Suzuki GA413, Service Manual

Page: 60 / 1246

1B-6 AIR CONDITIONING
DIAGNOSIS
Symptom Possible Cause Remedy
Cool air won’t come out
(A/C system improper op-
erative)
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
A/C cut signal from ECM faulty
A/C controller faulty
Recover, evacuation and charging.
Check “TURN BACK” fuse, “HEATER”
fuse and “A/C FUSE” and check for
short circuit.
Check A/C switch.
Check blower fan switch.
Check A/C thermistor.
Check dual pressure switch.
Repair as necessary.
Check A/C cut signal.
Check A/C controller.
Compressor inoperative (won’t rota-
tion)
Magnet clutch faulty
Drive belt loose or broken
Compressor faulty
A/C cut signal from ECM faulty
A/C controller faulty
Check magnet clutch.
Tighten or replace drive belt.
Check compressor.
Check A/C cut signal.
Check A/C controller.
Condenser cooling fan motor inop-
erative
Condenser cooling fan relay faulty
Wiring or grounding faulty
“A/C condenser fan relay” signal from
ECM faulty
Condenser cooling fan motor faulty
Check condenser cooling fan relay.
Repair as necessary.
Check A/C condenser fan relay signal.
Check condenser 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 for
short circuit.
Check blower resistor.
Check blower fan switch.
Repair as necessary.
Check blower motor.
Cool air won’t 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
A/C controller 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.
Check A/C thermistor.
Check A/C controller.
Check A/C thermistor.
Check A/C controller.
Check expansion valve.
Check receiver/dryer.
Check or replace drive belt.
Check magnetic clutch.