Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026T2O |
Model Year Start: 2023 |
Model: Corolla |
Prod Date Range: [09/2022 -
] |
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: P046673; EVAP System Vent Valve Stuck Closed Actuator Stuck Closed; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] |
DTC
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P046673
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EVAP System Vent Valve Stuck Closed Actuator Stuck Closed
|
DTC SUMMARY
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
MIL
|
Memory
|
Note
|
P046673
|
EVAP System Vent Valve Stuck Closed Actuator Stuck Closed
|
Following condition is met during key-off EVAP monitor:
-
EVAP pressure change when vent valve on (closed) less than 0.3 kPa [0.04 psi]
|
-
Canister pump module (reference orifice, leak detection pump, vent valve)
-
Connector/wire harness (Canister pump module - ECM)
-
Canister (filter inside canister clogged)
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ECM
|
Comes on
|
DTC stored
|
-
SAE Code: P2422
-
DTC for Mexico Models: Does not apply
|
DTC No.
|
Monitoring Item
|
Detection Timing
|
Detection Logic
|
SAE Code
|
P046673
|
Vent valve (built into canister pump module) stuck closed
|
EVAP monitoring
(ignition switch off)
|
2 trip
|
P2422
|
HINT:
The vent valve is built into the canister pump module.
DESCRIPTION
Refer to EVAP (Evaporative Emission) System.
Click here
MONITOR DESCRIPTION
P046673: Vent valve stuck closed
In operation C, the vent valve turns on (closed) and the EVAP system pressure is then measured by the ECM using the canister pressure sensor to conduct an EVAP leak check. If the pressure does not increase when the vent valve is open, the ECM interprets this as the vent valve being stuck closed. In this case the ECM will illuminate the MIL and store this DTC.
MONITOR STRATEGY
Required Sensors/Components (Main)
|
Canister pump module
Purge VSV
|
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)
|
Ignition 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
EVAP pressure change after EVAP canister vent valve on (closed)
|
Less than 0.3 kPa [0.04 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 GTS. 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
-
Connect the GTS to the DLC3.
-
Turn the ignition switch to ON.
-
Turn the GTS on.
-
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
-
Turn the ignition switch off and wait for at least 30 seconds.
-
Turn the ignition switch to ON [A].
-
Turn the GTS 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: P046673.
-
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
|
CAUTION / NOTICE / HINT
HINT:
If the cable is disconnected from the auxiliary battery terminal, the fuel vapor containment valve cannot close completely and an EVAP SYSTEM DTC will be stored. If the DTC is output, drive the vehicle at a speed of 10 km/h (6 mph) or more and then leave the vehicle for 30 seconds or more. Then perform the Evaporative System Check again.
PROCEDURE
Click here
NEXT |
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END
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