Rear Heater Hyundai Santa Fe III

Scheme 68

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

Scheme 75

1. Disconnect the negative (-) battery terminal.
2. Recover the refrigerant with a recover/recycling/charging station.
3. When the engine is cool, drain the engine coolant from the radiator.
4. Remove the rear luggage side trim. Refer to «LUGGAGE SIDE TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
5. Loosen the refrigerant line mounting nuts, and then remove the rear refrigerant line (A).
6. Loosen the air duct mounting screw, and then remove the air duct.
7. Loosen the refrigerant line mounting bolts, and then remove the rear refrigerant line bracket (A).
8. Remove the heater core cover, and then disconnect the heater hose.
9. Remove the rear heater unit after loosening the mounting bolts and nuts.
10. Remove the heater core (A), after loosening the mounting screw.
11. Remove the evaporator core cover (A), after removing the mounting screws.
12. Remove the evaporator core (B).
13. Install in the reverse order of removal.

Scheme 76

1. Disconnect the negative (-) battery terminal.
2. Remove the rear luggage side trim. Refer to «LUGGAGE SIDE TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
3. Disconnect the connector (A) of the blower motor.
4. Remove the blower motor (B) after loosening the mounting screws.
5. Install in the reverse order of removal.

Description

The heater unit includes mode control actuator and temperature control actuator.

The temperature control actuator is located at the heater unit. It regulates the temperature by the procedure as follows.

Signal from control unit adjusts the position of the temperature door by operating the temperature switch. Then the temperature will be regulated by the hot/cold air ratio decided by the position of the temperature door.

Scheme 77

1. Turn the ignition switch OFF.
2. Disconnect the temperature control actuator connector.
3. Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 7. Verify that the temperature control actuator operates to the warm position when connected in reverse.
4. Connect the temperature control actuator connector.
5. Turn the ignition switch ON.
6. Check the voltage between terminal 5 and 6. VOLTAGE SPECIFICATION Door Position Voltage (V) Error Detecting Max. cooling 0.3±0.15 Low voltage: 0.1V or less Max. heating 4.7±0.15 High voltage: 4.9V or less It will feedback the current position of the actuator to controls.
7. If the measured voltage is not within specification, substitute with a known-good temperature control actuator and check for proper operation.
8. Replace the temperature control actuator if it is proved that there is a problem with it.

Scheme 78

1. Disconnect the negative (-) battery terminal.
2. Remove the rear luggage side trim. Refer to «LUGGAGE SIDE TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
3. Loosen the mounting screw and then remove the temperature control actuator (A).
4. Install in the reverse order of removal.

Scheme 79

1. Turn the ignition switch OFF.
2. Disconnect the mode control actuator connector.
3. Verify that the mode control actuator operates to the vent mode when connecting 12V to terminal 3 and grounding terminal 7. Verify that the temperature control actuator operates to the warm position when connected in reverse.
4. Connect the mode control actuator connector.
5. Turn the ignition switch ON.
6. Check the voltage between terminal 5 and 4. VOLTAGE SPECIFICATION Door Position Voltage (V) Error Detecting Floor 4.7±0.15 Low voltage: 0.1V or less Vent 0.3±0.15 High voltage: 4.9V or less It will feedback the current position of the actuator to controls.
7. If the measured voltage is not within specification, substitute with a known-good mode control actuator and check for proper operation.
8. Replace the mode control actuator if it is proved that there is a problem with it.

Scheme 80

1. Disconnect the negative (-) battery terminal.
2. Remove the rear luggage side trim. Refer to «LUGGAGE SIDE TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
3. Disconnect the mode control actuator connector.
4. Loosen the mounting screws and then remove the mode control actuator (A).
5. Install in the reverse order of removal.

Scheme 81

1. Turn the ignition switch ON.
2. Manually operate the control switch and measure the voltage of the blower motor.
3. Select the control switch to raise the voltage until it reaches high speed. VOLTAGE SPECIFICATION Fan Motor Voltage Manual First speed 3.8 ± 0.5V Second speed 5.0 ± 0.5V Third speed 6.2 ± 0.5V Fourth speed 7.4 ± 0.5V Fifth speed 8.6 ± 0.5V Sixth speed 9.8 ± 0.5V Seventh speed 11.0 ± 0.5V Eighth speed Battery (+)
4. If the measured voltage is not within specification, substitute with a known-good power mosfet and check for proper operation.
5. Replace the power mosfet if it is proved that there is a problem with it.

Scheme 82

1. Disconnect the negative (-) battery terminal.
2. Remove luggage side trim.
3. Disconnect the power mosfet connector.
4. Remove the power mosfet (A) after loosening the mounting screws.
5. Install in the reverse order of removal.

Scheme 83

Connector Pin Function

Replacement

1. Disconnect the negative (-) battery terminal.
2. Remove the rear luggage side trim. Refer to «LUGGAGE SIDE TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
3. Remove the rear heater and A/C controller from the luggage side trim by loosening the mounting screws.

Scheme 84

See also:
• LUGGAGE SIDE TRIM