- DTC judgment completed
- System normal
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001HTL0 |
| Model Year Start: 2020 | Model: Corolla Hatchback | Prod Date Range: [03/2019 - ] |
| Title: M20A-FKS (ENGINE CONTROL): SFI SYSTEM: P045500,P045600; Evaporative Emission System Leak Detected (Large Leak); 2020 - 2025 MY Corolla Corolla Hatchback [03/2019 - ] | ||
|
DTC |
P045500 |
Evaporative Emission System Leak Detected (Large Leak) |
|
DTC |
P045600 |
Evaporative Emission System Leak Detected (Very Small Leak) |
DTC SUMMARY
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P045500 |
Evaporative Emission System Leak Detected (Large Leak) |
Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure is measured at start and end of leak check. If stabilized pressure is higher than [second reference pressure x 0.2], ECM determines that EVAP system has a large leak. |
|
Comes on |
DTC stored |
|
|
P045600 |
Evaporative Emission System Leak Detected (Very Small Leak) |
Leak detection pump creates negative pressure (vacuum) in EVAP system and EVAP system pressure is measured. Reference pressure measured at start and end of leak check. If stabilized pressure is higher than second reference pressure, ECM determines that EVAP system has a small leak. |
|
Comes on |
DTC stored |
|
|
DTC No. |
Monitoring Item |
Detection Timing |
Detection Logic |
SAE |
|---|---|---|---|---|
|
P045500 |
EVAP gross leak |
EVAP monitoring (ignition switch off) |
2 trip |
P0455 |
|
P045600 |
EVAP small leak |
P0456 |
DESCRIPTION
The description can be found in EVAP (Evaporative Emission) System.
Click here
![2020 MY Corolla Corolla Hatchback [01/2019 - 04/2020]; M20A-FKS (ENGINE CONTROL): SFI SYSTEM: EVAP System+](/t3Portal/stylegraphics/info.gif)
MONITOR DESCRIPTION
5 hours* after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.
HINT:
*: If the engine coolant temperature is not less than 35°C (95°F) 5 hours after the ignition 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 ignition switch is turned off, the monitor check starts 2.5 hours later.
|
Sequence |
Operation |
Description |
Duration |
|---|---|---|---|
|
- |
ECM activation |
Activated by soak timer 5, 7 or 9.5 hours after ignition switch turned off. |
- |
|
A |
Atmospheric pressure measurement |
Vent valve is turned off (vent) and EVAP system pressure is measured by ECM in order to register atmospheric pressure. If pressure in EVAP system is not between 70 to 110 kPa(abs) [10.15 to 15.95 psi(abs)], ECM cancels EVAP system monitor. |
60 seconds |
|
B |
First reference pressure measurement |
In order to determine reference pressure, leak detection pump creates negative pressure (vacuum) through reference orifice and then ECM checks if leak detection pump and vent valve operate normally. |
360 seconds |
|
C |
EVAP system pressure measurement |
Vent valve is turned on (closed) to shut EVAP system. Negative pressure (vacuum) is created in EVAP system, and EVAP system pressure is then measured. Write down measured value as it will be used in leak check. If EVAP pressure does not stabilize within 15 minutes, ECM cancels EVAP system monitor. |
15 minutes* |
|
D |
Purge VSV monitor |
Purge VSV is opened and then EVAP system pressure is measured by ECM. Large increase indicates normal. |
10 seconds |
|
E |
Second reference pressure measurement |
After second reference pressure measurement, leak check is performed by comparing first and second reference pressure measurements. If stabilized system pressure is higher than second reference pressure, ECM determines that EVAP system is leaking. |
60 seconds |
|
- |
Final check |
Atmospheric pressure is measured and then monitoring result is recorded by ECM. |
- |
*: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.
|
*1 |
Purge VSV: Off (Closed) |
*2 |
Purge VSV: On (Open) |
|
*3 |
Vent Valve: Off (Vent) |
*4 |
Vent Valve: On (Closed) |
|
*5 |
Leak Detection Pump: Off |
*6 |
Leak Detection Pump: On |
|
*7 |
Reference Orifice (0.02 inch) |
*8 |
Canister Pressure Sensor |
|
*9 |
Canister |
*10 |
Fuel Tank |
|
*11 |
Canister Pump Module |
*12 |
Canister Filter |
|
*a |
Operation A: Atmospheric Pressure Measurement |
*b |
Operation B, E: Reference Pressure Measurement |
|
*c |
Operation C: EVAP System Pressure Measurement |
*d |
Operation D: Purge VSV Monitor |
|
*e |
Atmospheric Pressure |
*f |
Negative Pressure |
-
(a) P045500: EVAP (Evaporative Emission) gross leak
In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than [second reference pressure x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large leak, illuminates the MIL and stores this DTC (2 trip detection logic).
