Toyota 2002 Camry - Page 868

I22120
Condition: Cooling system does not function. (Sometimes it way function)
I22121
Condition: Cooling system does not function dftectively.
–HEATER & AIR CONDITIONER REFRIGERANT
55–15
2330Author: Date:
2002 CAMRY REPAIR MANUAL (RM881U)
(5) Refrigerant does not circulate
Symptom Probable cause Diagnosis Corrective Actions
 Vacuum indicated on low pres-
sure side, very low pressure indi-
cated on high pressure side
 Frost or dew seen on piping be-
fore and after receiver/ drier or ex-
pansion valve
 Refrigerant flow obstructed by
moisture or dirt in refrigerating sys-
tem
 Refrigerant flow obstructed by
gas leaked from expansion valve
Refrigerant does not circulate
(1) Check expansion valve
(2) Clean out dirt in expansion
valve by air blowing
(3) Replace condenser
(4) Evaporate air and supply prop-
er amount of new refrigerant.
(5) For gas leakage from expan-
sion valve, replace expansion
valve
(6) Refrigerant overcharged or insufficient cooling of
condenser
Symptom Probable cause Diagnosis Remedy
 Pressure too high on both low
and high pressure sides
 No sir bubbles seen through the
sight glass even when the engine
rpm is lowered
 Unable to develop sufficient per-
formance due to excessive use of
refrigerating system
 Insufficient cooling of condenser
 Excessive refrigerant in
cycle→too much refrigerant sup-
plied
 Condenser cooling
insufficient→condenser fins
clogged at cooling fan
(1) Clean condenser
(2) Check cooling fan with cooling
fan motor operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant
and supply proper amount of re-
frigerant