this monitor confirmation after the Key-Off Monitor Confirmation shows Complete.

   1. 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 engine coolant temperature is 4.4°C (40°F) or higher.

      • The intake air temperature is 4.4°C (40°F) or higher.

   2. Monitor Conditions

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

      2. Warm the engine up until the engine coolant temperature reaches higher 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 switch on for 1 minute.

   3. Monitor Status

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

      2. Connect the Techstream to the DLC3.

      3. Turn the engine switch on (IG).

      4. Turn the Techstream on.

      5. Enter the following menus: Powertrain / Engine / Monitor / Current Monitor.

      6. Check the Monitor Status displayed on the Techstream.

         Tech Tips

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

MONITOR RESULT

Refer to detailed information in Checking Monitor Status Click here.