Toyota FJ Cruiser (GSJ 10, 15 series). Manual — part 97
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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2. P2420: Vent valve stuck open (vent)
In operation C, the vent valve turns ON (closes) 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 open. The
ECM illuminates the MIL and sets the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
Required Sensors/Components
Purge VSV and canister pump module
Frequency of Operation
Once per driving cycle
Duration
Within 15 minutes (varies with amount of fuel in tank)
MIL Operation
2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs not present
None
EVAP key-off monitor runs when all of following conditions met
-
Atmospheric pressure
70 to 110 kPa-a (525 to 825 mmHg-a)
Battery voltage
10.5 V or more
Vehicle speed
Below 2.5 mph (4 km/h)
Ignition switch
OFF
Time after key off
5 or 7 or 9.5 hours
Canister pressure sensor malfunction (P0450, P0451, P0452 and
P0453)
Not detected
Purge VSV
Not operated by scan tool
Vent valve
Not operated by scan tool
EVAP Pressure when Vent Valve Stuck OFF:
Purge VSV
Vent Valve
Leak Detection
Pump
EVAP Pressure
Positive
Negative
First Reference
Pressure
Sequence
Time
10 seconds
60
seconds
60
seconds
10
seconds
Malfunction
OK
ON
ON
ON
A
B
C
D
E
OFF: Vent
OFF: Closed
ON: Open
ON: Closed
Within 15 minutes
A106067E04
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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1.
Key-off monitor sequence 1 to 8
1. Atmospheric pressure measurement
2. First reference pressure measurement
3. Vent valve stuck closed check
4. Vacuum introduction
5. Purge VSV stuck closed check
6. Second reference pressure measurement
7. Leak check
8. Atmospheric pressure measurement
TYPICAL MALFUNCTION THRESHOLDS
"Saturated" indicates that the EVAP pressure change is less than 0.286 kPa-g (2.14 mmHg-g) in 60
seconds.
P2419: Vent valve stuck closed
Leak detection pump
Not operated by scan tool
Both of following conditions met before key off
Conditions 1 and 2
1. Duration that vehicle driven
5 minutes or more
2. EVAP purge operation
Performed
ECT
4.4
° to 35°C (40° to 95°F)
IAT
4.4
°to 35°C (40° to 95°F)
Next sequence run if following condition set
-
Atmospheric pressure change
Less than 0.3 kPa-g (2.25 mmHg-g) in 1 second
Next sequence run if all of following conditions set
Condition 1, 2 and 3
1. EVAP pressure just after reference pressure measurement start
-1 kPa-g (-7.5 mmHg-g) or less
2. Reference pressure
-4.85 to -1.057 kPa-g (-36.4 to -7.93 mmHg-g)
3. Reference pressure
Saturated within 60 seconds
Next sequence run if following condition set
-
EVAP pressure change after vent valve ON (closed)
0.3 kPa-g (2.25 mmHg-g) or more
Next sequence run if following condition set
-
EVAP pressure
Saturated within 15 minutes
Next sequence run if following condition set
-
EVAP pressure change after purge VSV ON (open)
0.3 kPa-g (2.25 mmHg-g) or more
Next sequence run if all of following conditions set
Condition 1, 2, 3 and 4
1. EVAP pressure just after reference pressure
-1 kPa-g (-7.5 mmHg-g) or less
2. Reference pressure
-4.85 to -1.057 kPa-g (-36.4 to -7.93 mmHg-g)
3. Reference pressure
Saturated within 60 seconds
4. Reference pressure difference between first and second
Less than 0.7 kPa-g (5.25 mmHg-g)
Next sequence run if following condition set
-
EVAP pressure when vacuum introduction complete
Second reference pressure or less
EVAP monitor complete if following condition set
-
Atmospheric pressure difference between sequence 1 and 8
Within 0.3 kPa-g (2.25 mmHg-g)
One of following conditions set
-
EVAP pressure just after reference pressure measurement start
More than -1 kPa-g (-7.5 mmHg-g)
Reference pressure
Less than -4.85 kPa-g (-36.4 mmHg-g)
Reference pressure
-1.057 kPa-g (-7.93 mmHg-g) or more
Reference pressure
Not saturated within 60 seconds
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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P2420: Vent valve stuck open (vent)
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page
Reference pressure difference between first and second
0.7 kPa-g (5.25 mmHg-g) or more
EVAP pressure change after EVAP canister vent valve ON
Less than 0.3 kPa-g (2.25 mmHg-g)
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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DTC SUMMARY
DESCRIPTION
To ensure the accuracy of the EVAP (Evaporative Emission) monitor values, the soak timer, which is built
into the ECM, measures 5 hours (+-15 minutes) from when the ignition switch is turned OFF, before the
monitor is run. This allows the fuel to cool down, which stabilizes the EVAP pressure. When 5 hours have
elapsed, the ECM turns on.
MONITOR DESCRIPTION
5 hours after the ignition switch is turned OFF, the soak timer activates the ECM to begin the EVAP
system monitor. While the engine is running, the ECM monitors the synchronization of the soak timer and
the CPU clock. If these two are not synchronized, the ECM interprets this as a malfunction, illuminates the
MIL and sets the DTC (2 trip detection logic).
MONITOR STRATEGY
DTC
P2610
ECM / PCM Internal Engine Off Timer Perfor-
mance
DTC
Monitoring Items
Malfunction Detection
Conditions
Trouble Areas
Detection
Timings
Detection
Logic
P2610
Soak timer (built into ECM)
ECM internal malfunction
ECM
Engine
running
2 trip
Required Sensors/Components
ECM
Frequency of Operation
Once per driving cycle
IGN
EFI
EFI
Ignition Switch
AM2
IGSW
+B
MREL
ECM
Power Source IC
Main Relay Control IC
Soak Timer IC
Battery
Soak Timer Circuit:
A133428E01
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