Toyota Tundra (2015 year). Manual — part 1934
Reference pressure difference between first and
second
0.9 kPa (6.75 mmHg) or more
CONFIRMATION DRIVING PATTERN
NOTICE:
1.
Turn the ignition switch to ON and turn the Techstream on.
2.
Clear DTCs (even if no DTCs are stored, perform the clear DTC operation).
3.
Turn the ignition switch off and wait for at least 30 seconds.
4.
Turn the ignition switch to ON and turn the Techstream on [A].
5.
Enter the following menu items: Powertrain / Engine and ECT / Utility / Evaporative System Check
/ Automatic Mode.
6.
After the Evaporative System Check is completed, check for All Readiness by entering the following
menus: Powertrain / Engine and ECT / Utility / All readiness.
7.
Input the DTC: P043E, P043F, P2401, P2402 or P2419.
8.
Check the DTC judgment result [B].
TESTER
DISPLAY
DESCRIPTION
NORMAL
DTC judgment completed
System normal
ABNORMAL
DTC judgment completed
System abnormal
9.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P043E,P043F...
TESTER
DISPLAY
DESCRIPTION
INCOMPLETE
DTC judgment not completed
Perform driving pattern after confirming DTC enabling conditions
N/A
Unable to perform DTC judgment
HINT:
If the judgment result shows ABNORMAL, the system has a malfunction.
If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and
check for permanent DTCs
.
HINT:
If a permanent DTC is output, the system is malfunctioning.
If no permanent DTC is output, the system is normal.
10.
MONITOR RESULT
Refer to CHECKING MONITOR STATUS
.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P043E,P043F...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000000SWF0DAX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: 3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0441; Evaporative Emission Control System Incorrect Purge
Flow; 2015 MY Tundra [08/2014 - ]
DTC
P0441
Evaporative Emission Control System Incorrect Purge Flow
DTC SUMMARY
DTC
CODE
MONITORING
ITEM
MALFUNCTION DETECTION
CONDITION
TROUBLE AREA
DETECTION
TIMING
DETECTION
LOGIC
P0441
Purge VSV
(Vacuum
Switching Valve)
stuck open
Leak detection pump creates
negative pressure (vacuum) in EVAP
system and EVAP system pressure
measured. Reference pressure
If stabilized pressure higher than
[second reference pressure x 0.2],
ECM determines that purge VSV
stuck open.
Purge VSV
Connector/wire
harness (Purge
VSV - ECM)
ECM
Canister pump
module
Leakage from
EVAP system
While
ignition
switch off
2 trip
Purge VSV stuck
closed
After EVAP leak check performed,
purge VSV turned ON (open), and
atmospheric air introduced into EVAP
system. Reference pressure
measured at start and at end of
check.
If pressure does not return to near
atmospheric pressure, ECM
determines that purge VSV stuck
closed.
Purge VSV
Connector/wire
harness (Purge
VSV - ECM)
ECM
Canister pump
module
Leakage from
EVAP system
While
ignition
switch off
2 trip
Purge flow
(for 100 L (26.4
US gal) Fuel
Tank)
While engine running, following
conditions successively met:
Negative pressure not
created in EVAP system
when purge VSV turned
ON (open)
EVAP system pressure
change less than 0.4
kPa-g (3 mmHg-g) when
vent valve turned ON
(closed)
Atmospheric pressure
change before and after
purge flow monitor less
than 0.1 kPa-g (0.75
mmHg-g)
Purge VSV
Connector/wire
harness (Purge
VSV - ECM)
Leakage from
EVAP line (Purge
VSV - Intake
manifold)
ECM
While engine
running
2 trip
Purge flow
(for 144 L (38
US gal) Fuel
Tank)
While engine running, following
conditions successively met:
Negative pressure not
created in EVAP system
when purge VSV turned
ON (open)
EVAP system pressure
change less than 0.15
Purge VSV
Connector/wire
harness (Purge
VSV - ECM)
Leakage from
EVAP line (Purge
VSV - Intake
manifold)
While engine
running
2 trip
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0441; Evapor...
DTC
CODE
MONITORING
ITEM
MALFUNCTION DETECTION
CONDITION
TROUBLE AREA
DETECTION
TIMING
DETECTION
LOGIC
kPa-g (1.125 mmHg-g)
when vent valve turned
ON (closed)
Atmospheric pressure
change before and after
purge flow monitor less
than 0.1 kPa-g (0.75
mmHg-g)
ECM
DESCRIPTION
The description can be found in the EVAP (Evaporative Emission) System
.
INSPECTION PROCEDURE
Refer to the EVAP System
.
MONITOR DESCRIPTION
The two monitors, Key-Off and Purge Flow, are used to detect malfunctions relating to DTC P0441. The Key-Off monitor is
initiated by the ECM internal timer, known as the soak timer, 5 hours* after the ignition switch is turned off. The purge flow
monitor runs while the engine is running.
KEY-OFF MONITOR
5 hours* after the ignition switch is turned off, the leak detection pump creates negative pressure
(vacuum) in the EVAP system. The ECM monitors for leaks and actuator malfunctions based on the EVAP
pressure.
HINT:
*: If the engine coolant temperature is not below 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 below 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 turned OFF (vent) and EVAP system
pressure measured by ECM in order to register
atmospheric pressure.
If pressure in EVAP system not between 70 kPa-a
and 110 kPa-a (525 mmHg-a and 825 mmHg-a),
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*1
300
seconds*2
C
EVAP system
pressure
measurement
Vent valve turned ON (closed) to shut EVAP system.
Negative pressure (vacuum) created in EVAP
system, and EVAP system pressure 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*1*3
30
minutes*2,
*3
1.
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0441; Evapor...
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