Tacoma

Toyota Tacoma 2015-2018 Air Conditioning Workshop Manual

*a Low Pressure Side *b High Pressure Side
SYMPTOM PROBABLE CAUSE DIAGNOSIS CORRECTIVE ACTION
Vacuum indicated on
low pressure side, and
extremely low pressure
indicated on high
pressure side
Frost or condensation
seen on piping on both
sides of condenser or
expansion valve
Refrigerant flow
obstructed by
moisture or dirt in
refrigeration
system
Refrigerant flow
obstructed by gas
leakage from
expansion valve
Refrigerant
does not
circulate
Check expansion
valve refrigerant
1.
Clean expansion
valve using
compressed air
2.
Replace condenser3.
Evacuate air and
charge system with
appropriate volume
of new refrigerant
4.
For gas leakage
from expansion
valve, replace
expansion valve
5.
(6) The A/C system does not function effectively due to the system being overcharged with refrigerant or
insufficient cooling of the condenser.
Text in Illustration
*a Low Pressure Side *b High Pressure Side
SYMPTOM PROBABLE CAUSE DIAGNOSIS CORRECTIVE ACTION
Pressure
extremely high on
both low and
high-pressure
sides
Excessive
refrigerant
Cooling
performance of
condenser
insufficient
Condenser is
dirty
Condenser fan
motor is
malfunctioning
Excessive
refrigerant
Clean condenser1.
Check condenser fan
motor operation
2.
If actions taken in 1
and 2 do not solve
problem, check amount
of refrigerant and adjust
amount of refrigerant to
appropriate amount
3.
(7) The A/C system does not function due to air in the refrigeration system.
CAUTION:
T
he low-pressure piping may be very hot and cause serious burns.
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