Toyota T100 1996 Service Manual page 1979

AC−8
Condition : Does not cool
Symptom seen in
refrigeration system
S Pressure too high on low and
high pressure sides
S Pressure too low on high pres-
sure side
1996 TOYOTA T100 (RM449U)
AIR CONDITIONING
Probable cause
Internal leak in compressor
3.
(a)
(b)
3RZ−FE Engine
Magnetic clutch not engaged
Magnetic clutch engaged
5VZ−FE Engine
Magnetic clutch not engaged
Magnetic clutch engaged
If idle speed is not as specified, check idle control system.
4.
(a)
− AIR CONDITIONING SYSTEM
(9) Defective compression compressor
Diagnosis
S Compression defective
S Valve leaking or broken sliding
parts
INSPECT IDLE−UP SPEED
Warm up engine.
Inspect idle−up speed when the these conditions are es-
tablished.
Warm up engine
S
Blower speed control switch at "HI" position
S
A/C switch ON
S
Temperature control dial at "COOL" position
S
Magnetic clutch condition
INSPECT FOR LEAKAGE OF REFRIGERANT
Perform in these conditions:
Stop engine.
S
Secure good ventilation (If the gas leak detector
S
may not react to volatile gases which are not refrig-
erant, such as evaporated gasoline and exhaust
gas.)
Repeat the test 2 or 3 times.
S
Make sure that there is some refrigerant remaining
S
in the refrigeration system.
When compressor is OFF: approx. 392 − 588 kPa
2
(4 − 6 kgf/ cm
Remedy
Repair or replace compressor
Idle−up speed
−
700 ± 50 rpm
900 ± 50 rpm
−
700 ± 50 rpm
850 ± 50 rpm
, 57 − 85 psi)
I01393