Lexus ES manuals

Lexus ES: Evaporative Emission System Incorrect Purge Flow Actuator Stuck On (P04417E,P04417F,P04419C)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / A25a-fxs (engine Control) / Sfi System / Evaporative Emission System Incorrect Purge Flow Actuator Stuck On (P04417E,P04417F,P04419C)

DTC SUMMARY

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P04417E

Evaporative Emission System Incorrect Purge Flow Actuator Stuck On

The stabilized EVAP system pressure is higher than [second reference pressure x 0.2] and the purge VSV is judged as stuck on.

  • Purge VSV
  • Purge line
  • Connector/wire harness (Purge VSV - ECM)
  • Canister pump module
  • Canister (filter inside canister clogged)
  • Leak from EVAP system
  • ECM

Comes on

DTC stored

SAE Code: P0441

P04417F

Evaporative Emission System Incorrect Purge Flow Actuator Stuck Off

When the purge VSV is opened, the EVAP system pressure does not return to near atmospheric pressure and the purge VSV is judged as stuck off.

  • Purge VSV
  • Purge line
  • Connector/wire harness (Purge VSV - ECM)
  • Canister pump module
  • Canister (filter inside canister clogged)
  • Leak from EVAP system
  • ECM

Comes on

DTC stored

SAE Code: P0441

P04419C

Evaporative Emission System Incorrect Purge Flow Low/Insufficient Flow

The following conditions are met successively while the engine is running:

  • Vacuum not created in EVAP system when purge VSV turned on (open).
  • EVAP system pressure change is less than 0.396 kPa [0.0574 psi] when vent valve is turned on (closed).
  • Atmospheric pressure change before and after purge flow monitor is less than 0.1 kPa [0.01 psi].
  • Purge VSV
  • Purge line
  • Connector/wire harness (Purge VSV - ECM)
  • Canister pump module
  • Canister (filter inside canister clogged)
  • Leak from EVAP system
  • ECM

Comes on

DTC stored

SAE Code: P0441

DTC No.

Monitoring Item

Detection Timing

Detection Logic

SAE Code

P04417E

Purge VSV stuck on (open)

While power switch off

2 trip

P0441

P04417F

Purge VSV stuck off (closed)

While power switch off

P04419C

Purge flow

While engine running

DESCRIPTION

Refer to EVAP (Evaporative Emission) System.

Click here

MONITOR DESCRIPTION

The 2 monitors, Key-off and Purge Flow, are used to detect malfunctions relating to DTCs P04417E, P04417F and P04419C. The key-off monitor is initiated by the ECM internal timer, known as the soak timer, 5 hours* after the power switch is turned off. The purge flow monitor runs while the engine is running.

HINT:

*: 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.

  1. KEY-OFF MONITOR
    1. Purge VSV stuck open

      In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system. The EVAP system pressure is then measured by the ECM using the canister pressure sensor. If the stabilized system pressure is higher than [second reference pressure x 0.2], the ECM interprets this as the purge VSV being stuck open. The ECM illuminates the MIL and stores the DTC (2 trip detection logic).

    2. Purge VSV stuck closed

      During sequence D, the canister pressure sensor measures the EVAP system pressure. The pressure measurement for purge VSV monitor is begun when the purge VSV is turned on (open) after the EVAP leak check. When the measured pressure indicates an increase of 0.3 kPa [0.04 psi] or higher, the purge VSV is functioning normally. If the pressure does not increase, the ECM interprets this as the purge VSV being stuck closed. The ECM illuminates the MIL and stores the DTC (2 trip detection logic).

  2. PURGE FLOW MONITOR

    The purge flow monitor consists of 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 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 0.396 kPa [0.0574 psi], the ECM interprets this as the Purge VSV being stuck closed. The ECM illuminates the MIL and stores DTC P04419C (2 trip detection logic).

Atmospheric pressure check:

In order to ensure reliable malfunction detection, the variation in atmospheric pressure, before and after performing the purge flow monitor, is measured by the ECM.

