Toyota FJ Cruiser (GSJ 10, 15 series). Manual — part 70
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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ES
DTC SUMMARY
DTC
P0450
Evaporative Emission Control System Pressure
Sensor / Switch
DTC
P0451
Evaporative Emission Control System Pressure
Sensor Range / Performance
DTC
P0452
Evaporative Emission Control System Pressure
Sensor / Switch Low Input
DTC
P0453
Evaporative Emission Control System Pressure
Sensor / Switch High Input
DTC
Monitoring Items
Malfunction Detection Conditions
Trouble Areas
Detection
Timings
Detection
Logic
P0450
Canister pressure sensor
voltage fluctuation
abnormal
Sensor output voltage rapidly fluctuates
beyond upper and lower malfunction
thresholds for 0.5 seconds.
•
Canister pump module
•
EVAP system hose
(pipe from air inlet port
to canister pump
module, canister filter,
fuel tank vent hose)
•
ECM
•
EVAP
monitoring
(ignition OFF)
•
Ignition ON
1 trip
P0451
Canister pressure sensor
noise
Sensor output voltage fluctuates
frequently within certain time period.
•
Canister pump module
•
Connector/wire
harness
(Canister pump
module - ECM)
•
EVAP system hose
(pipe from air inlet port
to canister pump
module, canister filter,
fuel tank vent hose)
•
ECM
•
EVAP
monitoring
(ignition OFF)
•
Engine
running
2 trip
Canister pressure sensor
signal becomes fixed/flat
Sensor output voltage does not vary
within certain time period.
•
Canister pump module
•
Connector/wire
harness
(Canister pump
module - ECM)
•
EVAP system hose
(pipe from air inlet port
to canister pump
module, canister filter,
fuel tank vent hose)
•
ECM
•
EVAP
monitoring
(ignition OFF)
2 trip
P0452
Canister pressure sensor
voltage low
Sensor output voltage less than 0.45 V
for 0.5 seconds.
•
Canister pump module
•
Connector/wire
harness
(Canister pump
module - ECM)
•
EVAP system hose
(pipe from air inlet port
to canister pump
module, canister filter,
fuel tank vent hose)
•
ECM
•
Ignition ON
•
EVAP
monitoring
(ignition OFF)
1 trip
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HINT:
The canister pressure sensor is built into the canister pump module.
DESCRIPTION
The description can be found in the EVAP (Evaporative Emission) System (See page
).
MONITOR DESCRIPTION
1. DTC P0450: Canister pressure sensor voltage abnormal fluctuation
If the canister pressure sensor voltage output [pressure] rapidly fluctuates between less than 0.45 V
[42.1 kPa-a (315.9 mmHg-a)] and more than 4.9 V [123.8 kPa-a (928.4 mmHg-a)], the ECM interprets
this as an open or short circuit malfunction in the canister pressure sensor or its circuit, and stops the
EVAP (Evaporative Emission) system monitor. The ECM then illuminates the MIL and sets the DTC (1
trip detection logic).
P0453
Canister pressure sensor
voltage high
Sensor output voltage more than 4.9 V
for 0.5 seconds.
•
Canister pump module
•
Connector/wire
harness
(Canister pump
module - ECM)
•
EVAP system hose
(pipe from air inlet port
to canister pump
module, canister filter,
fuel tank vent hose)
•
ECM
•
Ignition ON
•
EVAP
monitoring
(ignition OFF)
1 trip
DTC
Monitoring Items
Malfunction Detection Conditions
Trouble Areas
Detection
Timings
Detection
Logic
Canister Pressure Sensor Specification:
Pressure
Output Voltage
4.900 V
4.150 V
1.425 V
0.450 V
Malfunction Area
Malfunction Area
Usable Range
Standard atmospheric pressure is 101.3 kPa-a (760 mmHg-a)
HINT:
110
(825)
60
(450)
kPa-a
(mmHg-a)
A115543E05
1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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ES
2. DTC P0451: Canister pressure sensor noise or fixed/flat
If the canister pressure sensor voltage output fluctuates rapidly for 10 seconds, the ECM stops the
EVAP system monitor. The ECM interprets this as noise from the canister pressure sensor, and stops
the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC.
