Diagnosis; General; Main A/C System (Front A/C System) - Suzuki GRAND VITARA XL-7 Owner's Manual

1B-6 AIR CONDITIONING (OPTIONAL)

General

Main A/C system (front A/C system)

Condition
Cool air does not
come out (A/C system
does not operative)
Cool air does not
come out (A/C com-
pressor does not
operative (won't rota-
tive))
Cool air does not
come out (A/C con-
denser cooling fan
motor does not opera-
tive)
Cool air does not
come out (Blower
motor does not opera-
tive)

Diagnosis

Possible Cause
No refrigerant
Fuse blown
A/C switch faulty
Blower motor switch faulty
A/C evaporator temperature sensor (A/C evap-
orator thermistor) faulty
Refrigerant (dual) pressure switch faulty
Wiring or grounding faulty
A/C ON permission signal in ECM faulty
A/C controller and its circuit faulty
Magnet clutch faulty
Compressor relay faulty
Compressor relay faulty
Drive belt loose or broken
Compressor faulty
A/C ON permission signal in ECM faulty
A/C controller faulty
Condenser cooling fan motor relay faulty
Wiring or grounding faulty
A/C condenser fan motor relay signal in ECM
faulty
Condenser cooling fan motor faulty
Fuse blown
Blower motor relay faulty
Blower motor resistor faulty
Blower motor switch faulty
Wiring or grounding faulty
Blower motor faulty
Correction
Perform recover, evacuation and
charging.
Check "IG METER", "REAR DEFG"
and "A/C" fuses, and check for
short circuit to ground.
Check A/C switch.
Check blower motor switch.
Check A/C evaporator tempera-
ture sensor (A/C evaporator ther-
mistor).
Check refrigerant (dual) pressure
switch.
Repair as necessary.
Check A/C ON permission signal.
Check A/C controller and its circuit.
Check magnet clutch.
Check compressor thermal switch.
Check compressor relay.
Adjust or replace drive belt.
Check compressor.
Check A/C ON permission signal.
Check A/C controller.
Check condenser cooling fan motor
relay.
Repair as necessary.
Check A/C condenser cooling fan
motor relay signal.
Check condenser cooling fan
motor.
Check "FRONT BLOW" and
"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.