MONITOR STRATEGY

Required Sensors/Components (Main)

Purge VSV

Canister pump module

Required Sensors/Components (Related)

-

Frequency of Operation

Once per driving cycle

Duration

Within 30 seconds: Purge flow

Within 20 minutes: Purge VSV stuck open/closed

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Key-off Monitor (Purge VSV Stuck Open/Closed)

Key-off monitor runs when all of the following conditions are met

-

Atmospheric pressure

70 kPa(abs) [10.2 psi(abs)] or higher, and less than 110 kPa(abs) [16 psi(abs)]

Auxiliary battery voltage

10.5 V or higher

Vehicle speed

Less than 4 km/h (2.5 mph)

Power switch

Off

Engine condition

Not running

Key-OFF duration

5, 7 or 9.5 hours

Pressure sensor of canister pump module malfunction (P0451, P0452, P0453)

Not detected

Fuel tank pressure sensor malfunction (P1451, P1452, P1453)

Not detected

Purge VSV

Not operated by scan tool

Vent valve

Not operated by scan tool

Fuel vapor-containment valve

Not operated by scan tool

Leak detection pump

Not operated by scan tool

Purge flow before key-OFF

Performed

Engine coolant temperature

4.4°C (39.9°F) or higher, and less than 35°C (95°F)

Intake air temperature

4.4°C (39.9°F) or higher, and less than 35°C (95°F)

Purge Flow Monitor

Engine

Running

Engine coolant temperature

4.4°C (39.9°F) or higher

Intake air temperature

4.4°C (39.9°F) or higher

Pressure sensor of canister pump module malfunction (P0451, P0452, P0453)

Not detected

Purge VSV

Not operated by scan tool

EVAP system check

Not operated by scan tool

Auxiliary battery voltage

10 V or higher (varies with intake air temperature)

Purge duty-cycle

8% or higher

TYPICAL MALFUNCTION THRESHOLDS

Purge VSV Stuck Open

EVAP pressure when vacuum introduction for canister was complete

Higher than [reference pressure x 0.2]

Purge VSV Stuck Closed

EVAP pressure change for 10 seconds after purge VSV on (open)

Less than 0.3 kPa [0.04 psi]

Purge Flow

Both of the following conditions are met

-

EVAP pressure change when purge flow is started

Less than 0.1 kPa [0.01 psi]

EVAP pressure change during purge flow when vent valve is on (closed)

Less than 0.396 kPa [0.0574 psi]

MONITOR RESULT

Refer to EVAP System.

Click here

CONFIRMATION DRIVING PATTERN

NOTICE:

  • The Evaporative System Check (Automatic Mode) consists of 9 steps performed automatically by the Techstream. It takes a maximum of approximately 40 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 start the engine during this operation.
  • When the temperature of the fuel is 35°C (95°F) or higher, a large amount of vapor will from and any check result will be inaccurate. When performing the Evaporative System Check, keep the fuel temperature less than 35°C (95°F).

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

P04417E and P04417F

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG) [A].
  7. Turn the Techstream on.
  8. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode [B].
  9. After the Evaporative System Check is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All Readiness.
  10. Input the DTC: P04417E or P04417F.
  11. Check the DTC judgment result.

    Techstream 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • [A] to [B]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
P04419C

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Put the engine in Inspection Mode (Maintenance Mode).

    Click here

  9. Start the engine and wait 15 minutes or more [A].
  10. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  11. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  13. Input the DTC: P04419C.
  14. Check the DTC judgment result.

    Techstream 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • [A] to [B]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

    • When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

NOTICE:

  • Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

PROCEDURE

1.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P04417E, P04417F AND/OR P04419C)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P04417E, P04417F or P04419C is output

A

DTC P04417E, P04417F or P04419C and other DTCs are output

B

HINT:

If any DTCs other than DTC P04417E, P04417F or P04419C are output, troubleshoot those DTCs first.

A

GO TO EVAP SYSTEM

B

GO TO DTC CHART

READ NEXT:

 Evaporative Emission System Pressure Sensor/Switch Circuit Short to Ground (P045011,P045015,P04502F)

DTC SUMMARY DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P045011 Evaporative Emission System Pressure Sensor/Switch Circuit Short to Ground EVAP p

 Idle Control System (P050500)

DESCRIPTION The idle speed is controlled by the electronic throttle control system. The electronic throttle control system is comprised of: 1) one valve type throttle body with motor assembly; 2) the

 Cold Start Idle Control System Performance (P050A00)

MONITOR DESCRIPTION A monitor will run when the engine is started at an engine coolant temperature of -10 (14°F) or higher, and less than 50°C (122°F). If certain conditions are met, a DTC will be

SEE MORE:

 Open in One Side of Bus 2 Branch Line

DESCRIPTION When the CAN bus main lines are normal (no open, short to ground, short to +B or short between lines) and there is an ECU or sensor on the "Communication Bus Check" screen that is indicated as not communicating or whose connection status on the "Communication Bus Check" screen changes in

 Freeze Frame Data

FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever a lighting system DTC is stored, the headlight ECU sub-assembly and forward recognition camera stores the current vehicle state as freeze frame data. CHECK FREEZE FRAME DATA (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c

© 2016-2024 Copyright www.lexguide.net