Kia Niro: Heating, Ventilation and Air Conditioning / Troubleshooting
| Troubleshooting |
| Problem Symptoms Table |
Before replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant charge, air flow or compressor.
Use the table below to find the cause of the problem. The numbers indicate the priority of the likely causes of the problem. Check each part in order. If necessary, replace the relevant parts.
After correcting the malfunction, check the complete system to ensure that performance is satisfactory.
Standard:
|
Symptom |
Suspected Area |
|
No blower operation |
1. Blower fuse |
|
2. Blower motor |
|
|
3. PWM blower module |
|
|
4. Blower speed control switch |
|
|
5. Wire harness |
|
|
No air temperature control |
1. Engine coolant level |
|
2. Heater control assembly |
|
|
No compressor operation |
1. Refrigerant level |
|
2. A/C fuse |
|
|
3. Compressor |
|
|
4. A/C pressure transducer |
|
|
5. A/C switch |
|
|
6. Evaporator temperature sensor |
|
|
7. Wire harness |
|
|
8. Cooling fan |
|
|
9. HEV system |
|
|
Ventilated air not cold |
1. Refrigerant level |
|
2. Refrigerant pressure |
|
|
3. Compressor |
|
|
4. A/C pressure transducer |
|
|
5. Evaporator temperature sensor |
|
|
6. A/C switch |
|
|
7. Heater control assembly |
|
|
8. Wire harness |
|
|
Insufficient cooling |
1. Refrigerant level |
|
2. Compressor |
|
|
3. Condenser |
|
|
4. Expansion valve |
|
|
5. Evaporator |
|
|
6. Refrigerant lines |
|
|
7. A/C pressure transducer |
|
|
8. Heater control assembly |
|
|
No air inlet control |
1. Heater control assembly |
|
No mode control |
1. Heater control assembly |
|
2. Mode actuator |
|
|
No cooling fan operation |
1. Cooling fan fuse |
|
2. Fan motor |
|
|
3. Engine ECM |
|
|
4. Wire harness |
Specifications
Specification
Air Conditioner
Item
Specification
Compressor
Type
HES27 (Electric Scroll)
Communicatio ...
Other information:
Kia Niro 2017 (DE HEV) Service Manual: Description and operation
Description
An inverter is a device that transforms the DC voltage from the battery into
an AC voltage (115V). The inverter can power various electrical devices that consume
150W or less, including mobile phone or notebook rechargers, audio systems, and
TVs.
Inverter system ...
Kia Niro 2017 (DE HEV) Service Manual: Hybrid Control Unit (HCU) Schematic diagrams
HCU Terminal And Input/Output
Signal
Terminal Function
Connector [C133-S]
Pin No.
Description
Connected to
1
HCU ground
Chassis ground
2
HCU ground
...