
HEATER AND MANUAL AIR CONDITIONER –
Troubleshooting
55-5
No.
Trouble symp-
tom
Problem cause
Remedy
Refer-
ence
page
1
When the igni-
tion switch is
“ON”, the A/C
does not oper
Refrigerant leak or overfilling of refriger-
ant
Replenish the refrigerant, repair the
leak or take out some of the
refrigerant
55-6
does not oper-
ate.
A/C compressor relay is defective
Replace the A/C compressor relay
55-14
ate.
A/C compressor magnetic clutch is
defective
Replace the A/C compressor magnet
clutch
55-26
Dual pressure switch is defective
Replace the dual pressure switch
55-13
A/C switch is defective
Replace the A/C switch
55-17
Blower switch is defective
Replace the blower switch
55-17
Air thermo-sensor is defective
Replace the air thermo-sensor
55-22
Refrigerant temperature switch is defec-
tive
Replace the refrigerant temperature
switch
55-25
Automatic compressor-ECU is defective
Replace the automatic compressor-
ECU
–
2
When the A/C is
operating, tem-
perat re inside
Refrigerant leak
Replenish the refrigerant and repair
the leak
55-6
perature inside
the passenger
Dual pressure switch is defective
Replace the dual pressure switch
55-13
the passenger
compartment
doesn’t
de-
Air thermo-sensor is defective
Replace the air thermo-sensor
–
doesn t
de-
crease (cool air
is not emitted)
Condenser fan relay is defective
Replace the condenser fan relay
55-14
is not emitted).
Condenser fan motor is defective
Replace the condenser fan motor
55-29
Radiator fan relay (HI, LO) is defective
Replace the radiator fan relay (HI, LO)
55-14
Radiator fan motor is defective
Replace the radiator fan motor
–
Refrigerant temperature switch is defec-
tive
Replace the refrigerant temperature
switch
55-25
Automatic compressor-ECU is defective
Replace the automatic compressor-
ECU
–
3
Blower fan mo-
tor doesn’t turn
Blower switch is defective
Replace the blower switch
55-17
tor doesn’t turn.
Blower relay is defective
Replace the blower relay
55-13
Resistor is defective
Replace the resistor
55-21
Blower fan motor is defective
Replace the blower fan motor
55-21
4
Blower fan mo-
tor doesn’t stop
t rning
Defective harness between the blower
fan motor and the blower switch
Repair the harness
–
turning.
Blower switch is defective
Replace the blower switch
55-17
Resistor is defective
Replace the resistor
55-21
5
When the A/C is
operating
con
Condenser fan relay is defective
Replace the condenser fan relay
55-14
operating con-
denser fan or
Condenser fan motor is defective
Replace the condenser fan motor
55-29
denser
an or
radiator fan
does not run
Radiator fan relay (HI, LO) is defective
Replace the radiator fan relay (HI, LO)
55-14
does not run.
Radiator fan motor is defective
Replace the radiator fan motor
–
Dual pressure switch is defective
Replace the dual pressure switch
55-13
Engine-ECU is defective
Replace the engine-ECU
–