Diagnosis; General - Suzuki Grand Vitara XL-7 Service Manual

GENERAL

Condition
Cool air won't come out
(A /C system won't
operative)
Cool air won't come out
(A /C compressor won't
operative)
Cool air won't come out
(A /C condenser fan
motor won't operative)
Cool air won't come out
(Blower motor won't
operative)
Cool air won't come out
or insufficient cooling
(A /C system normal
operative)

DIAGNOSIS

Possible Cause
D No refrigerant
D Fuse blown
D A/C switch faulty
D Blower motor switch faulty
D A/C evaporator thermistor faulty
D Dual pressure switch faulty
D Wiring or grounding faulty
D A/C ON permission signal in ECM
faulty
D A/C controller and its circuit faulty
D Magnet clutch faulty
D Compressor relay faulty
D Compressor thermal switch faulty
D Compressor drive belt loose or
broken
D Compressor faulty
D A/C ON permission signal in ECM
faulty
D A/C controller faulty
D Condenser fan motor relay faulty
D Wiring or grounding faulty
D "A/C condenser fan relay"
signal in ECM faulty
D Condenser fan motor faulty
D Fuse blown
D Blower motor relay faulty
D Blower motor resistor faulty
D Blower motor switch faulty
D Wiring or grounding faulty
D Blower motor faulty
D Insufficient or excessive charge of
refrigerant
D Refrigerant leak in system
D Condenser clogged
D A/C evaporator clogged or frosted
D A/C evaporator thermistor faulty
D A/C controller faulty
D Expansion valve faulty
D Compressor drive belt loosen or
broken
D Magnetic clutch faulty
AIR CONDITIONING (OPTIONAL) 1B-3
Correction
Recover, evacuation and charging.
Check "IG METER", "REAR DEFG",
"FRONT BLOW", "25A A/C" fuses, and
check for short circuit to ground.
Check A/C switch.
Check blower motor switch.
Check A/C evaporator thermistor.
Check dual pressure switch.
Repair as necessary.
Check ON permission signal.
Check A/C controller and its circuit.
Check magnet clutch.
Check compressor relay.
Check compressor thermal switch.
Adjust or replace compressor drive belt.
Check compressor.
Check ON permission signal.
Check A/C controller.
Check condenser cooling fan relay.
Repair as necessary.
Check A/C condenser fan relay
signal.
Check condenser fan motor.
Check "FRONT BLOW", "REAR DEFG"
fuses, and check for short circuit to
ground.
Check blower motor relay.
Check blower motor resistor.
Check blower motor switch.
Repair as necessary.
Check blower motor.
Check charge of refrigerant.
Check system for leaks.
Check condenser.
Check A/C evaporator.
Check A/C evaporator thermistor.
Check A/C controller.
Check expansion valve.
Check or replace compressor drive belt.
Check magnetic clutch.