Suzuki WagonR+ RB310 Service Manual page 2083

1B-4 AIR CONDITIONING (OPTIONAL)
GENERAL DIAGNOSIS TABLE
Condition
Cool air does not come
out (A/C system
improper operative)
When the blower fan
switch is OFF position,
blower motor does not
operate at A/C switch is
ON
Cool air does not 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 ECT sensor faulty
D ECM faulty
Compressor inoperative (dose not
rotate)
D Magnet clutch faulty
D Drive belt loose or broken
D Compressor faulty
D ECM faulty
Radiator (and condenser), cooling
fan motor inoperative
D Fuse blown
D Radiator cooling fan relay faulty
D Wiring or grounding faulty
D Radiator cooling fan motor faulty
D ECM 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 A/C blower motor relay faulty
D Wiring or grounding faulty
D A/C switch faulty
D Insufficient or excessive charge of
refrigerant
D Condenser clogged
D Evaporator clogged or frosted
D A/C thermistor faulty
D Expansion valve faulty
D Receiver /dryer clogged
D Drive belt slipping
D Magnetic clutch faulty
Correction
Recover, evacuation and charging.
Check "IG COIL" fuse, "HEATER" fuse
and check for 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.
Check magnet clutch.
Adjust or replace drive belt.
Check compressor.
Check ECM.
Check RDTR fuse and check short
circuit to ground.
Check radiator cooling fan relay.
Repair as necessary.
Check radiator cooling fan motor.
Check ECM.
Check "HEATER" fuse and check for
short circuit to ground.
Check blower motor resistor.
Check blower fan switch.
Repair as necessary.
Check blower motor.
Check A/C blower motor relay.
Repair as necessary.
Check A/C switch.
Check charge of refrigerant.
Check system for leaks.
Check condenser.
Check evaporator and position of A/C
thermistor.
Check A/C thermistor.
Check expansion valve.
Check receiver/dryer.
Check or replace drive belt.
Check magnetic clutch.