Alternatively, if the sensor voltage output does not change for 10 seconds, the ECM interprets this as
the sensor being fixed/flat, and stops the monitor. The ECM then illuminates the MIL and sets the DTC.
(Both the malfunctions are detected by 2 trip detection logic).
3. DTC P0452: Canister pressure sensor voltage low
If the canister pressure sensor voltage output [pressure] is below 0.45 V [42.1 kPa-a (315.9 mmHg-a)],
the ECM interprets this as an open or short circuit malfunction in the canister pressure sensor or its
circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (1 trip
detection logic).
4. DTC P0453: Canister pressure sensor voltage high
If the canister pressure sensor voltage output [pressure] is 4.9 V [123.8 kPa-a (928.4 mmHg-a)] or
more, the ECM interprets this as an open or short circuit malfunction in the canister pressure sensor or
its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (1
trip detection logic).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P0451 (Noise monitor):
P0451 (Fixed/flat monitor):
P0450, P0452 and P0453:
Required Sensors/Components
Canister pump module
Frequency of Operation
Once per driving cycle: P0451 sensor fixed/flat
Continuous: P0451 sensor noise, P0450, P0452 and P0453
Duration
0.5 seconds: P0450, P0452 and P0453
Within 15 seconds: P0451
MIL Operation
Immediate: P0450, P0452 and P0453
2 driving cycles: P0451
Sequence of Operation
None
Monitor runs whenever following DTCs not present
None
Atmospheric pressure (absolute pressure)
70 to 110 kPa-a (525 to 825 mmHg-a)
Battery voltage
10.5 V or more
Intake air temperature
4.4
°to 35°C (40° to 95°F)
Canister pressure sensor malfunction (P0450, P0452, 0453)
Not detected
Either of following conditions met
A or B
A. Engine condition
Running
B. Time after key off
5 or 7 or 9.5 hours
Monitor runs whenever following DTCs not present
None
Battery voltage
10.5 V or more
Intake air temperature
4.4
°to 35°C (40° to 95°F)
Canister pressure sensor malfunction (P0450, P0452, 0453)
Not detected
Atmospheric pressure (absolute pressure)
70 to 110 kPa-a (525 to 825 mmHg-a)
Time after key off
5 or 7 or 9.5 hours
Monitor runs whenever following DTCs not present
None
Either of following conditions met
(a) or (b)
(a) Ignition switch
ON
(b) Soak timer
ON
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1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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TYPICAL MALFUNCTION THRESHOLDS
P0450: Canister pressure sensor chattering
P0451: Canister pressure sensor noise
P0451: Canister pressure sensor fixed/flat
P0452: Canister pressure sensor low voltage
P0453: Canister pressure sensor high voltage
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
•
When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle
condition. For example, do not tighten the fuel cap.
•
Do not disassemble the canister pump module.
•
An intelligent tester is required to conduct the following diagnostic troubleshooting procedure.
(a) Connect an intelligent tester to the DLC3.
(b) Turn the ignition switch ON (do not start the engine).
EVAP pressure
Less than 42.1 kPa-a (315.9 mmHg-a), or more than 123.8 kPa-a
(928.4 mmHg-a)
Frequency that EVAP pressure change 0.3 kPa-g (2.25 mmHg-g) or
more
10 times or more in 10 seconds
EVAP pressure change during reference pressure
Less than 0.65 kPa-g (4.87 mmHg-g)
EVAP pressure
Less than 42.1 kPa-a (315.9 mmHg-a)
EVAP pressure
More than 123.8 kPa-a (928.4 mmHg-a)
1
CONFIRM DTC AND EVAP PRESSURE
SGND
2
3
4
VOUT
VCC
E2
Canister Pump Module
ECM
PPMP
VC
5 V
Canister
Pressure
Sensor
L10
23
B1
22
E47
28
B1
A133419E01
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