HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): PROBLEM SYMPTOMS TABLE; 2018 - 2024 MY Camry [03/2017

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM10000000146B9
Model Year Start: 2018	Model: Camry	Prod Date Range: [03/2017 - ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): PROBLEM SYMPTOMS TABLE; 2018 - 2024 MY Camry [03/2017 - ]

PROBLEM SYMPTOMS TABLE

HINT:

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.

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.
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 Conditioning 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)	Air conditioning amplifier assembly Blower motor with fan sub-assembly Air conditioning control assembly
Air conditioning system cannot be operated using air conditioning control assembly	Air conditioning control assembly
Air conditioning system cannot be operated using air conditioning control assembly immediately after starting the engine (LCD display operates) (A/C switch indicator does not illuminate)	Refer to "INITIALIZATION"
A/C switch indicator does not illuminate	Air conditioning amplifier assembly Air conditioning control assembly Servo motor initialization (incomplete) Mechanical locking of damper and damper link Low detected ambient temperature (including thermistor assembly malfunction)

COOLING FUNCTION

Symptom	Suspected Area	Link
No cool air comes out (Blower control is normal)	Compressor assembly with pulley (compressor solenoid) Refrigerant pressure is extremely high or low Refrigerant volume (low) Clogged cooler condenser assembly fins Cooling fan system malfunction Mechanical locking of damper and damper link No. 1 cooler thermistor High inlet air temperature
Cooling effectiveness is poor Cooling response is slow	Compressor assembly with pulley (compressor solenoid) Refrigerant volume (high) Refrigerant volume (low) Clogged cooler condenser assembly fins Cooling fan system malfunction Mechanical locking of damper and damper link High inlet air temperature
Refrigerant pressure does not decrease even when A/C switch is off	Air conditioning amplifier assembly Blower motor with fan sub-assembly Air conditioning control assembly Clogged No. 1 evaporator sub-assembly or heater radiator unit sub-assembly fins Clogged clean air filter

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) No. 1 air conditioning radiator damper servo sub-assembly Warm-up Control Blockage in heater radiator unit sub-assembly Flow shutting valve (water by-pass hose assembly)

BLOWER CONTROL

Symptom	Suspected Area	Link
Blower motor does not operate at all (Air does not blow from registers)	Blower motor with fan sub-assembly (power source and ground circuits) Communication malfunction between air conditioning amplifier assembly and blower motor with fan sub-assembly Blower motor with fan sub-assembly Air conditioning amplifier assembly Warm-up control Engine coolant temperature sensor
Airflow volume cannot be changed	Air conditioning amplifier assembly Blower motor with fan sub-assembly Air conditioning control assembly Clogged No. 1 evaporator sub-assembly or heater radiator unit sub-assembly fins Clogged clean air filter
Airflow volume is constantly low Airflow volume sometimes becomes low	Communication malfunction between air conditioning amplifier assembly and blower motor with fan sub-assembly Blower motor with fan sub-assembly Air conditioning amplifier assembly Clogged No. 1 evaporator sub-assembly or heater radiator unit sub-assembly fins Clogged clean air filter Aspirator installation condition

AIR INLET CONTROL

Symptom	Suspected Area	Link
Air inlet mode changes between recirculation/fresh randomly Recirculation/fresh switch indicator is blinking	Change in ambient air temperature Decrease in refrigerant pressure Air conditioner pressure sensor circuit Engine coolant temperature (high)
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 Damper link disconnection Air inlet damper mechanically locked Engine coolant temperature (high) Air conditioner unit assembly

AIR OUTLET CONTROL

Symptom	Suspected Area	Link
Air outlet mode cannot be changed (air outlet display changes)	No. 1 blower damper servo sub-assembly Damper link disconnection Air conditioner unit assembly
Air outlet mode cannot be changed (air outlet display does not change)	Air conditioning control assembly

DEFROSTER CONTROL

Symptom	Suspected Area	Link
Windshield frequently fogs up (cooling is insufficient)	Compressor assembly with pulley (compressor solenoid) Refrigerant volume (low) Cooler expansion valve (opened excessively) No. 1 air conditioning radiator damper servo sub-assembly (mode) Mechanical locking of damper and damper link