SFI SYSTEM(w/ Canister Pump Module) EVAP System

RELATED DTCS

DTC No. Monitoring Item Link
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

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 output, the malfunctioning area can be determined using the table below.

A01O8OKE03

Note

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

DESCRIPTION

A01O8HFC01
*1 Purge VSV *2 Fuel Vapor Feed Hose Assembly (EVAP Hose) (to Intake Manifold)
*3 Fuel Vapor Feed Hose Assembly (EVAP Hose) (from Canister) *4

Canister Pump Module

- Canister Pressure Sensor

- Leak Detection Pump

- Vent Valve
*5 Canister *6 Canister Filter
*7 Air Inlet Port *8 Fuel Cap
*9 Fuel Tank - -
*a Location of EVAP (Evaporative Emission) System *b Purge Line

Tech Tips

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

A01O8DFC01
*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 Cap - -
*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 the 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 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 power 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 power 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 power 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 0.5 kPa(gauge) [3.75 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 in atmospheric pressure, before and after of the purge flow monitor, is measured by the ECM.

    A01O8L2C04
    *1 Canister *2 to Intake Manifold
    *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 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 power 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.
    A01O87WC05
    *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 - -
    A01O8IEE79
    A01O8EDE06

WIRING DIAGRAM

Refer to DTC P0451.

Click here

CAUTION / NOTICE / HINT

Note


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

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.


  1. 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 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 fuel temperature less than 35°C (95°F).


    1. Connect the GTS to the DLC3.

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

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

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

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

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

    9. 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.

  2. 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 power 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 power switch off and wait for at least 30 seconds.

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

    6. Put the engine in inspection mode (maintenance mode).

      Click here

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

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

    9. 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.

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

    11. Input the DTC: P0441.

    12. 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.

    13. Turn the power switch off.

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

    15. Turn the power switch on (IG) and turn the GTS on.

    16. Put the engine in inspection mode (maintenance mode).

      Click here

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

    18. Increase the engine speed to 2500 rpm once.

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

    20. 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.

PROCEDURE


  1. CONFIRM DTC


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

    2. Turn the power switch on (IG).

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

    4. Connect the GTS to the DLC3.

    5. Turn the power switch on (IG).

    6. Turn the GTS on.

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


      Powertrain > Engine and ECT > 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.

      A01O8OKE03

      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.

      Result
      Proceed to
      NEXT

    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 less than 35°C (95°F).


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here

    5. Turn the power switch off and wait for at least 30 seconds.

    6. Turn the power switch on (IG) and turn the GTS on.

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


      Powertrain > Engine and ECT > Utility
      Tester Display
      Evaporative System Check

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


      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.

      Result
      Proceed to
      NEXT

    NEXT

  3. PERFORM EVAP SYSTEM CHECK (MANUAL MODE)

    A01O8XFE07

    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 less than 35°C (95°F).


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here


      Powertrain > Engine > Clear DTCs

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


      Powertrain > Engine and ECT > Utility
      Tester Display
      Evaporative System Check
      Result
      Proceed to
      NEXT

    NEXT

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

    A01O8UFE02

    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) [315.82568 mmHg(abs)] or 123.76147 kPa(abs) [928.21103 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 power switch is turned on (IG).

      Tech Tips

      *3: Canister pressure sensor standard output range is 70 to 111 kPa(abs) [525 to 836 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)

    A01O7NTE02

    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)

    A01O93QE02

    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

    GO TO STEP 48 Click here

    D

    INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION) Click here

    A

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

    A01O94SE02

    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

      • *: 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

    A

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

    A01O8B5E02

    1. Wait until the EVAP pressure change is less than 0.12 kPa(gauge) [0.9 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.

      Result
      Proceed to
      NEXT

    NEXT

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

    A01O84DE02

    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 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)

    A01O929E02

    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

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


    B

    GO TO STEP 20 Click here

    A

  11. 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.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 24 Click here

  12. 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.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 25 Click here

    OK

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


    1. A01O82UC01
      *1 Purge VSV
      *2 Fuel Vapor Feed Hose Assembly (to Intake Manifold)

      Disconnect the fuel vapor feed hose assembly (connected to the intake manifold) from the purge VSV.

    2. Put the engine in inspection mode (maintenance mode).

      Click here


      Powertrain > Hybrid Control > Utility
      Tester Display
      Inspection Mode

    3. Start the engine.

    4. 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

  14. INSPECT PURGE VSV


    1. Remove the purge VSV.

    2. A01O844C01
      *a Port E
      *b Port F
      *c Air

      Apply auxiliary 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 Auxiliary 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 Auxiliary battery voltage is applied to purge VSV terminals Purge VSV B

    B

    GO TO STEP 31 Click here

    A

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


    1. A01O8VVC25
      *a

      Front view of wire harness connector

      (to Purge VSV)

      Disconnect the purge VSV connector.

    2. Turn the power switch on (IG).

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

      Result
      Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to
      C32-1 - Body ground Power 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 auxiliary battery B

    B

    GO TO STEP 44 Click here

    A

  16. 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
      C32-2 - C48-68 (PRG) Always Below 1 Ω
      C32-2 or C48-68 (PRG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 43 Click here

    NG

    GO TO STEP 44 Click here

  17. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)


    1. Stop the engine.

    2. Disconnect the EVAP hose from the intake manifold.

    3. Put the engine in inspection mode (maintenance mode).

      Click here


      Powertrain > Hybrid Control > Utility
      Tester Display
      Inspection Mode

    4. Start the engine.

    5. 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

    B

    INSPECT INTAKE MANIFOLD (EVAP PURGE PORT) Click here

    A

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

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 24 Click here

  19. 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

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 24 Click here

  20. PERFORM ACTIVE TEST USING GTS (PURGE VSV)


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


      Powertrain > Engine and ECT > Active Test
      Tester Display
      Activate the VSV for Evap Control
    2. A01O7SDC01
      *1 Purge VSV
      *2 Fuel Vapor Feed Hose Assembly (to Canister)

