Suzuki GA413 Service Manual page 60

1B-6 AIR CONDITIONING
Symptom
Cool air won't come out
(A/C system improper op-
erative)
Cool air won't come out or
insufficient cooling (A/C
system normal operative)
DIAGNOSIS
Possible Cause
A/C system inoperative
D No refrigerant
D Fuse blown
D A/C switch faulty
D Blower fan switch faulty
D A/C thermistor faulty
D Dual pressure switch faulty
D Wiring or grounding faulty
D A/C cut signal from ECM faulty
D A/C controller faulty
Compressor inoperative (won't rota-
tion)
D Magnet clutch faulty
D Drive belt loose or broken
D Compressor faulty
D A/C cut signal from ECM faulty
D A/C controller faulty
Condenser cooling fan motor inop-
erative
D Condenser cooling fan relay faulty
D Wiring or grounding faulty
D "A/C condenser fan relay" signal from
ECM faulty
D Condenser cooling fan motor faulty
Blower motor inoperative
D Fuse blown
D Blower resistor faulty
D Blower fan switch faulty
D Wiring or grounding faulty
D Blower motor faulty
D Insufficient or excessive charge of re-
frigerant
D Condenser clogged
D Evaporator clogged or frosted
D A/C thermistor faulty
D A/C controller faulty
D Expansion valve faulty
D Receiver/dryer clogged
D Drive belt slipping
D Magnetic clutch faulty
Remedy
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.
Check magnet clutch.
Tighten or replace drive belt.
Check compressor.
Check A/C cut signal.
Check A/C controller.
Check condenser cooling fan relay.
Repair as necessary.
Check A/C condenser fan relay signal.
Check condenser cooling fan motor.
Check "HEATER" fuse and check for
short circuit.
Check blower resistor.
Check blower fan switch.
Repair as necessary.
Check blower motor.
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.