SFI SYSTEM EVAP System

RELATED DTCS

DTC No. Monitoring Item See page
P043E Reference orifice clogged (built into canister pump module)

Click here

P043F Reference orifice high-flow (built into canister pump module)
P0441

  • Purge VSV (Vacuum Switching Valve) stuck closed

  • Purge VSV stuck open

  • Purge flow

Click here

P0451

  • Canister pressure sensor (built into canister pump module) signal noise

  • Canister pressure sensor (built into canister pump module) signal becomes fixed/flat

Click here

P0452 Canister pressure sensor (built into canister pump module) voltage low
P0453 Canister pressure sensor (built into canister pump module) voltage high
P0455 EVAP gross leak

Click here

P0456 EVAP small leak
P2401 Leak detection pump stuck OFF (built into canister pump module)

Click here

P2402 Leak detection pump stuck ON (built into canister pump module)
P2419 Vent valve stuck closed (built into canister pump module)
P2420 Vent valve stuck open (vent) (built into canister pump module)

Click here

P2610 Soak timer (built into ECM)

Click here

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

A01FEYAE01

Note

If the reference pressure difference between the first and second checks is more than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P0441, P0455, P0456, P2401, P2420) will all be stored.

DESCRIPTION

A01FEYQE01
*1 Purge VSV *2 EVAP Hose (to Intake Manifold)
*3 EVAP Hose (from Canister) *4 Purge Line
*5 Fuel Tank *6 Canister
*7

Canister Pump Module

- Canister Pressure Sensor

- Leak Detection Pump

- Vent Valve

 *8 Canister Filter
*9 Air Inlet Port *10 Fuel Tank Cap Assembly
*a Location of EVAP (Evaporative Emission) System - -

Tech Tips

The canister pressure sensor, the leak detection pump and the vent valve are built into the canister pump module.

A01FGFQE03
Text in Illustration
*1 Canister Pump Module *2 Intake Manifold
*3 Purge VSV *4 Throttle Valve
*5 Canister *6 Cut-off Valve
*7 Fuel Tank *8 Air Cleaner
*9 ECM *10 Canister Filter
*11 Soak Timer *12 Roll-over Valve
*13 Fuel Tank Cap Assembly - -
*a EVAP System Circuit - -

Note

In the EVAP system of this vehicle, turning ON the vent valve does not seal off the EVAP system. To check for leaks in the EVAP system, disconnect the air inlet vent hose and apply pressure from atmospheric side of the canister.

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 manifold. 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 manifold pressure. Atmospheric pressure is allowed into the canister through the vent valve to make sure 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 below 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 below 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) [1.13 mmHg(gauge)], the ECM interprets this as the purge VSV being stuck closed, and 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.

    A01FJ50E02
    Text in Illustration
    *1 Canister *2 to Intake Manifold
    *3 ECM *4 Soak Timer
    *5 Purge VSV (On) *6 Fuel Tank Cap Assembly
    *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 manifold. ECM uses purge VSV to control EVAP purge flow. In order to discharge EVAP absorbed by canister to intake manifold, ECM opens purge VSV. EVAP discharge volume to intake manifold 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 indicates a small leak of EVAP.
    A01FERNE05
    Text in Illustration
    *1 Canister *2 Reference Orifice (0.02 Inches)
    *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 - -
    A01FF8KE87
    A01FEF3E02

WIRING DIAGRAM

Refer to DTC P0451 Click here.

INSPECTION PROCEDURE

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • The GTS is required to conduct the following diagnostic troubleshooting procedure.

Tech Tips


  • Using the GTS monitor results enables the EVAP (Evaporative Emission) system to be confirmed.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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 GTS to the DLC3.

    5. Turn the engine switch on (IG) and turn the GTS on.

    6. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    7. Confirm DTCs and freeze frame data.

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

      A01FEYAE01

      Note

      If the reference pressure difference between the first and second checks is more 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 GTS. 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 below 35°C (95°F).


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear DTCs Click here.

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

    6. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: Powertrain / Engine and ECT / 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)

    A01FJ16E02

    Note


    • In the Evaporative System Check (Manual Mode), the series of 6 Evaporative System Check steps are performed manually using the GTS.

    • 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 below 35°C (95°F).


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear DTCs Click here.

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


    NEXT

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

    A01FEKSE54

    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 more Canister pressure sensor signal noise B

      (P0452 or P0453)

      *2

      • EVAP pressure is below 42.11 kPa(abs) [315.85 mmHg(abs)] or 123.761 kPa(abs) [928.28 mmHg(abs)] or more

      • EVAP pressure deviates +/-10 kPa [+/-75 mmHg] 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 to ON.

