Toyota Avalon Service & Repair Manual: Evaporative Emission System Leak Detection Reference Orifice Low Flow (P043E00,P043F00,P24007E,P24007F,P24187E)

Toyota Avalon Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Evaporative Emission System Leak Detection Reference Orifice Low Flow (P043E00,P043F00,P24007E,P24007F,P24187E)

DTC SUMMARY

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P043E00

Evaporative Emission System Leak Detection Reference Orifice Low Flow

Reference orifice detected as clogged during key-off EVAP monitor.

  • Canister pump module
  • Connector/wire harness (Canister pump module - ECM)
  • EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
  • ECM

Comes on

DTC stored

SAE Code: P043E

P043F00

Evaporative Emission System Leak Detection Reference Orifice High Flow

Reference orifice flow high during key-off EVAP monitor.

  • Canister pump module
  • Connector/wire harness (Canister pump module - ECM)
  • EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
  • ECM

Comes on

DTC stored

SAE Code: P043F

P24007E

Evaporative Emission System Leak Detection Pump Control Circuit Actuator Stuck On

Leak detection pump on malfunction detected during key-off EVAP monitor.

  • Canister pump module
  • Connector/wire harness (Canister pump module - ECM)
  • EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
  • ECM

Comes on

DTC stored

SAE Code: P2402

P24007F

Evaporative Emission System Leak Detection Pump Control Circuit Actuator Stuck Off

Leak detection pump off malfunction detected during key-off EVAP monitor.

  • Canister pump module
  • Connector/wire harness (Canister pump module - ECM)
  • EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
  • ECM

Comes on

DTC stored

SAE Code: P2401

P24187E

Evaporative Emission System Switching Valve Control Circuit Actuator Stuck On

Vent valve on (closed) malfunction detected during key-off EVAP monitor.

  • Canister pump module
  • Connector/wire harness (Canister pump module - ECM)
  • EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
  • ECM

Comes on

DTC stored

SAE Code: P2419

HINT:

The reference orifice is located inside the canister pump module.

DTC No.

Monitoring Item

Detection Timing

Detection Logic

SAE Code

P043E00

Reference orifice clogged

EVAP monitoring

(Power switch off)

2 trip

P043E

P043F00

Reference orifice high-flow

P043F

P24007E

Leak detection pump stuck ON

P2402

P24007F

Leak detection pump stuck OFF

P2401

P24187E

Vent valve stuck closed

P2419

DESCRIPTION

Refer to EVAP (Evaporative Emission) System.

Click here

MONITOR DESCRIPTION

In sequence B and E, the leak detection pump creates negative pressure (vacuum) through the reference orifice. The EVAP system pressure is then measured by the ECM, using the canister pressure sensor, to determine the reference pressure. If the pressure detected meets one of the following conditions, the ECM will illuminated the MIL and store a DTC (2 trip detection logic).

  • EVAP pressure is lower than the malfunction criterion.
  • EVAP pressure is higher than the malfunction criterion.
  • EVAP pressure is not saturated within 60 seconds.
  • EVAP pressure difference between sequence B and E is large.

MONITOR STRATEGY

Required Sensors/Components (Main)

Canister pump module

Required Sensors/Components (Related)

-

Frequency of Operation

Once per driving cycle

Duration

Within 7 minutes

MIL Operation

2 driving cycles

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

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)

TYPICAL MALFUNCTION THRESHOLDS

One of following conditions met

-

EVAP pressure when 1.9 seconds after reference pressure measurement began

Higher than -0.242 kPa(gauge) [-0.0351 psi(gauge)]

Reference pressure (vary with atmospheric pressure)

Less than -4.85 kPa(gauge) [-0.7 psi(gauge)]

Reference pressure (vary with atmospheric pressure)

-1.068 kPa(gauge) [-0.155 psi(gauge)] or higher

Reference pressure (vary with atmospheric pressure)

Not saturated

Reference pressure difference between the first and second

0.9 kPa(gauge) [0.1 psi(gauge)] or higher

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 higher 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

  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: P043E00, P043F00, P24007E, P24007F or P24187E.
  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.

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.

GO TO EVAP SYSTEM

(a) Refer to EVAP System.

Click here

NEXT

END

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