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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| All functions of the A/C system do not operate. | IG power source circuit | |
| Back-up power source circuit | ||
| Air conditioning control panel circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower operation | Blower motor circuit | |
| Air conditioning control panel circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower control | Blower motor circuit | |
| Air conditioning control panel circuit | ||
| Air conditioning amplifier assembly | ||
| Air flow control: Insufficient air flow | Blower motor circuit | |
| Air conditioning amplifier assembly | ||
| Temperature control: No cool air comes out | Refrigerant volume | |
| Refrigerant pressure | ||
| Air conditioning pressure sensor circuit | ||
| Air mix damper control servo motor circuit | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Air conditioning control panel circuit | ||
| Cooler expansion valve | ||
| CAN communication system | ||
| Air conditioning amplifier assembly | ||
| No. 2 engine wire | ||
| Compressor with motor assembly | ||
| Power management control ECU | ||
| Temperature control: No warm air comes out | Air mix damper control servo motor circuit | |
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Air conditioning control panel circuit | ||
| PTC heater circuit*1 | ||
| CAN communication system | ||
| Heater radiator unit sub-assembly | ||
| Air conditioning amplifier assembly | ||
| ECM | ||
| Temperature control: Output air is warmer or cooler than the set temperature or response is slow | Refrigerant volume | |
| Refrigerant pressure | ||
| Solar sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Air mix damper control servo motor circuit | ||
| Air inlet damper control servo motor circuit | ||
| PTC heater circuit*1 | ||
| Air conditioning control panel circuit | ||
| Heater radiator unit sub-assembly | ||
| Cooler expansion valve | ||
| CAN communication system | ||
| Air conditioning amplifier assembly | ||
| No. 2 engine wire | ||
| Compressor with motor assembly | ||
| ECM | ||
| Power management control ECU | ||
| Temperature control: No temperature control (only Max. cool or Max. warm) | Air mix damper control servo motor circuit | |
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Solar sensor circuit | ||
| Air conditioning control panel circuit | ||
| Air conditioning amplifier assembly | ||
| No air inlet control | Air inlet damper control servo motor circuit | |
| Air conditioning control panel circuit | ||
| Air conditioning amplifier assembly | ||
| No air flow mode control | Air outlet damper control servo motor circuit | |
| Air conditioning control panel circuit | ||
| Air conditioning amplifier assembly | ||
| Heater performance is low (engine is stopped). | PTC heater circuit*1 | |
| Air conditioning amplifier assembly | ||
| ECO MODE switch indicator does not come on (ECO MODE switch does not operate). | ECO switch circuit | |
| Air conditioning amplifier assembly | ||
| Pollen filter mode does not operate (A/C system is operating normally). | Air inlet damper control servo motor circuit | |
| Air outlet damper control servo motor circuit | ||
| Blower motor circuit | ||
| Air conditioning control panel circuit | ||
| Air conditioning amplifier assembly | ||
| Unable to control A/C with the steering pad switch. | Steering pad switch circuit | |
| Air conditioning control panel circuit | ||
| Air conditioning amplifier assembly | ||
| Diagnostic trouble codes (DTCs) are not recorded. Set mode is cleared when power switch is off. | Back-up power source circuit | |
| Air conditioning amplifier assembly |
*1: w/ Quick Heater Assembly
| Symptom | Suspected Area | See page |
|---|---|---|
| The remote climate control system does not operate when the remote A/C switch on the key (electrical transmitter) is operated (air conditioning system is normal). | Wireless door lock control system | |
| Data List (FL Door Courtesy, FR Door Courtesy, RL Door Courtesy SW, RR Door Courtesy SW, Back Door Courtesy SW) | ||
| Data List (Hood Courtesy SW) | ||
| Data List (Start Switch1, Start Switch2) | ||
| Data List (IG SW, ACC SW) | ||
| Data List (FL Door Lock Pos, FR Door Lock Pos, RL-Door Lock Pos SW, RR-Door Lock Pos SW) | ||
| Operation check | ||
| Certification ECU (Smart key ECU assembly) | - | |
| Main body ECU (multiplex network body ECU) | ||
| Use simulation method to check | ||
| The remote climate control system does not operate even though a wireless door lock is performed when the remote A/C switch on the key (electrical transmitter) is operated (air conditioning system is normal). | Data List (FL Door Courtesy, FR Door Courtesy, RL Door Courtesy SW, RR Door Courtesy SW, Back Door Courtesy SW) | |
| Data List (Hood Courtesy SW) | ||
| Data List (Start Switch1, Start Switch2) | ||
| Data List (IG SW, ACC SW) | ||
| Data List (Stop Light Switch) | ||
| Data List (Shift Position) | ||
| Certification ECU (Smart key ECU assembly) | - | |
| Main body ECU (multiplex network body ECU) | ||
| Use simulation method to check | ||
| The remote climate control system stops operating shortly after the system starts. | Operation check | |
| Use simulation method to check | ||
| The remote climate control system starts operating by itself. | Use simulation method to check | |
| Operation check (activation control, stop control) | ||
| Certification ECU (Smart key ECU assembly) | - | |
| Main body ECU (multiplex network body ECU) | ||
| Air conditioning amplifier assembly | ||
| Power management control ECU | ||
| The remote climate control system cannot be stopped using the remote A/C switch on the key (electrical transmitter). | Customize (Stop Pre A/C) | |
| Operation check (stop control) | ||
| Certification ECU (Smart key ECU assembly) | - | |
| Main body ECU (multiplex network body ECU) | ||
| Air conditioning amplifier assembly | ||
| Power management control ECU |