      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)

    A01FHU9E54

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

    A

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

    A01FFTJE53

    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) [-36.381 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 more

      • Reference orifice high-flow

      • Leak detection pump stuck OFF

      		 B
      P043E EVAP pressure in inspection item (B) is less than -4.85 kPa(gauge) [-36.384 mmHg(gauge)] Reference orifice clogged C
      P2419 EVAP pressure in inspection item (A) is more 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)

    A01FHMTE33

    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 more 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)

    A01FGOQE24

    1. Wait until the EVAP pressure change is less than 0.1 kPa(gauge) [0.75 mmHg(gauge)] for 30 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)

    A01FDSFE33

    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 more 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 more 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 manifold

      • 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 manifold

      • 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 GTS (PURGE VSV) Click here

    A

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

    A01FGS1E01

    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 less 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 GTS (PURGE VSV) Click here

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

    A01FEFLE30

    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

    PERFORM ACTIVE TEST USING TECHSTREAM (ACTIVATE THE VACUUM PUMP) 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. A01FIV1E04
      Text in Illustration
      *1

      Component without harness connected

      (Canister Pump Module)

      Disconnect the canister pump module connector.

    3. Apply the battery voltage to terminals VLVB and VGND of the 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 (CANISTER PUMP MODULE - ECM)


    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.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F1-16 (VPMP) - U41-1 (VGND) Always Below 1 Ω
      F1-16 (VPMP) or U41-1 (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
      U41-4 (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
      F1-15 (MPMP) - U41-3 (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 GTS (PURGE VSV)


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

    2. A01FHGPE01
      Text in Illustration
      *1 Purge VSV
      *2 Hose (to Canister)

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

    3. Start the engine.

    4. Using the GTS, 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 GTS, 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 assembly

      		 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 manifold

      		 D

    B

    CHECK FUEL CAP ASSEMBLY Click here

    C

    INSPECT PURGE VSV Click here

    D

    CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD) 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 ASSEMBLY Click here

  20. CHECK FUEL CAP ASSEMBLY


    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 EVAP 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 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
        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 TANK CAP ASSEMBLY Click here

    C

    REPLACE FUEL TANK CAP ASSEMBLY Click here

  21. INSPECT PURGE VSV


    1. Turn the engine switch off.

    2. A01FIXBE01
      Text in Illustration
      *1 Purge VSV
      *2 Hose (to Canister)

      Disconnect the purge VSV connector.

    3. Disconnect the hose (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 (short to ground)

      • 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 MANIFOLD)


    1. A01FDMUE01
      Text in Illustration
      *1 Purge VSV
      *2 Hose (to Intake Manifold)

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

    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 manifold normal


      • Purge VSV

      • Purge VSV power source

      • Wire harness or connector between purge VSV and ECM

      		 A
      No suction

      • Intake manifold port

      • EVAP hose between purge VSV and intake manifold

      		 B

    B

    INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Click here

    A

  24. INSPECT PURGE VSV


    1. Remove the purge VSV.

    2. A01FFY6E05
      Text in Illustration
      *1 Purge VSV

      Apply battery voltage to the terminals of the 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.

    2. A01FHHTE39
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Purge VSV)

      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
      F25-1 - 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
      F25-2 - F1-17 (PRG) Always Below 1 Ω
      F25-2 or F1-17 (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. A01FD9PE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Canister Pump Module)

      Turn the engine switch off.

    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
      U41-5 (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. A01FIV1E04
      Text in Illustration
      *1

      Component without harness connected

      (Canister Pump Module)

      Disconnect the canister pump module connector.

    3. Apply the battery voltage to terminals VLVB and VGND of the 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. Measure the resistance according to the value(s) in the table below.

      Result
      Tester Connection Condition Test Result Suspected Trouble Area Proceed to
      F1-16 (VPMP) - U41-1 (VGND) 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 ASSEMBLY Click here

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


    1. Turn the engine switch off.

    2. A01FD9PE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Canister Pump Module)

      Disconnect the canister pump module connector.

    3. Turn the engine switch on (IG).

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

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

      Result
      Tester Connection Condition Test Result Suspected Trouble Area Proceed to
      U41-3 (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

    C

    REPLACE ECM 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
      U41-4 (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 canister pump module connector.

