Toyota Prius 2010 Repair Manual page 88

DTC B1423/23 Pressure Sensor Circuit
DESCRIPTION
This DTC is stored when refrigerant pressure on the high pressure side is extremely low (0.19 MPa (2.0
2
kgf/cm , 28 psi) or less) or extremely high (3.14 MPa (32.0 kgf/cm
is installed on the high pressure line. It detects refrigerant pressure to output a refrigerant pressure signal to the
A/C amplifier. The A/C amplifier converts this signal to a pressure value according to the sensor characteristics
to control the compressor.
DTC No.
Open or short in pressure sensor circuit
Refrigerant pressure on the high pressure line is extremely
B1423/23
low (0.19 MPa (2.0 kgf/cm
high (3.14 MPa (32.0 kgf/cm
WIRING DIAGRAM
2010 Toyota Prius
DTC Detection Condition
2
, 28 psi) or less) or extremely
2
, 455 psi) or more).
2
, 455 psi) or more). The A/C pressure sensor
Trouble Area
A/C pressure sensor
Harness or connector between
A/C pressure sensor and A/C
amplifier
A/C amplifier
Expansion valve (blocked,
stuck)
Condenser (blocked,
deterioration of cooling
capacity due to dirt)
Cooler dryer (moisture in the
refrigerant cycle cannot be
absorbed)
Cooling fan system (condenser
cannot be cooled down)
A/C system (leaks, blocked)
Repair Manual