AIR CONDITIONING SYSTEM PROBLEM SYMPTOMS TABLE
CAUTION:
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Before disconnecting the low voltage connector of the inverter with converter assembly to replace the compressor with motor assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high voltage system Click here.
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After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work Click here.
Tech Tips
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
Note
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
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*1: If an attempt is made to operate the PTC heater when the voltage of the vehicle battery has decreased, the PTC heater will not operate as the power steering system is given priority.
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*2: Even when all the inspected areas are normal, the system may not change to the driver seat control mode due to the ambient temperature, etc. Also, even if the front passenger seat is unoccupied, the system may not change to the driver seat control mode due to control conditions.
Tech Tips
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
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of the air conditioning system do not operate | IG power source circuit | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Harness or connector | - | |
| Hybrid control system | ||
| Switch operation of multi-display (for 8 Inch) or accessory meter assembly (for 12.3 Inch) is not accepted. | Navigation system (w/ Navigation System) | |
| Audio and visual system (w/o Navigation System) | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Harness or connector | - | |
| Switch operation of multi-media module receiver assembly is not accepted. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Harness or connector | - | |
| Switch operation of rear control switch is not accepted. (w/ Rear Control Switch) | Check if rear air conditioning operation was canceled from multi-display (for 8 Inch) or accessory meter assembly (for 12.3 Inch) | - |
| LIN communication circuit | ||
| Rear control switch | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower operation | Blower motor circuit | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Harness or connector | - | |
| Air flow control: No blower control | Blower motor circuit | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Harness or connector | - | |
| Temperature control: Cooling effectiveness is poor | ECO drive mode cancel | - |
| Refrigerant volume (for HFC-134a [R134a]) | ||
| Refrigerant volume (for HFO-1234yf [R1234yf]) | ||
| Refrigerant pressure (for HFC-134a [R134a]) | ||
| Refrigerant pressure (for HFO-1234yf [R1234yf]) | ||
| Cooler expansion valve | ||
| Air mix damper control servo motor circuit (for driver side upper side) | ||
| Air mix damper control servo motor circuit (for front passenger upper side) | ||
| Air mix damper control servo motor circuit (for driver side lower side) | ||
| Air mix damper control servo motor circuit (for front passenger lower side) | ||
| Air mix damper control servo motor circuit (for rear side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Glass temperature sensor circuit | ||
| Glass surroundings temperature sensor circuit | ||
| Glass humidity sensor circuit | ||
| Compressor with motor assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature control: No cool air comes out | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Refrigerant volume (for HFC-134a [R134a]) | ||
| Refrigerant volume (for HFO-1234yf [R1234yf]) | ||
| Refrigerant pressure (for HFC-134a [R134a]) | ||
| Refrigerant pressure (for HFO-1234yf [R1234yf]) | ||
| Cooler expansion valve | ||
| Air conditioning pressure sensor circuit | ||
| Air conditioning harness communication circuit | ||
| Air mix damper control servo motor circuit (for driver side upper side) | ||
| Air mix damper control servo motor circuit (for front passenger upper side) | ||
| Air mix damper control servo motor circuit (for driver side lower side) | ||
| Air mix damper control servo motor circuit (for front passenger lower side) | ||
| Air mix damper control servo motor circuit (for rear side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Glass temperature sensor circuit | ||
| Glass surroundings temperature sensor circuit | ||
| Glass humidity sensor circuit | ||
| Multi-media module receiver assembly | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Harness or connector | - | |
| Air conditioning amplifier assembly | ||
| ECM | ||
| Compressor with motor assembly | ||
| Inverter with converter assembly | ||
| Air conditioning harness | ||
| Power management control ECU | ||
| Temperature control: No warm air comes out | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Air conditioning harness communication circuit | ||
