Toyota FJ Cruiser (GSJ 10, 15 series). Instruction — part 69
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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(b)Purge VSV stuck closed
In operation 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-g (2.25 mmHg-g)
or more, 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 sets the DTC
(2 trip detection logic).
2. PURGE FLOW MONITOR
The purge flow monitor consists of the two step monitors. The 1st monitor is conducted every time and
the 2nd monitor is activated if necessary.
EVAP Pressure when Purge VSV Stuck Closed:
Purge VSV
Vent Valve
Leak Detection
Pump
EVAP Pressure
Positive
Negative
First Reference
Pressure
Sequence
Time
10 seconds
60
seconds
10
seconds
60
seconds
Malfunction
ON: Open
OFF: Closed
OFF: Vent
ON: Closed
OK
ON
ON
ON
A
B
C
D
E
Within 15 minutes
A106059E06
OK
OK
EVAP Pressure
Vent Valve
Purge VSV
EVAP Pressure During Purge Flow Monitor:
Open
0.1 kPa-g (0.75 mmHg-g)
0.5 kPa-g (3.75 mmHg-g)
Malfunction
1st Monitor 2nd Monitor
ON (Closed)
A112640E01
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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•
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 0.5 kPa-g (3.75 mmHg-g), the ECM interprets this as the purge VSV being stuck
closed, and illuminates the MIL and sets DTC P0441 (2 trip detection logic).
Atmospheric pressure check:
In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before
and after conduction of the purge flow monitor, is measured by the ECM.
OBD II MONITOR SPECIFICATIONS
1.
Key-off Monitor
Monitor Strategy
Typical Enabling Conditions
2.
Key-off monitor sequence 1 to 8
1. Atmospheric pressure measurement
2. First reference pressure measurement
3. Vent valve stuck closed check
Required Sensors/Components
Purge VSV and canister pump module
Frequency of Operation
Once per driving cycle
Duration
Within 15 minutes (varies with fuel in tank)
MIL Operation
2 driving cycles
Sequence of Operation
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
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
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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4. Vacuum introduction
5. Purge VSV stuck closed check
6. Second reference pressure measurement
7. Leak check
8. Atmospheric pressure measurement
Typical Malfunction Thresholds
OBD II MONITOR SPECIFICATIONS
1.
Purge Flow Monitor
Monitor Strategy
Typical Enabling Conditions
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)
Purge VSV stuck open:
-
EVAP pressure when vacuum introduction complete
Higher than reference pressure x 0.2
Purge VSV stuck closed:
-
EVAP pressure change after purge VSV ON (open)
Less than 0.3 kPa-g (2.25 mmHg-g)
Required Sensors/Components
Purge VSV and canister pump module
Frequency of Operation
Once per driving cycle
Duration
Within 10 minutes
MIL Operation
2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs not present
P0011 (VVT System 1 - Advance)
P0012 (VVT System 1 - Retard)
P0021 (VVT System 2 - Advance)
P0022 (VVT System 2 - Retard)
P0100 - P0103 (MAF meter)
P0110 - P0113 (IAT sensor)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for Closed Loop)
P0171, P0172, P0174, P0175 (Fuel system)
P0300 - P0306 (Misfire)
P0335 (CKP sensor)
P0340 (CMP sensor)
P0351 - P0356 (Igniter)
P0450 - P0453 (EVAP press sensor)
P0500 (VSS)
Engine
Running
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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Typical Malfunction Thresholds
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page
).
ECT
4.4
°C (40°F) or more
IAT
4.4
°C (40°F) or more
Canister pressure sensor malfunction
Not detected
Purge VSV
Not operated by scan tool
EVAP system check
Not operated by scan tool
Battery voltage
10 V or more
Purge duty cycle
8 % or more
Both of following conditions met
Conditions 1 and 2
1. EVAP pressure change when purge operation started
Less than 0.1 kPa-g (0.75 mmHg-g)
2. EVAP pressure change during purge operation when vent valve
closed
Less than 0.5 kPa-g (3.75 mmHg-g)
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