2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES–275
ES
DTC SUMMARY
HINT:
The pressure sensor is built into the pump module.
DESCRIPTION
The circuit description can be found in the EVAP (Evaporative Emission) System (See page ES-400).
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 No. Monitoring Item
Malfunction Detection
Condition
Trouble Area Detection Timing
Detection
logic
P0450
Pressure sensor
voltage abnormal
fluctuation
Sensor output voltage rapidly
fluctuates beyond upper and
lower malfunction thresholds for
0.5 seconds.
• Pump module
•ECM
• EVAP
monitoring
(engine switch
off)
• Engine switch
on
1 trip
P0451
Pressure sensor
noising
Sensor output voltage fluctuates
frequently in a certain time period.
• Pump module
• Connector / wire harness
(Pump module - ECM)
•ECM
• EVAP
monitoring
(engine switch
off)
• Engine switch
running
2 trip
P0451
Pressure sensor
stuck
Sensor output voltage does not
vary in a certain time period.
• Pump module
• Connector / wire harness
(Pump module - ECM)
•ECM
• EVAP
monitoring
(engine switch
off)
2 trip
P0452
Pressure sensor
voltage low
Sensor output voltage less than
0.45 V for 0.5 seconds.
• Pump module
• Connector / wire harness
(Pump module - ECM)
•ECM
• EVAP
monitoring
(engine switch
off)
• Engine switch
on
1 trip
P0453
Pressure sensor
voltage high
Sensor output voltage more than
4.9V for 0.5 seconds.
• Pump module
• Connector / wire harness
(Pump module - ECM)
•ECM
• EVAP
monitoring
(engine switch
off)
• Engine switch
on
1 trip