Toyota Prius 2010 Repair Manual page 97

DTC B1423/23 is not output
NOTICE:
If the DTC was set due to an insufficient or excessive amount of refrigerant, the problem may have been solved
after performing the previous step. However, the root cause of insufficient refrigerant may be refrigerant leaks.
The root cause of excessive refrigerant may be adding refrigerant when the level was insufficient. Therefore,
identify and repair any refrigerant leaks as necessary.
B
END
A
11. INSPECT A/C PRESSURE SENSOR
(a) Install the manifold gauge set.
(b) Reconnect the A/C pressure sensor connector.
(c) Turn the power switch on (IG).
NG
REPLACE A/C PRESSURE SENSOR
2010 Toyota Prius
Result
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester
Connection
Refrigerant pressure:
L17-9 (PRE) -
Normal pressure (less than 3.187
L17-13 (SG-2)
MPa [462 psi] and more than 0.39
MPa [57 psi])
Text in Illustration
Component with harness connected
*1
(A/C Amplifier)
Proceed to
Condition
B
Specified
Condition
1.0 to 4.912 V
Repair Manual