HVAC SYSTEM (HEATER, VENTILATOR AND A/C) > General Diagnostic Table

INSPECTION

Symptoms

Repair order

Blower motor

Does not operate.

Fuse

Blower motor relay

Blower motor

Blower motor resistor (Manual A/C)

Blower switch

Wiring harness

Noise

Blower motor

Compressor

Does not operate.

Refrigerant

Fuse

Air conditioning relay

Magnet clutch

Compressor

Pressure switch

A/C switch

Blower switch

Wiring harness

Noise

V-belt

Magnet clutch

Compressor

Cold air not emitted.

Refrigerant

V-belt

Magnet clutch

Compressor

Pressure switch

Aspirator hose

Blower fan relay

Blower motor

A/C switch

Blower switch

Control module

Expansion valve

Evaporator

Air mix actuator (Auto A/C)

Temperature control cable (Manual A/C)

Wiring harness

Heater duct

Heater vent duct

Warm air not emitted.

Engine coolant

Aspirator hose

Air mix actuator (Auto A/C)

Temperature control cable (Manual A/C)

Blower switch

Heater core

PTC heater (Diesel engine model)

Mini PTC heater LH (Diesel engine model)

Mini PTC heater RH (Diesel engine model)

PTC heater relay (Diesel engine model)

Temperature of air from vents does not change.

Engine coolant

Air mix actuator (Auto A/C)

Temperature control cable (Manual A/C)

Temperature control switch

Wiring harness (Auto A/C)

Unable to switch blow vents.

Mode actuator (Auto A/C)

Mode switch cable (Manual A/C)

Mode switch (Auto A/C)

Wiring harness (Auto A/C)

Unable to switch suction vents.

FRESH/RECIRC switch (Auto A/C)

Intake door actuator (Auto A/C)

Wiring harness (Auto A/C)