Problem Symptoms Table [11/2023 - ]

WARNING: This page is about a different variant/trim than selected.

NOTE:

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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
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	Only Cool Air Function	Only Heater Function	Suspected Area
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 LIN communication malfunction between air conditioning amplifier assembly and No. 2 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	for Air conditioning control assembly: Refer to Operation not Accepted Even If Air Conditioning Switch is Operated [11/2023 - ] for No. 2 air conditioning control assembly: Refer to Rear Panel Switch Operation not Accepted [11/2023 - ]
Air conditioning system cannot be operated using air conditioning control assembly (Air conditioning system display operates)	Air conditioning control assembly No. 2 air conditioning control assembly	for Air conditioning control assembly: Refer to REMOVAL [10/2022 - ] for No. 2 air conditioning control assembly: Refer to REMOVAL [12/2019 - ]
Air conditioning system cannot be operated using air conditioning control assembly immediately after starting the hybrid system* (Air conditioning system display operates) (Only AUTO indicator illuminates) (A/C switch indicator does not illuminate)	Refer to "INITIALIZATION"	Refer to INITIALIZATION [11/2023 - ]
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)	Refer to A/C Switch Indicator does not Turn On [11/2023 - ]

*: If the air conditioning system cannot be operated and only the AUTO indicator illuminates for a certain amount of time after turning the ignition switch to ON (IG), the servo motor may be automatically initializing. Automatic initialization is performed when the cable is disconnected from the auxiliary battery terminal or a deviation in the servo motor position is detected.

COOLING FUNCTION

Symptom	Suspected Area	Link
Cool air is not discharged (Air is discharged)	Compressor with motor assembly 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	Refer to No Cooling at All [11/2023 - ]
Cooling effectiveness is poor Cooling response is slow	ECO mode control of air conditioning system is enabled Compressor with motor assembly malfunction Refrigerant volume (high) Refrigerant volume (low) Clogged cooler condenser assembly fins Cooling fan system malfunction Mechanical locking of damper and damper link Solar sensor (automatic light control sensor) malfunction High inlet air temperature Harness or connector	Refer to Cooling is Poor [11/2023 - ]
Temperature of outlet air is cooler on left or right side (When same temperature set for both sides)	Compressor with motor assembly malfunction Refrigerant volume (low) Mechanical locking of damper and damper link Solar sensor (automatic light control sensor) malfunction Harness or connector	Refer to Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [11/2023 - ]

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	Refer to No Heating at All [11/2023 - ]
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	Refer to Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [11/2023 - ]

BLOWER CONTROL

Symptom	Suspected Area	Link
No air flows from the registers	Air conditioning amplifier assembly malfunction Blower motor with fan sub-assembly malfunction Rear blower motor with fan sub-assembly malfunction Warm-up control Engine coolant temperature sensor malfunction Harness or connector	Refer to Blower Motor does not Operate [12/2019 - ]
Airflow volume cannot be changed	Air conditioning amplifier assembly malfunction Blower motor with fan sub-assembly malfunction Rear blower motor with fan sub-assembly malfunction Harness or connector	for Front air conditioning unit: Refer to Blower Motor Circuit [11/2023 - ] for Rear air conditioning unit: Refer to Rear Blower Motor Circuit [11/2023 - ]
Airflow volume is constantly low Airflow volume sometimes becomes low	for Front air conditioning unit: 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 for Rear air conditioning unit: ECO mode control of air conditioning system is enabled Rear blower motor with fan sub-assembly malfunction Clogged rear evaporator sub-assembly	Refer to Weak Blower Output [11/2023 - ]

Symptom

Suspected Area

Link

No air flows from the registers

Air conditioning amplifier assembly malfunction
Blower motor with fan sub-assembly malfunction
Rear blower motor with fan sub-assembly malfunction
Warm-up control
Engine coolant temperature sensor malfunction
Harness or connector

Refer to Blower Motor does not Operate [12/2019 - ]

Airflow volume cannot be changed

Air conditioning amplifier assembly malfunction
Blower motor with fan sub-assembly malfunction
Rear blower motor with fan sub-assembly malfunction
Harness or connector

for Front air conditioning unit: Refer to Blower Motor Circuit [11/2023 - ]
for Rear air conditioning unit: Refer to Rear Blower Motor Circuit [11/2023 - ]

Airflow volume is constantly low
Airflow volume sometimes becomes low

for Front air conditioning unit:

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

for Rear air conditioning unit:

ECO mode control of air conditioning system is enabled
Rear blower motor with fan sub-assembly malfunction
Clogged rear evaporator sub-assembly

Refer to Weak Blower Output [11/2023 - ]

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 conditioning pressure sensor circuit malfunction Engine coolant temperature (high)	Refer to Recirculated/Fresh Air Modes Switch without User Input [11/2023 - ]
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	Refer to Recirculated/Fresh Air Modes do not Switch [11/2023 - ]

*: except USA and Canada

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 Rear mode damper servo sub-assembly malfunction Damper link disconnection Air conditioner unit assembly malfunction	Refer to Air Vent cannot be Switched [11/2023 - ]
Air outlet mode cannot be changed (Air outlet display does not change)	Air conditioning control assembly No. 2 air conditioning control assembly	for Air conditioning control assembly: Refer to REMOVAL [10/2022 - ] for No. 2 air conditioning control assembly: Refer to REMOVAL [12/2019 - ]

DEFROSTER CONTROL

Symptom	Suspected Area	Link
Windshield frequently fogs up	Compressor with motor assembly 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	Refer to Front Window Fogging [11/2023 - ]