HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): PROBLEM SYMPTOMS TABLE; 2019 MY RAV4 HV [11/2018

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM100000001FPGR
Model Year Start: 2019	Model: RAV4 HV	Prod Date Range: [11/2018 - 02/2019]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): PROBLEM SYMPTOMS TABLE; 2019 MY RAV4 HV [11/2018 - 02/2019]

PROBLEM SYMPTOMS TABLE

NOTICE:

If the auxiliary battery voltage is low, the air conditioning system may not operate. When "High Power Consumption Partial Limit on AC/Heater Operation" is displayed on the multi-information display in the combination meter assembly, inspect the auxiliary battery, referring to On-vehicle Inspection for the charging system.
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Before replacing the hybrid vehicle control ECU assembly, refer to registration.
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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.
If the auxiliary battery voltage is low, the air conditioning system may not operate. When "High Power Consumption Partial Limit on AC/Heater Operation" is not displayed on the multi-information display in the combination meter assembly, check the Data List item "Battery Control Count (Body ECU)".
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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 operation may not be consistent with the actual problem (eg: the cooling performance of the air conditioning 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 conditioning 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 goes off when initialization has finished.
If the performance of the air conditioning is poor or there is a foul odor, check clogging in the clean air filter.

Common Function of Cooling and Heater Function				Only Air Function	Only Heater Function	Suspected Area
A/C Switch Operation	Blower Operation	Fresh/Recirculation Function	Air Outlet Charging Function	Only Air Function	Only Heater Function	Suspected Area
○	○	○	○	X	○	Refer to "COOLING FUNCTION:"
○	○	○	○	○	X	Refer to "HEATER FUNCTION:"
X	○	○	○	X	X	Refer to "DISPLAY RELATED:"
○	X	○	○	X	X	Refer to "BLOWER RELATED:"
○	○	X	○	X	X	Refer to "INTAKE RELATED:"
○	○	○	X	X	X	Refer to "AIR OUTLET RELATED:"
X	X	X	X	X	X	Air conditioning amplifier or air conditioning unit assembly is defective

DISPLAY RELATED:

Symptom	Suspected Area	Link
Operations are never accepted by the air conditioning control assembly. (With the exception of the switch indicator, everything is turned off.)	LIN communication between air conditioning amplifier assembly and air conditioning control assembly Air conditioning amplifier assembly (+B and GND circuit) Air conditioning control assembly
Operations are never accepted by the air conditioning control assembly. (LCD panel is displayed.)	Air conditioning control assembly
Operations are never accepted by the air conditioning control assembly only immediately after starting the hybrid system. (LCD panel is displayed.) (Only AUTO indicator illuminates.)	Refer to "INITIALIZATION"
A/C switch display turns off.	Air conditioning amplifier assembly A/C switch (air conditioning control assembly) Malfunction in one of the servo motors (initialization incomplete) Damper and link operation (jamming) Low ambient temperature (including thermistor assembly)

COOLING FUNCTION:

Symptom	Suspected Area	Link
No cooling at all. (Air is discharged.)	Compressor with motor assembly Refrigerant pressure Lack of refrigerant gas Dirty cooler condenser Cooling fan system malfunction Air mix damper and link operation (jamming) No. 1 cooler thermistor (determined as cold, conflicting with actual temperature) Warm air flow
Cooling is poor. Takes time to cool down.	ECO drive mode function (air flow volume is restricted due to ECO drive mode being selected) Compressor with motor assembly Excessive refrigerant Lack of refrigerant gas Dirty cooler condenser Cooling fan system malfunction Air mix damper and link operation (jamming) Automatic light control sensor Warm air flow
Different temperature for left and right air outlets. (Left and right stand-alone type.)	Compressor with motor assembly Lack of refrigerant gas Air mix damper and link operation (jamming) Automatic light control sensor

HEATER FUNCTION:

Symptom	Suspected Area	Link
No heating at all. (Airflow volume control is normal.) Air outlet temperature does not increase. (Airflow volume control is normal.)	Low engine coolant temperature Air mix damper and link operation (jamming) Warm-up control Heater core closed waterway
Different temperature for left and right air outlets. (Either left or right is warm.)	Air mix damper and link operation (jamming) Heater core closed waterway

BLOWER RELATED:

Symptom	Suspected Area	Link
Blower does not operate at all. (No air comes out.)	Blower with fan motor sub-assembly (+B and GND circuit) Control signal malfunction between air conditioning assembly and blower with fan motor sub-assembly Blower with fan motor sub-assembly Air conditioning amplifier assembly Warm-up control Water temperature sensor
Blower airflow volume cannot be changed.	Air conditioning amplifier assembly Blower with fan motor sub-assembly Air conditioning control assembly Evaporator or heater core fin clogging Clean air filter clogging
Blower airflow volume is continuously weak. Blower airflow volume is sometimes weak.	Communication signal malfunction between air conditioning assembly and blower with fan motor sub-assembly Blower with fan motor sub-assembly Air conditioning amplifier assembly Evaporator or heater core fin clogging Clean air filter clogging ECO drive mode function (air flow volume is restricted due to ECO drive mode being selected) Aspirator dropped
Airflow does not come out of certain air outlets.	Refer to "INITIALIZATION"
Airflow does not come out of certain air outlets.	Visual check of air conditioning unit (caught foreign objects, etc.)	-

INTAKE RELATED:

Symptom	Suspected Area	Link
Fresh/recirculation mode changes without permission. Fresh/recirculation mode light blinks.	Automatic function set to ON in customize setting Change in fresh air temperature Refrigerant pressure drop Pressure sensor circuit High engine coolant temperature
Fresh/recirculation mode does not change. Fresh/recirculation mode does not change automatically. Exhaust gas odor when set to recirculation.	Blower servo motor Blower damper and link operation (jamming) Foreign object jammed in door Air conditioning radiator assembly High engine coolant temperature

AIR OUTLET RELATED:

Symptom	Suspected Area	Link
Air vent cannot be changed. (Display changes)	Malfunction in one of the servo motors Mode damper and link operation (jamming) Air conditioning unit
Air vent cannot be changed. (Display does not change)	Air conditioning control assembly

DEFOGGER RELATED:

Symptom	Suspected Area	Link
Front glass fogging. (Does not cool)	Compressor with motor assembly Lack of refrigerant gas Cooler expansion valve (opened too far) Mode servo motor Mode damper and link operation (jamming)