Diagnosis; General Diagnosis Table - MARUTI SUZUKI Maruti 800 Service Manual

1B-4 AIR CONDITIONING (OPTIONAL)

GENERAL DIAGNOSIS TABLE

Condition
Cool air won't come out
(A/C system won't
operative)
Cool air won't come out
(Compressor won't
operative (won't rotative))
Cool air won't come out
(Radiator (and condenser)
cooling fan motor won't
operative)
Cool air won't come out
(Blower motor won't
operative)

DIAGNOSIS

Possible Cause
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
Fuse blown
Compressor relay faulty
ECM faulty
Magnet clutch faulty
Drive belt loosen or broken
Compressor faulty
"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
Fuse blown
Blower resistor faulty
Blower fan switch faulty
Wiring or grounding faulty
Blower motor faulty
Correction
Recover, evacuation and charging.
Check "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.
Check "A/C" fuse and check short
circuit to ground.
Check compressor relay.
Check magnet clutch.
Adjust or replace drive belt.
Check compressor.
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.
Check "HEATER" fuse main heater
fuse and check short circuit to ground.
Check blower resistor.
Check blower fan switch.
Repair as necessary.
Check blower motor.