Troubleshooting - Mitsubishi Pajero Pinin 1999 Workshop Manual

HEATER, AIR CONDITIONER AND VENTILATION

TROUBLESHOOTING

TROUBLESHOOTING PROCEDURES
Trouble symptom Problem cause
When the ignition Fuse is defective
switch is ªONº, switch is ªONº
Harness or connector is defective
the A/C does not
operate operate
A/C compressor relay is defective
A/C compressor magnetic clutch is defective
Refrigerant leak or overfilling of refrigerant
Dual pressure switch is defective
A/C switch is defective
Blower switch is defective
Air thermosensor is defective
Engine-ECU is defective
When the A/C is Refrigerant leak
operating, tem-
perature perature inside inside
the passenger Dual pressure switch is defective
compartment compartment
doesn't decrease Fan controller is defective
(cool air is not
emitted) emitted)
Air thermosensor is defective
Engine-ECU is defective
Blower fan and
Fuse is defective
motor do not turn motor do not turn
Harness or connector is defective
Blower relay is defective
Blower fan and motor are defective
Resistor (for blower motor) is defective
Blower switch is defective
±
Troubleshooting
Remedy
Replace the fuse
Repair the harness or connector
Replace the A/C compressor
relay
Replace the armature plate, rotor
or clutch coil
Replenish the refrigerant, repair
the leak or take out some of the
refrigerant
Replace the dual pressure switch
Replace the blower switch as-
sembly
Replace the blower switch as-
sembly
Replace the air thermosensor
Replace the engine-ECU
Replenish the refrigerant and
repair the leak
Replace the dual pressure switch
Replace the fan controller
Replace the air thermosensor
Replace the engine-ECU
Replace the fuse
Repair the harness or connector
Replace the blower relay
Replace the blower fan and
motor
Replace the resistor
Replace the blower switch as-
sembly
55-5
Reference
page
±
±
55-17
55-28
55-16
55-32
55-21
55-21
55-22
±
55-16
55-32
GROUP14
± Radiator
55-22
±
±
±
55-17
55-23
55-22
55-26