Air Conditioning System Troubleshooting - Toyota Hilux Surf 1993 Owner's Manual

AC–10
Tool
Ohmmeter
Voltage meter
Air conditioning service tool set
Magnetic clutch remover
Magnetic clutch stopper
Snap ring pliers
Part Name
ND OIL6,
SUNISO No.5GS or equivalent
Problem
No cooling or warm
air
Cool air comes out
intermittently
AIR CONDITIONING SYSTEM
SPECIAL TOOLS AND EQUIPMENT
SSM (SPECIAL SERVICE MATERIALS)
07117–68040
TROUBLESHOOTING
Possible cause
Magnetic clutch does not engage
(a) A/C fuse blown
(b) Magnetic clutch faulty
(c) A/C switch faulty
(d) A/C amplifier faulty
(e) Wiring or ground faulty
(f) Refrigerant empty
(g) Heater relay faulty
(h) Pressure switch faulty
Compressor does not rotate properly
(a) Drive belt loose or broken
(b) Compressor faulty
Expansion valve faulty
Leak in system
Fusible plug on receiver blown or clogged
screen
Blower does not operate
(a) HEATER fuse blown
(b) A/C switch faulty
(c) Heater relay faulty
(d) Blower motor faulty
(e) Wiring or ground faulty
Magnetic clutch slipping
Expansion valve faulty
Wiring connection faulty
Excessive moisture in system
A/C amplifier faulty
– Troubleshooting
SST No.
To diagnosis electrical system
To diagnosis electrical system
To evacuate and charge system
07110–58011
To remove pressure plate
07112–66040
To remove and install pressure plate
07112–76060
To remove pressure plate
07114–84020
Part No.
Compressor
Replace fuse and check for
short
Check magnetic clutch
Check switch
Check amplifier
Repair as necessary
Check refrigerant volume
Check heater relay
Check pressure switch
Adjust or replace drive belt
Check compressor
Check expansion valve
Test system for leaks
Check receiver
Replace fuse and check for
short
Check switch
Check heater relay
Check blower motor
Repair as necessary
Check magnetic clutch
Check expansion valve
Repair as necessary
Evacuate and charge system
Check amplifier
Use
Use etc.
Remedy
AC–6
AC–17
AC–29
AC–31
AC–6
AC–16
AC–37
AC–29
AC–15
AC–17
AC–25
AC–23
AC–6
AC–29
AC–37
AC–37
AC–6
AC–17
AC–25
AC–6
AC–31
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