Suzuki RA410, Manual

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1B-4 AIR CONDITIONING (OPTIONAL)
DIAGNOSIS
GENERAL DIAGNOSIS TABLE
Condition Possible Cause Correction
Cool air does not come out
(A/C system improper
operative)
A/C system inoperative
No refrigerant
Fuse blown
A/C switch faulty
Blower fan switch faulty
A/C thermistor faulty
Dual pressure switch faulty
Wiring or grounding faulty
ECT sensor faulty
ECM and its circuit faulty
Recover, evacuation and charging.
Check “TURN” fuse, “HEATER” fuse
and check short circuit to ground.
Check A/C switch.
Check blower fan switch
Check A/C thermistor.
Check dual pressure switch.
Repair as necessary.
Check ECT sensor
Check ECM and its circuit
Compressor inoperative (dose not
rotate)
Magnet clutch faulty
Drive belt loosen or broken
Compressor faulty
Check magnet clutch.
Adjust or replace drive belt.
Check compressor.
Radiator (and condenser) cooling fan
motor inoperative
“RDTR” fuse blown
Radiator (and condenser) cooling fan
relay faulty
Wiring or grounding faulty
Radiator fan relay signal faulty
Radiator (and condenser) cooling fan
motor faulty
Replace fuse and check short circuit to
ground.
Check radiator cooling fan relay
Repair as necessary
Check radiator fan relay signal
Check radiator cooling fan motor.
Blower motor inoperative
Fuse blown
Blower resistor faulty
Blower fan switch faulty
Wiring or grounding faulty
Blower motor faulty
Check “HEATER” fuse and check short
circuit to ground.
Check blower resistor.
Check blower fan switch.
Repair as necessary.
Check blower motor.
Cool air does not come out
or insufficient cooling (A/C
system normal operative)
Insufficient or excessive charge of re-
frigerant
Condenser clogged
Evaporator clogged or frosted
A/C thermistor faulty
Expansion valve faulty
Receiver/dryer clogged
Drive belt slipping
Magnetic clutch faulty
Check charge of refrigerant.
Check system for leaks.
Check condenser.
Check evaporator and A/C thermistor.
Check A/C thermistor.
Check expansion valve.
Check receiver/dryer.
Check or replace drive belt.
Check magnetic clutch.