Hyundai Tucson: Controller / Heater Control Unit
1. Heater control unit
| Pin No | Connector A | Connector B |
| 1 | Driver's mode control actuator feedback | Sensor ground |
| 2 | Intake actuator feedback | ECV (-) |
| 3 | Passenger's temperature control actuator feedback | ECV (+) |
| 4 | Driver's temperature control actuator feedback | - |
| 5 | Auto defogging actuator feedback | - |
| 6 | - | FET DRAIN feedback |
| 7 | - | Blower motor (+) |
| 8 | Photo sensor (-) LEFT | Blower INH |
| 9 | Photo sensor (-) RIGHT | Blower IS |
| 10 | - | Blower PWM IN |
| 11 | DEFOG DATA | - |
| 12 | DEFOG SCK | - |
| 13 | DEFOT TEMP | Sensor (+ 5V) |
| 14 | Ambient temperature sensor (+) | FET (GATE) |
| 15 | Evaporator sensor (+) | - |
| 16 | - | Battery (+) |
| 17 | - | Ground |
| 18 | - | - |
| 19 | - | - |
| 20 | - | - |
| 21 | Driver's mode control actuator (Vent) | - |
| 22 | Driver's mode control actuator (DEF) | - |
| 23 | Intake actuator (FRE) | - |
| 24 | Intake actuator (REC) | - |
| 25 | Passenger's temperature control actuator (Cool) | IBU ACTIVE (Low) |
| 26 | Passenger's temperature control actuator (Warm) | - |
| 27 | Driver's temperature control actuator (Cool) | - |
| 28 | Driver's temperature control actuator (Warm) | - |
| 29 | Auto defogging actuator (Open) | Blower relay |
| 30 | Auto defogging actuator (Close) | LIN |
| 31 | - | IGN1 |
| 32 | - | IGN2 |
| 33 | PTC relay1 or 2 | |
| 34 | CAN FD (Low) | |
| 35 | CAN FD (High) | |
| 36 | - | |
| 37 | LOCAL CAN (High) | |
| 38 | LOCAL CAN (Low) | |
| 39 | PTC ON signal | |
| 40 | Ground |
1.Disconnect the battery (-) terminal.
2.Remove the glove box.(Refer to Body (Interior and Exterior) - "Glove Box")
3.Press the lock pin (B) and then remove the crash pad under cover (A).
4.Disconnect the blower motor connector (A).
5.Remove the heater control unit (A), after removing the screws.
6.Disconnect the heater control unit connector.
7.Install in the reverse order of removal.
• Make sure the connector is connected properly.
Heater & A/C Control Unit (DATC)
- Components
Connector Pin Function
Pin NoConnector A
1Battery (+)
2IGN2
3IGN1
4Local CAN (High)
5Local CAN (Low)
6In-car sensor (+)
7-
8Sensor ground
9ISG B+
10ILL+ (TAIL)
11-
12- ...
Other information:
Hyundai Tucson (NX4) 2022-2025 Service Manual: Fuel Sender
- Removal
1.Remove the fuel pump.(Refer to Fuel Delivery System - "Fuel Pump")
2.Disconnect the fuel sender connector (A).
3.Release the fixing hook (A) and then remove fuel sender (B) in the arrow direction.
- Installation
1.Install in the reverse order of removal. ...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Injector
- Description
Based on information from various sensors, the ECM can calculate the
fuel amount to be injected. The fuel injector is a solenoid-operated
valve and the fuel injection amount is controlled by length of injection
time.In order to improve fuel economy, improve engine performance ...
