- DTC judgment completed
- System normal
| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001B4E8 |
| Model Year Start: 2019 | Model: Avalon HV | Prod Date Range: [04/2018 - ] |
| Title: A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P04417E,P04417F,P04419C; Evaporative Emission System Incorrect Purge Flow Actuator Stuck On; 2019 - 2022 MY Avalon HV [04/2018 - ] | ||
|
DTC |
P04417E |
Evaporative Emission System Incorrect Purge Flow Actuator Stuck On |
|
DTC |
P04417F |
Evaporative Emission System Incorrect Purge Flow Actuator Stuck Off |
|
DTC |
P04419C |
Evaporative Emission System Incorrect Purge Flow Low/Insufficient Flow |
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. |
|
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. |
|
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:
|
|
Comes on |
DTC stored |
SAE Code: P0441 |
|
DTC No. |
Monitoring Item |
Detection Timing |
Detection Logic |
SAE Code |
|---|---|---|---|---|
|
P04417E |
Purge VSV (Vacuum Switching Valve) 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.
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![2019 - 2022 MY Avalon HV [04/2018 - ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: EVAP System+](/t3Portal/stylegraphics/info.gif)
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.
-
KEY-OFF MONITOR
-
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 (Vacuum Switching Valve) being stuck open. The ECM illuminates the MIL and stores the DTC (2 trip detection logic).
-
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).
-
Purge VSV stuck open
-
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.
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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.
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-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
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P04417E and P04417F
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG) [A].
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode [B].
- After the Evaporative System Check is completed, check for All Readiness by entering the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P04417E or P04417F.
-
Check the DTC judgment result.
Techstream Display
Description
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
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG).
- Turn the Techstream on.
-
Put the engine in Inspection Mode (Maintenance Mode).
Click here
- Start the engine and wait 15 minutes or more [A].
- Enter the following menus: Powertrain / Engine / Trouble Codes [B].
-
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.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P04419C.
-
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.
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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 |
|
| B |
|
GO TO DTC CHART
|
|
|