1.Connect the battery voltage and check the blower motor rotation.
2.If the blower motor does not operate well, substitute with a known-good blower motor and check for proper operation.
3.Replace the blower motor if it is proved that there is a problem with it.
1.Disconnect the negative (-) battery terminal.
2.Press the lock pin (B) and then remove the crash pad under cover (A).
3.Disconnect the blower motor connector (A) and then remove the blower motor (B) after loosening the screws.
4.Install in the reverse order of removal.
Hyundai Tucson (NX4) 2022-2025 Service Manual: Heater & A/C Control Unit (Manual)
- Component
Connector Pin Function
Pin NoConnector A (Blower)Connector B (Main)
1LowBattery (+)
2CommonISG B+
3GroundILL+ (TAIL)
4Middle LowSensor REF (+5V)
5Middle HighMode control actuator feedback
6HighTemperature control actuator feedback
7Intake actuator feedback
8Evaporator tem ...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Relay Box (Passenger Compartment)
- Dscription and Operation
ICU (Integrated Central Control Unit)
ICU (Integrated Central Control Unit) is an integrated model of smart
junction block and central gateway. It performs the function of
conventional "Smart junction block" and the function of communication
medium of "Central Ga ...