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 | Link |
|---|---|---|
| All functions of the air conditioning system do not operate. | IG power source circuit | |
| Back-up power source circuit | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Air conditioning amplifier assembly | ||
| Integration control and panel assembly | ||
| Bad reaction of the control panel | Control panel cleaning | - |
| Control panel customize (switch response time) | ||
| Integration control and panel assembly | ||
| It does not accept the switch operation | "BATTERY COOLING MODE CLIMATE CONTROL LIMITED TO AUTO 72" message does not display on the display in integration control and panel assembly | - |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Air conditioning amplifier assembly | ||
| Integration control and panel assembly | ||
| While the control panel is black screen (not displayed on the screen) | Integration control and panel assembly power source | |
| Air flow control: No blower operation. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Blower motor circuit | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| Air flow control: No blower control. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Blower motor circuit | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature control: Cooling effectiveness is poor. | "BATTERY COOLING MODE CLIMATE CONTROL LIMITED TO AUTO 72" message does not display on the display in Integration control and panel assembly | - |
| Refrigerant gas volume check using the GTS | ||
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Cooler expansion valve | ||
| Compressor with motor assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature control: No cool air comes out. | "BATTERY COOLING MODE CLIMATE CONTROL LIMITED TO AUTO 72" message does not display on the display in Integration control and panel assembly | - |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Refrigerant gas volume check using the GTS | ||
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Air conditioner pressure sensor circuit | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Cooler expansion valve | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (for front passenger side air mix) | ||
| Air conditioning harness assembly | ||
| No. 3 motor wire | ||
| Compressor with motor assembly | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| EV control ECU | ||
| Inverter with converter assembly | ||
| Temperature control: No warm air comes out. | "BATTERY COOLING MODE CLIMATE CONTROL LIMITED TO AUTO 72" message does not display on the display in Integration control and panel assembly | - |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Evaporator temperature sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Water temperature sensor circuit | ||
| Heater water pump circuit | ||
| Electric water heater circuit | ||
| PTC heater circuit | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (for front passenger side air mix) | ||
| Air conditioning harness assembly | ||
| Heater radiator unit sub-assembly | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| EV control ECU | ||
| Temperature control: Output air is warmer or cooler than the set temperature or response is slow. | "BATTERY COOLING MODE CLIMATE CONTROL LIMITED TO AUTO 72" message does not display on the display in Integration control and panel assembly | - |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Refrigerant gas volume check using the GTS | ||
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Automatic light control sensor circuit | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Water temperature sensor circuit | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front passenger side) | ||
| Air inlet damper control servo motor circuit | ||
| PTC heater circuit | ||
| 3 way valve circuit | ||
| Electric water heater circuit | ||
| Heater water pump circuit | ||
| Heater radiator unit sub-assembly | ||
| Cooler expansion valve | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (for front passenger side air mix) | ||
| No. 1 blower damper servo sub-assembly (fresh/recirculation damper) | ||
| Air conditioning harness assembly | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| EV control ECU | ||
| Temperature control: Output air temperature is different between left and right registers (the set temperature is the same for both) | Refrigerant shortage check using the GTS | |
| Refrigerant volume | ||
| Refrigerant pressure | ||
| Automatic light control sensor circuit | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front passenger side) | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (for front passenger side air mix) | ||
| Air conditioning harness assembly | ||
| Air conditioning amplifier assembly | ||
| Temperature control: No temperature control. (only Max. cool or Max. hot) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Room temperature sensor circuit | ||
| Ambient temperature sensor circuit | ||
| Evaporator temperature sensor circuit | ||
| Automatic light control sensor circuit | ||
| Air mix damper control servo motor circuit (for driver side) | ||
| Air mix damper control servo motor circuit (for front Passenger side) | ||
| No. 2 air conditioning radiator damper servo sub-assembly (for driver side air mix) | ||
| No. 3 air conditioning radiator damper servo sub-assembly (for front passenger side air mix) | ||
| Air conditioning harness assembly | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| No air inlet control. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Air inlet damper control servo motor circuit | ||
| No. 1 air conditioning radiator damper servo sub-assembly (for mode switching) | ||
| Air conditioning harness assembly | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| No air flow mode control. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Air outlet damper control servo motor circuit | ||
| No. 1 blower damper servo sub-assembly (fresh/recirculation damper) | ||
| Air conditioning harness assembly | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| Quick heater assembly does not operate. | PTC heater circuit | |
| Air conditioning amplifier assembly | ||
| EV control ECU | ||
| Integration control and panel assembly (ECO mode switch) does not operate normally. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| Integration control and panel assembly (ECO switch) does not operate normally. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Integration control and panel assembly | ||
| Air conditioning amplifier assembly | ||
| Rear blower motor does not operate normally. | Rear Blower Motor Circuit | |
| 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 |