    3. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F1-15 (MPMP) - U41-3 (MTRB) Always Below 1 Ω
      F1-15 (MPMP) or U41-3 (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 MANIFOLD (EVAP PURGE PORT)


    1. Stop the engine.

    2. Disconnect the EVAP hose from the intake manifold.

    3. Start the engine.

    4. Use your finger to confirm that the port of the intake manifold has suction.

      Result
      Tester Connection Suspected Trouble Area Proceed to
      Suction applied EVAP hose between intake manifold and purge VSV A
      No suction Intake manifold B

    A

    REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV) Click here

    B

    INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Click here

  35. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY

    Tech Tips


    • When reinstalling the fuel cap, tighten it firmly (only one click sound could be heard).

    • 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 TANK CAP ASSEMBLY

    Tech Tips

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


    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

  37. LOCATE EVAP LEAK PART


    1. Disconnect the vent hose.

      A01FEYJE01
      Text in Illustration
      *1 Vent Hose *2 Canister Pump Module
      *3 EVAP Tester *4 Adapter
      *a Disconnect the Vent Hose - -

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

    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 (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 fuel tank filler pipe assembly.

      A01FGXJE02
      Text in Illustration
      *1 Fuel Tank Vent Hose *2 Vent Hose
      *3 Air Inlet Port *4 Fuel Tank
      *5 Canister Pump Module *6 Canister Assembly
      *7 Fuel tank filter pipe assembly (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. REPAIR OR REPLACE HARNESS OR CONNECTOR


    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

  41. REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV)


    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

  42. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)


    1. Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold Click here.


    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

  43. 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

  44. REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER)


    NEXT

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

  45. 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 (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 fuel tank filler pipe assembly.

      A01FGXJE02
      Text in Illustration
      *1 Fuel Tank Vent Hose *2 Vent Hose
      *3 Air Inlet Port *4 Fuel Tank
      *5 Canister Pump Module *6 Canister Assembly
      *7 Fuel tank filter pipe assembly (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 GTS. 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 higher, 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 GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine and ECT / 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 and ECT / Trouble Codes.

      Result Proceed to
      EVAP system DTCs are output A

      No DTCs output

      (No pending DTCs output)

      		 B

    B

    PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) Click here

    A

  47. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  48. REPLACE CANISTER ASSEMBLY


    1. Replace the canister assembly (See page ).

      Note


      • When replacing the canister assembly, 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.

      A01FGXJE02
      Text in Illustration
      *1 Fuel Tank Vent Hose *2 Vent Hose
      *3 Air Inlet Port *4 Fuel Tank
      *5 Canister Pump Module *6 Canister Assembly
      *7 Fuel tank filter pipe assembly (canister filter) - -
      *a Inspection Area (check for disconnection and/or cracks) - -

    NEXT

  49. PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

    Note


    • The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the GTS. 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 higher, 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 GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Enter the following menus: Powertrain / Engine and ECT / 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 and ECT / Trouble Codes.

      Tech Tips

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


    NEXT

    END

CONFIRMATION DRIVING PATTERN

Tech Tips

After a repair, perform the Key-Off Monitor Confirmation and Purge Flow Monitor Confirmation described below and confirm that the problem is repaired.

KEY-OFF MONITOR CONFIRMATION

Note


  • The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the GTS 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 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 fuel temperature less than 35°C (95°F).


  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  2. Turn the engine switch off and wait for at least 30 seconds.

  3. Turn the engine switch on (IG) and turn the GTS on.

  4. Enter the following menus: Powertrain / Engine and ECT / Utility / Evaporative System Check / Automatic Mode.

  5. After the Evaporative System Check is completed, check for All Readiness by entering the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  6. Input the DTC: P043E, P043F, P0441, P0451, P0452, P0453, P0455, P0456, P2401, P02402, P2419 or P2420.

  7. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

PURGE FLOW MONITOR CONFIRMATION (P0441)

Tech Tips

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


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the engine switch off and wait for at least 30 seconds.

  5. Turn the engine switch on (IG) and turn the GTS on.

  6. Start the engine and wait 15 minutes or more.

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

  8. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  10. Input the DTC: P0441.

  11. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • You should perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the following procedure.

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

  13. Warm the engine up until the engine coolant temperature reaches more than 75°C (167°F).

  14. Increase the engine speed to 3000 rpm once.

  15. Allow the engine to idle and turn the A/C switch on for 1 minute.

  16. Check the DTC judgment result again.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.