| Air mix damper control servo motor circuit (for driver side upper side) | ||
| Air mix damper control servo motor circuit (for front passenger upper side) | ||
| Air mix damper control servo motor circuit (for driver side lower side) | ||
| Air mix damper control servo motor circuit (for front passenger lower side) | ||
| Air mix damper control servo motor circuit (for rear side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Glass temperature sensor circuit | ||
| Glass surroundings temperature sensor circuit | ||
| Glass humidity sensor circuit | ||
| Heater water pump circuit | ||
| PTC heater circuit (w/ PTC Heater) | ||
| Multi-media module receiver assembly | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Harness or connector | - | |
| Air conditioning amplifier assembly | ||
| ECM | ||
| Power management control ECU | ||
| PTC heater does not operate*1 (w/ PTC Heater) | ECO drive mode cancel | - |
| Power steering system ("Battery Control Count [Body ECU]") | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| PTC heater circuit | ||
| Air conditioning amplifier assembly | ||
| Inverter with converter assembly | ||
| Harness or connector | - | |
| Power steering control ECU | ||
| ECM | ||
| Temperature control: Output air is warmer or cooler than the set temperature or response is slow | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Refrigerant volume (for HFC-134a [R134a]) | ||
| Refrigerant volume (for HFO-1234yf [R1234yf]) | ||
| Refrigerant pressure (for HFC-134a [R134a]) | ||
| Refrigerant pressure (for HFO-1234yf [R1234yf]) | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Glass temperature sensor circuit | ||
| Glass surroundings temperature sensor circuit | ||
| Glass humidity sensor circuit | ||
| Air mix damper control servo motor circuit (for driver side upper side) | ||
| Air mix damper control servo motor circuit (for front passenger upper side) | ||
| Air mix damper control servo motor circuit (for driver side lower side) | ||
| Air mix damper control servo motor circuit (for front passenger lower side) | ||
| Air mix damper control servo motor circuit (for rear side) | ||
| Multi-media module receiver assembly | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Harness or connector | - | |
| Air conditioning amplifier assembly | ||
| Temperature control: No temperature control (only LO or HI) | Room temperature sensor circuit | |
| Ambient temperature sensor circuit | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Multi-media module receiver assembly | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Harness or connector | - | |
| Air conditioning amplifier assembly | ||
| No air inlet control | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Air conditioning harness communication circuit | ||
| Air inlet damper control servo motor circuit | ||
| Exhaust gas sensor circuit (w/ Smog Ventilation Sensor) | ||
| Emission gas NOx sensor circuit (w/ Smog Ventilation Sensor) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Blower vent temperature is different on the right and left sides even though the set temperature is the same for both sides | Air mix damper control servo motor circuit (for driver side upper side) | |
| Air mix damper control servo motor circuit (for front passenger upper side) | ||
| Solar sensor circuit (for driver side) | ||
| Solar sensor circuit (for front passenger side) | ||
| Air conditioning amplifier assembly | ||
| No air flow mode control | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Air conditioning harness communication circuit | ||
| Air outlet damper control servo motor circuit (for defroster side) | ||
| Air outlet damper control servo motor circuit (for driver side) | ||
| Air outlet damper control servo motor circuit (for front passenger side) | ||
| Air outlet damper control servo motor circuit (for rear side) | ||
| Multi-media module receiver assembly | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| Harness or connector | - | |
| Air conditioning amplifier assembly | ||
| Ion generator does not operate (w/ Ion Generator) | Ion generator circuit | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Multi-media module receiver assembly | ||
| Multi-display (for 8 Inch) | ||
| Accessory meter assembly (for 12.3 Inch) | ||
| No. 1 ion generator sub-assembly | ||
| Harness or connector | - | |
| Air conditioning amplifier assembly | ||
| ECO drive mode switch (combination switch assembly) does not operate normally | ECO drive mode switch circuit | |
| Diagnostic trouble codes are not recorded. Set mode is cleared when power switch is off | Back-up power source circuit | |
| Air conditioning amplifier assembly | ||
| Save energy and air flow mode does not operate normally*2 | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Multi-media module receiver assembly | ||
| Air conditioning amplifier assembly | ||
| Seat belt warning system |