HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for Gasoline Model) PROBLEM SYMPTOMS TABLE
- NOTICE:
- ·
Perform the inspection when the vehicle is at ambient temperature. If this is not done, there could be a risk of injury depending on the location being inspected.
·Inspect the fuses and relays related to this system before inspecting the suspected areas below.
·Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
·w/ S-FLOW Control:
If no air is blowing from the rear seat registers even when the air conditioning is set to ON, it is possible that the rear seat mode servo is closed due to S-FLOW control.
VEHICLE CHECK ITEMS
- HINT:
- ·
You can reduce the number of systems to check by using the results of the following operation check.
·Perform the following checks based on Customer Feedback and the vehicle condition.
·The customer's opinion may not be consistent with the actual problem (eg: the cooling performance of the air conditioner is bad → actually, the wind volume is weak). It is important to check the problem symptoms accurately and judge correctly based on various sources of information.
·Judgment as to whether the air conditioner panel is normal or abnormal can be judged by checking if the indicator illuminates or turns off when the switch is operated.
·During servo motor initialization, the AUTO indicator light comes on, and then turns off when initialization has finished.
·If the performance of the air conditioner is poor or there is a foul odor, check for clogging in the clean air filter.
- Malfunction Operation/Function:
Common Function of Cool and Heater Function Only Cool Air Function Only Heater Function Suspected Area A/C Switch Operation Blower Operation Recirculation/Fresh Function Air Outlet Changing Function x o o o x x Go to "Problem Symptoms Table: Air Conditioning Control" o o o o x o Go to "Problem Symptoms Table: Cooling Function" o o o o o x Go to "Problem Symptoms Table: Heater Function" o x o o x x Go to "Problem Symptoms Table: Blower Control" o o x o x x Go to "Problem Symptoms Table: Air Inlet Control" o o o x x x Go to "Problem Symptoms Table: Air Outlet Control" x x x x x x Air Conditioning Amplifier Assembly or Air Conditioner Unit Assembly is Defective
AIR CONDITIONING CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
| Air conditioning system cannot be operated using air conditioning control assembly
(With the exception of the switch indicators, no inputs are reflected when other switches operated) |
·
LIN communication malfunction between air conditioning amplifier assembly and air conditioning control assembly ·
Short to +B or ground in air conditioning amplifier assembly circuit ·
Air conditioning amplifier assembly malfunction ·
Air conditioning control assembly malfunction ·
Harness or connector |
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| Air conditioning system cannot be operated using air conditioning control assembly
(Air conditioning system display operates) |
·
Air conditioning control assembly |
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| Air conditioning system cannot be operated using air conditioning control assembly immediately after starting the engine
(Air conditioning system display operates) (Only AUTO indicator illuminates) (A/C switch indicator does not illuminate) |
·
Refer to "INITIALIZATION" |
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| A/C switch indicator does not illuminate | ·
Air conditioning amplifier assembly malfunction ·
Air conditioning control assembly malfunction ·
A/C switch malfunction ·
A/C switch indicator malfunction (including when indicator turned off without switch operation) ·
Servo motor initialization (incomplete) ·
Mechanical locking of damper and damper link ·
Refrigerant pressure is extremely low ·
Low detected ambient temperature (including thermistor assembly malfunction) |
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COOLING FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
| Cool air is not discharged
(Air is discharged) |
·
Compressor assembly with pulley malfunction ·
Refrigerant pressure malfunction ·
Lack of refrigerant gas ·
Dirty cooler condenser ·
Cooling fan system malfunction ·
Air mix damper and link operation (jamming) ·
Evaporator temperature sensor (determined as cold, but conflicts with actual temperature) ·
Warm air flow |
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·
Cooling effectiveness is poor ·
Cooling response is slow |
·
ECO mode control of air conditioning system is enabled ·
Compressor assembly with pulley malfunction ·
Refrigerant volume (high) ·
Refrigerant volume (low) ·
Clogged cooler condenser assembly fins ·
Cooling fan system malfunction ·
Mechanical locking of damper and damper link ·
Automatic light control sensor malfunction ·
High inlet air temperature ·
Harness or connector |
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| Temperature of outlet air is cooler on left or right side
(When same temperature set for both sides) |
·
Compressor assembly with pulley malfunction ·
Refrigerant volume (low) ·
Mechanical locking of damper and damper link ·
Automatic light control sensor malfunction ·
Harness or connector |
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| PM2.5 concentration level is not correctly displayed
(level does not change) |
·
Air conditioning control assembly ·
Clogged clean air filter ·
Air conditioning particulate matter sensor (Air conditioning duct sub-assembly) |
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HEATER FUNCTION
| Symptom | Suspected Area | Link |
|---|---|---|
·
No warm air comes out (Blower control is normal) ·
Outlet air temperature does not increase (Blower control is normal) |
·
Engine coolant temperature (low) ·
Refrigerant volume (low) ·
Air mix damper and link operation (jamming) ·
Warm-up control ·
Blockage in heater radiator unit sub-assembly ·
Heater radiator unit sub-assembly malfunction ·
Flow shutting valve (water by-pass hose assembly) malfunction |
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| Temperature of outlet air is warmer on left or right side
(When same temperature set for both sides) |
·
Mechanical locking of damper and damper link ·
Blockage in heater radiator unit sub-assembly ·
Harness or connector |
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BLOWER CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
| No air flows from the registers | ·
Air conditioning amplifier assembly malfunction ·
Blower motor with fan sub-assembly malfunction ·
Warm-up control ·
Engine coolant temperature sensor malfunction ·
Harness or connector |
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| Airflow volume cannot be changed | ·
Air conditioning amplifier assembly malfunction ·
Blower motor with fan sub-assembly malfunction ·
Harness or connector |
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|
·
Airflow volume is constantly low ·
Airflow volume sometimes becomes low |
·
ECO mode control of air conditioning system is enabled ·
Blower motor with fan sub-assembly malfunction ·
Clogged clean air filter ·
Clogged No. 1 cooler evaporator sub-assembly or heater radiator unit sub-assembly fins ·
Evaporator temp. sensor (No. 1 cooler thermistor) ·
Aspirator pipe not connected properly |
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AIR INLET CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
·
Recirculation/fresh mode changes without permission ·
Recirculation/fresh mode light blinks |
·
Customize setting ·
Change in ambient air temperature ·
Decrease in refrigerant pressure ·
Air conditioner pressure sensor circuit malfunction ·
Engine coolant temperature (high) |
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·
Air inlet mode cannot be changed between recirculation/fresh ·
Exhaust gas odors can be smelled when air inlet mode set to recirculation mode |
·
No. 1 blower damper servo sub-assembly malfunction ·
Damper link disconnection ·
Air inlet damper mechanically locked ·
Engine coolant temperature (high) ·
Air conditioner unit assembly malfunction |
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AIR OUTLET CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
| Air outlet mode cannot be changed
(Air outlet display changes) |
·
No. 1 air conditioning radiator damper servo sub-assembly malfunction ·
No. 2 air conditioning radiator damper servo sub-assembly malfunction ·
Damper link disconnection ·
Air conditioner unit assembly malfunction |
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| Air outlet mode cannot be changed
(Air outlet display does not change) |
·
Air conditioning control assembly |
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DEFROSTER CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
| Windshield frequently fogs up | ·
Compressor assembly with pulley malfunction ·
Refrigerant volume (low) ·
Cooler expansion valve (opened excessively) ·
No. 1 air conditioning radiator damper servo sub-assembly malfunction ·
Mechanical locking of damper and damper link |
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