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 (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. 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.
- 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 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
- 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 |
- 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:
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:
CAUTION / NOTICE / HINT
NOTICE:
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 | |