Toyota Camry owners & service manuals

Toyota Camry (XV70): Problem Symptoms Table

Toyota Camry Repair Manual XV70 (2018-2024) / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Manual Air Conditioning System) / Problem Symptoms Table

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

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

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