A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

Refer to Diagnosis Procedure (with Automatic A/C) or Diagnosis Procedure (with Manual A/C).

A/C system cannot be controlled.

Go to Self-diagnosis Function.

Refer to Work Flow (with Automatic A/C) or Work Flow (with Manual A/C).

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.

Refer to Diagnosis Procedure (with Automatic A/C).

Refer to Diagnosis Procedure (with Manual A/C).

Mode door motor is malfunctioning.

Discharge air temperature does not change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.

Refer to Diagnosis Procedure (Automatic A/C driver side) or Diagnosis Procedure (Manual A/C driver side).

Refer to Diagnosis Procedure (Automatic A/C passenger side) or Diagnosis Procedure (Manual A/C passenger side).

Air mix door motor is malfunctioning.

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.

Refer to Diagnosis Procedure (with Automatic A/C) or Diagnosis Procedure (with Manual A/C).

Intake door motor is malfunctioning.

Blower motor operation is malfunctioning.

Go to Trouble Diagnosis Procedure for Blower Motor.

Refer to Diagnosis Procedure (with Automatic A/C) or Diagnosis Procedure (with Manual A/C).

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

Refer to Diagnosis Procedure (with Automatic A/C) or Diagnosis Procedure (with Manual A/C).

Insufficient cooling.

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

Refer to Diagnosis Procedure (with Automatic A/C) or Component Function Check (with Manual A/C).

Insufficient heating.

Go to Trouble Diagnosis Procedure for Insufficient Heating.

Refer to Diagnosis Procedure (with Automatic A/C) or Component Function Check (with Manual A/C).

Noise.

Go to Trouble Diagnosis Procedure for Noise.

Refer to Symptom Table.

A/C switch LED does not illuminate.

Go to Trouble Diagnosis Procedure for A/C System.

Refer to Diagnosis Procedure (with Automatic A/C) or Diagnosis Procedure (with Manual A/C).

Mode button LED(s) does not illuminate.

Go to Trouble Diagnosis Procedure for A/C System.

Refer to Diagnosis Procedure (with Automatic A/C) or Diagnosis Procedure (with Manual A/C).

Both high- and low-pressure sides are too high.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

Refer to Trouble Diagnosis For Unusual Pressure.

High-pressure side is too high and low-pressure side is too low.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

Refer to Trouble Diagnosis For Unusual Pressure.

High-pressure side is too low and low-pressure side is too high.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

Refer to Trouble Diagnosis For Unusual Pressure.

Both high- and low-pressure sides are too low.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

Refer to Trouble Diagnosis For Unusual Pressure.

Low-pressure side sometimes becomes negative.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

Refer to Trouble Diagnosis For Unusual Pressure.

Low-pressure side becomes negative.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

Refer to Trouble Diagnosis For Unusual Pressure.

Both high and low pressure sides are too high.

The pressure returns to normal soon after sprinkling water on condenser.

Overfilled refrigerant.

Collect all refrigerant, evacuate refrigerant cycle again, and then refill it with the specified amount of refrigerant.

Air flow to condenser is insufficient.

Insufficient condenser cooling performance.

• Poor fan rotation of radiator and condenser.

• Improper installation of air guide.

• Clogged or dirty condenser fins.

• Repair or replace malfunctioning parts.

• Clean and repair condenser fins.

When A/C compressor is stopped, a high-pressure reading quickly drops by approximately 196 kPa (2 kg/cm², 28 psi). It then gradually decreases.

Air mixed in refrigerant cycle.

Collect all refrigerant, evacuate refrigerant cycle again, and then refill it with the specified amount of refrigerant.

• Low-pressure pipe is cooler than the outlet of evaporator.

• Low-pressure pipe is frosted.

Expansion valve opened too much (excessive flow of refrigerant).

Replace expansion valve.

High-pressure side is excessively high and low-pressure side is too low.

High-pressure pipe and upper side of condenser become hot, however, liquid tank does not become so hot.

Clogged or crushed high-pressure pipe located between A/C compressor and condenser.

Repair or replace the malfunctioning parts.

High-pressure side is too low and low-pressure side is too high.

• The readings of both sides become equal soon after A/C compressor operation stops.

• There is no temperature difference between high- and low-pressure sides.

Malfunction in A/C compressor system (insufficient A/C compressor pressure operation).

• Damage or breakage of valve.

• Malfunctioning gaskets.

Replace A/C compressor.

Both high and low pressure sides are too low.

• The area around evaporator outlet does not become cold.

• The area around evaporator inlet becomes frosted.

Clogged expansion valve.

• Breakage of temperature sensor.

• Clogging by foreign material.

Eliminate foreign material from expansion valve or replace it.

• There is a temperature difference between the areas around outlet and inlet pipes of liquid tank.

• Liquid tank becomes frosted.

Malfunction in inner liquid tank (clogged strainer).

Replace liquid tank.

Evaporator becomes frosted.

Clogged or crushed low-pressure pipe.

Repair or replace malfunctioning parts.

Malfunction in intake air temperature sensor.

Check intake sensor system. Refer to Diagnosis Procedure (automatic A/C) or Component Inspection (manual A/C).

There is a small temperature difference between the high and low pressure pipes for refrigerant cycle.

• Shortage of refrigerant.

• Leakage of refrigerant.

• Check for leakage.

• Collect all refrigerant, evacuate refrigerant cycle again, and then refill it with the specified amount of refrigerant.

Low-pressure side sometimes becomes negative.

• Sometimes the area around evaporator outlet does not become cold.

• Sometimes the area around evaporator inlet is frosted.

• Icing caused by the mixing of water in cooler cycle.

• Deteriorated dryer in liquid tank.

• Collect all refrigerant.

• Evacuate refrigerant cycle completely, and then refill it with the specified amount of refrigerant. At this time, always replace liquid tank.

Hunting in high-pressure side.

There is no temperature difference between high- and low-pressure sides.

Malfunctioning variable valve in A/C compressor.

• Replace A/C compressor.

• Check ECV system.

Unusual noise from A/C compressor when A/C is ON.

Inside of A/C compressor

Wear, breakage or clogging of foreign material in inner parts.

Check A/C compressor oil. Refer to Inspection.

Magnet clutch

Contact of clutch disc with pulley.

Check clearance between clutch disc and pulley.

A/C compressor body

Loosened A/C compressor mounting bolts.

Check bolts for tightness. Refer to Exploded View.

Unusual noise from cooler piping.

Cooler piping (pipe and flexible hose)

Improper installation of clip and bracket.

Check the installation condition of the cooler piping. Refer to Exploded View.

Unusual noise from expansion valve when A/C is ON.

Expansion valve

Shortage of refrigerant.

• Check for leakage.

• Collect all refrigerant, evacuate refrigerant cycle again, and then refill it with the specified amount of refrigerant.

Wear, breakage or clogging of foreign material in inner parts.

Eliminate foreign material from expansion valve or replace it.

Unusual noise from belt.

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Loosened belt

Check belt tension. Refer to Inspection.

Internal A/C compressor parts get locked

Replace A/C compressor. Refer to Removal and Installation.