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

    3. Put the engine in inspection mode (maintenance mode).

      Click here


      Powertrain > Hybrid Control > Utility
      Tester Display
      Inspection Mode

    4. Start the engine.

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

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

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

    8. 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 manifold

      		 D

    B

    CHECK FUEL CAP Click here

    C

    INSPECT PURGE VSV Click here

    D

    GO TO STEP 13 Click here

    A

  21. 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.
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  22. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)


    1. Check for filter blockage in the canister.

      Click here

      OK
      No blockages in the canister.
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 43 Click here

    NG

  23. 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.

      A01O8GOC01
      *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)

      		 - -
      Result
      Proceed to
      NEXT

    NEXT

  24. 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 power switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here


      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the power switch off and wait for at least 30 seconds.

    6. Turn the power switch on (IG) and turn the GTS on.

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


      Powertrain > Engine and ECT > Utility
      Tester Display
      Evaporative System Check

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


      Powertrain > Engine and ECT > Trouble Codes

      Tech Tips

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

      Result
      Proceed to
      NEXT

    NEXT

    END

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

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 24 Click here

  26. 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 -
      No fuel cap - C

    B

    CORRECTLY REINSTALL OR REPLACE FUEL CAP Click here

    C

    REPLACE FUEL CAP Click here

    A

  27. LOCATE EVAP LEAK PART


    1. Disconnect the vent hose.

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

      A01O82AC01
      *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.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 24 Click here

  28. CORRECTLY REINSTALL OR REPLACE FUEL CAP

    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.

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 24 Click here

  29. REPLACE FUEL CAP

    Tech Tips

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

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 24 Click here

  30. INSPECT PURGE VSV


    1. Turn the power switch off.

    2. A01O84EC01
      *1 Purge VSV
      *2 Fuel Vapor Feed Hose Assembly (to Canister)

      Disconnect the purge VSV connector.

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

    4. Put the engine in inspection mode (maintenance mode).

      Click here


      Powertrain > Hybrid Control > Utility
      Tester Display
      Inspection Mode

    5. Start the engine.

    6. 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

    GO TO STEP 16 Click here

    B

  31. REPLACE PURGE VSV


    1. Replace the purge VSV.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 24 Click here

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

    A01O85FC02
    *a

    Front view of wire harness connector

    (to Canister Pump Module)

    1. Turn the power switch off.

    2. Disconnect the canister pump module connector.

    3. Turn the power switch on (IG).

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

      Result
      Tester Connection Condition Specified Condition Suspected Trouble Area Proceed to
      b3-5 (VLVB) - Body ground Power 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

    GO TO STEP 44 Click here

    A

  33. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

    A01O8QMC01
    *a

    Component without harness connected

    (Canister Pump Module)

    1. Turn the power switch off.

    2. Disconnect the canister pump module connector.

    3. Apply the auxiliary 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 auxiliary 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

    GO TO STEP 48 Click here

    A

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


    1. Turn the power 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
      b3-1 (VGND) - A35-7 (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

    GO TO STEP 44 Click here

    A

  35. INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)


    1. Check for filter blockage in the canister.

      Click here

      OK
      No blockages in the canister.
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 43 Click here

    NG

    GO TO STEP 23 Click here

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

    A01O7Q0E02

    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

    GO TO STEP 48 Click here

    B

    GO TO STEP 45 Click here

  37. INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

    A01O8QMC01
    *a

    Component without harness connected

    (Canister Pump Module)

    1. Turn the power switch off.

    2. Disconnect the canister pump module connector.

    3. Apply the auxiliary 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 auxiliary 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

    GO TO STEP 48 Click here

    A

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


    1. Turn the power 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
      A35-7 (VPMP) - b3-1 (VGND) Always Below 1 Ω
      A35-7 (VPMP) or b3-1 (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

  39. 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
      b3-4 (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

    GO TO STEP 44 Click here

    A

  40. 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
      A35-19 (MPMP) - b3-3 (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

    B

    GO TO STEP 44 Click here

    A

  41. 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.

      A01O8GOC01
      *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)

      		 - -
      Result
      Proceed to
      NEXT

    NEXT

  42. 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 power switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here


      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the power switch off and wait for at least 30 seconds.

    6. Turn the power switch on (IG) and turn the GTS on.

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


      Powertrain > Engine and ECT > Utility
      Tester Display
      Evaporative System Check

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


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      EVAP system DTCs are output A

      DTCs are not output

      (Pending DTC is not output)

      		 B

    B

    END

    A

  43. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 24 Click here

  44. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 24 Click here

  45. CHECK TERMINAL VOLTAGE (CANISTER PUMP MODULE)

    A01O85FC03
    *a

    Front view of wire harness connector

    (to Canister Pump Module)

    1. Turn the power switch off.

    2. Disconnect the canister pump module connector.

    3. Turn the power 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
      b3-3 (MTRB) - Body ground Power 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

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


    1. Turn the power 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
      b3-4 (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

    GO TO STEP 48 Click here

    B

    GO TO STEP 44 Click here

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


    1. Turn the power 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
      A35-19 (MPMP) - b3-3 (MTRB) Always Below 1 Ω
      A35-19 (MPMP) or b3-3 (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

    GO TO STEP 43 Click here

    B

    GO TO STEP 44 Click here

  48. 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.

      A01O8GOC01
      *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)

      		 - -
      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 24 Click here

  49. 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

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 24 Click here