Precautions; Troubleshooting - Toyota Celica Supra 1986 Service And Repair Manual

AC·2 AIR CONDITIONING SYSTEM - Precautions, Troubleshooting
PRECAUTIONS
1. When handling refrigerant (R-12). the following JII'OC8Utions should be observed:
(a} Always wear eye protection.
(bl Keep the refrigerant container (service druml below 40'C (104' FI .
lei Do not handle refrigerant in an enclosed area whe<e there is an open flame.
(dl Discharge refrigerant slowly when purging the system.
(el Be careful that the liquid refrigerant does not get on your skin.
2. If liquid refrigerant gets in the eyes or on the skin:
(a) Do not rub the eye or skin.
( b) Wash the area with a lot of cool water.
(c) Apply clean petroleum jelly to the skin.
(d) Rush to a physician or hospital for immediate professional treatment.
(e) Do not attempt to treat yourself.
3 . When tubing:
(a) Apply a few drops of compressor oil to the seats of the O·ring fittings.
(bl Tighten the nut using two wrenches to avoid
twisting
the tube.
(c) Tighten the 0-ring fitting to the specified torque.
Tightening torque for O ·ring fittings
Fittinv
s.i.re
Torque
0.31 in. Tube
135 kg-em
110 ft· lb, 13 N·ml
0.50
in.
Tube
225 kg·cm (16 h·lb,
2:2
N ·m)
.
0.62
in.
Tube
325 kg·<m (24 ft·lb, 32 N·ml
TROUBLESHOOTING
Symptom
Ponjble causes
Chedts and
QOt'rtc:tlons.
No blower operation Blown circuit breaker
Replac:e
Defective blower motOf Check and repair
Defective heater relay Check o peration
Defective A/C cut-off relay
Ch~k
optralfon
Defective blower switch Check for short or o pen
Defective wiring conne-ction
Ch.tck and repair
No blower eonttoJ
Blown blower tes.istor Aepla~
Defective blower switch
Check for shon or open
Defective temperature
s.ensou
(in·eat sensor. Cheek for shor' or open
ambient sel't$0rl
Defective rheostat
Check for short or open
Defective power servo unit
Chtc:k operation
Defective OVV
Check operation
Defective amplifier
Check o peration
Patt
AC·9
AC·9
AC~
AC·9
AC~
AC~
AC~
AC·9
AC· 19
AC~
AC.17
AC·20