On-Vehicle Inspection Of Expansion Valve; Removal Of Cooling Unit - Toyota HILUX 1993 Repair Manual

AIR CONDITIONING SYSTEM
COOLING UNIT
(SEE PAGE AC–7)
ON–VEHICLE INSPECTION OF EXPANSION
VALVE
1. CHECK QUANTITY OF REFRIGERANT GAS DURING
REFRIGERATION CYCLE
2. INSTALL MANIFOLD GAUGE SET
(See page AC–16)
3. RUN ENGINE
Run the engine at 2,000 rpm for at least 5 minutes.
4. CHECK EXPANSION VALVE
If the expansion valve is clogged, the low pressure read–
ing will drop to 0 kPa (0 kgf/cm2, 0 psi) otherwise it is
OK.

REMOVAL OF COOLING UNIT

1. DISCONNECT NEGATIVE CABLE FROM BATTERY
2. RECOVER REFRIGERANT FROM REFRIGERATION SYS–
TEM
3. DISCONNECT SUCTION TUBE FROM COOLING UNIT
OUTLET FITTING
4. DISCONNECT LIQUID TUBE FROM COOLING UNIT
INLET FITTING
HINT: Cap the open fittings immediately to keep mois–
ture out of the system.
5. REMOVE GROMMETS FROM INLET AND OUTLET
FITTINGS
6. REMOVE GLOVE BOX
7. DISCONNECT CONNECTOR
8. REMOVE COOLING UNIT
Remove the five screws and a nut.
– Cooling Unit
AC–25