-
(b) P045600: EVAP very small leak
In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than second reference pressure, the ECM determines that the EVAP system has a small leak, illuminates the MIL and stores this DTC (2 trip detection logic).
MONITOR STRATEGY
|
Required Sensors/Components (Main) |
Purge VSV Canister pump module |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Once per driving cycle |
|
Duration |
Within 20 minutes (varies with amount of fuel in tank) |
|
MIL Operation |
2 driving cycles |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Atmospheric pressure |
70 kPa(abs) [10.15 psi(abs)] or higher, and less than 110 kPa(abs) [15.95 psi(abs)] |
|
Battery voltage |
10.5 V or higher |
|
Vehicle speed |
Less than 4 km/h (2.5 mph) |
|
Ignition switch |
Off |
|
Time after key-off |
5, 7 or 9.5 hours |
|
Canister pressure sensor malfunction (P0452, P0453) |
Not detected |
|
Purge VSV |
Not operated by scan tool |
|
Vent valve |
Not operated by scan tool |
|
Leak detection pump |
Not operated by scan tool |
|
Both of following conditions met before-key off |
1 and 2 |
|
1. Duration that vehicle is driven |
5 minutes or more |
|
2. EVAP purge operation |
Performed |
|
Engine coolant temperature |
4.4°C (40°F) or higher, and less than 35°C (95°F) |
|
Intake air temperature |
4.4°C (40°F) or higher, and less than 35°C (95°F) |
TYPICAL MALFUNCTION THRESHOLDS
P0455: EVAP Gross Leak
|
EVAP pressure when vacuum introduction is complete |
Higher than [reference pressure x 0.2] |
P0456: EVAP Small Leak
|
EVAP pressure when vacuum introduction is complete |
Between reference pressure and [reference pressure x 0.2] |
MONITOR RESULT
Refer to EVAP system.
Click here
CONFIRMATION DRIVING PATTERN
NOTICE:
- The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes.
- Do not perform the Evaporative System Check when the fuel tank is higher than 85% 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).
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 Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream 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 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: P045500 or P045600.
-
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 battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
PROCEDURE
|
1. |
CHECK FUEL TANK CAP ASSEMBLY |
NOTICE:
- A DTC may have been detected due to a loose fuel tank cap. Check the current condition and the conditions when the DTC was output with the customer.
- If the vehicle was brought to the workshop due to DTC being output, but this DTC is not currently being output, the fuel cap may have been tightened.
(a) Check that the fuel tank cap is correctly installed.
(b) Tighten the fuel tank cap firmly (only one click sound could be heard).
|
Test Result |
Suspected Trouble Area |
Proceed to |
|---|---|---|
|
Fuel tank cap correctly installed |
- |
A |
|
Fuel tank cap loose |
Fuel tank cap improperly installed |
B |
|
Defective fuel tank cap |
- |
|
|
No fuel tank cap |
- |
C |
| A |
|
| C |
|
|
|
2. |
CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY |
HINT:
- When reinstalling the fuel tank cap, tighten it firmly (only one click sound could be head).
- When replacing the fuel tank cap, use a fuel tank cap that meets OEM specifications, and install it firmly.
| NEXT |
|
|
3. |
REPLACE FUEL TANK CAP ASSEMBLY |
HINT:
When installing the fuel tank cap, tighten it firmly (only one click sound could be head).
|
|
4. |
CLEAR DTC |
(a) Clear the DTCs.
Powertrain > Engine > Clear DTCs
(b) Turn the ignition switch off and wait for at least 30 seconds.
|
|
5. |
PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE) |
NOTICE:
- 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 85% 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).
(a) Perform the Evaporative System Check using the GTS.
Powertrain > Engine > Utility
|
Tester Display |
|---|
|
Evaporative System Check |
(b) After the Evaporative System Check is completed, check for pending DTCs.
Powertrain > Engine > Trouble Codes
HINT:
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.
| OK |
|
END |
| NG |
|
GO TO EVAP SYSTEM
|
|
|