Engine Switch - Toyota 2GR-FE Manual

DTC P0450
DTC P0451
DTC P0452
DTC P0453
DTC SUMMARY
DTC No. Monitoring Item
Pressure sensor
P0450 voltage abnormal
fluctuation
Pressure sensor
P0451
noising
Pressure sensor
P0451
stuck
Pressure sensor
P0452
voltage low
Pressure sensor
P0453
voltage high
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).
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
Evaporative Emission Control System Pressure
Sensor / Switch
Evaporative Emission Control System Pressure
Sensor Range / Performance
Evaporative Emission Control System Pressure
Sensor / Switch Low Input
Evaporative Emission Control System Pressure
Sensor / Switch High Input
Malfunction Detection
Condition
Sensor output voltage rapidly
fluctuates beyond upper and
lower malfunction thresholds for
0.5 seconds.
Sensor output voltage fluctuates
frequently in a certain time period.
Sensor output voltage does not
vary in a certain time period.
Sensor output voltage less than
0.45 V for 0.5 seconds.
Sensor output voltage more than
4.9V for 0.5 seconds.
Trouble Area
• Pump module
• ECM
• Pump module
• Connector / wire harness
(Pump module - ECM)
• ECM
• Pump module
• Connector / wire harness
(Pump module - ECM)
• ECM
• Pump module
• Connector / wire harness
(Pump module - ECM)
• ECM
• Pump module
• Connector / wire harness
(Pump module - ECM)
• ECM
ES–275
Detection
Detection Timing
logic
• EVAP
monitoring

(engine switch

1 trip
off)
• Engine switch
on
• EVAP
monitoring
(engine switch
2 trip
off)
• Engine switch
running
• EVAP
monitoring
2 trip
(engine switch
off)
• EVAP
monitoring
(engine switch
1 trip
off)
• Engine switch
on
• EVAP
monitoring
(engine switch
1 trip
off)
• Engine switch
on
ES