(a) Use a refrigerant recovery unit to recover refrigerant.
(b) Evacuate the A/C system.
(c) Add an appropriate amount of refrigerant.
If refrigerant is added and the system has not been properly evacuated (insufficient vacuum time),
moisture in the air remaining in the system will freeze in the cooler expansion valve, blocking the flow on
the high pressure side. Therefore, in order to confirm the problem, recover the refrigerant and properly
evacuate the system. Add an appropriate amount of refrigerant, and check for DTCs.
10. RECHECK FOR DTC
a) Recheck for DTCs when the following conditions are satisfied.
Vehicle Doors Fully open
Temperature Setting MAX COLD
Blower Speed HI
A/C Switch On
R/F Switch Recirculation
Interior Temperature 25 to 35°C (77 to 95°F)
Engine Speed 2000 rpm
f refrigerant pressure on the high pressure side becomes high, the DTC will be set. It is necessary to
measure the voltage for a certain amount of time (approximately 10 minutes) because the DTC may be set
after the A/C operates for a while.
When the outside air temperature is low (below -1.5°C (29.3°F)), the compressor stops due to operation of
the ambient temperature sensor and the evaporator temperature sensor to prevent the evaporator from
freezing. In this case, perform the inspection in a warm indoor environment.
RESULT PROCEED TO
DTC B1423/23 is output A
DTC B1423/23 is not output B
f 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