Hyundai Palisade: Heater / Temperature Control Actuator

Hyundai Palisade (LX2) 2020-2025 Service Manual / Heating,Ventilation And Air Conditioning / Heater / Temperature Control Actuator

Description and operation

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.

Components and components location

Component Location

Hyundai Palisade. Components and components location

1. Temperature control actuator [LH]

2. Temperature control actuator [RH]

Repair procedures

Inspection

1.	Turn the ignition switch OFF.

2.	Disconnect the temperature control actuator connector.

Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 4.

Verify that the temperature control actuator operates to the warm position when connected in reverse.

[Driver]

Hyundai Palisade. Repair procedures

1. -
2. -
3. Coll position
4. Warm position

5. Sensor ground
6. Feedback signal
7. Sensor power (+5V)

[Passenger]

1. -
2. -
3. Coll position
4. Warm position

5. Sensor power (+5V)
6. Feedback signal
7. Sensor ground

4.	Connect the temperature control actuator connector.

5.	Turn the ignition switch ON.

Check the voltage between terminal 5 and 6.

Specification

Door Position	Voltage (V)	Error Detecting
Max. cooling	0.3 ± 0.15	Low voltage : 0.1V or less High voltage : 4.9V or less
Max. heating	4.5 ± 0.15	Low voltage : 0.1V or less 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.

Replacement

[LH, Driver]

1.	Disconnect the negative (-) battery terminal.

2.	Remove the crash pad lower panel. (Refer to Body - "Crash Pad Lower Panel")

3.	Loosen the mounting screws and remove the shower duct [LH] (A).

4.	Separate the Surround view monitoring (SVM) unit. (Refer to Body Electrical System - "SVM Unit")

5.	Separate the temperature control actuator connector (A) and loosen the mounting screw and remove the temperature control actuator (B).

6.	Install in the reverse order of removal.

[RH, Passenger]

1.	Disconnect the negative (-) battery terminal.

2.	Remove the crash pad center panel. (Refer to Body - "Crash Pad Center Panel")

3.	Loosen the mounting screws and remove the shower duct [RH] (A).

4.	Separate the temperature control actuator connector (A) and loosen the mounting screw and remove the temperature control actuator (B).

5.	Install in the reverse order of removal.

PTC Heater (Diesel only)

Description and operation Description The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of the heater core...

Mode Control Actuator

Description and operation Description The mode control actuator is located at the heater unit. It adjusts the position of the mode door by operating the mode control actuator based on the signal of the A/C control unit...

Other information:

Hyundai Palisade (LX2) 2020-2025 Owner's Manual: Engine coolant temperature gauge

■ Type A and B ■ Type C This gauge indicates the temperature of the engine coolant when the ignition switch is in the ON position. NOTICE If the gauge pointer moves beyond the normal range area toward the "H" position, it indicates overheating that may damage the engine...

Hyundai Palisade (LX2) 2020-2025 Service Manual: Troubleshooting

Trouble Symptom Charts Trouble Symptom 1 Trouble Symptom 2 Trouble symptom Probable cause Remedy The set vehicle speed varies greatly upward or downward "Surging" (repeated alternating acceleration and deceleration) occurs after setting Malfunction of the vehicle speed sensor circuit Repair the vehicle speed sensor system, or replace the part Malfunction of ECM Check input and output signals at ECM Trouble Symptom 3 Trouble symptom Probable cause Remedy The CC system is not canceled when the brake pedal is depressed Damaged or disconnected wiring of the brake pedal switch Repair the harness or replace the brake pedal switch Malfunction of the ECM signals Check input and output signals at ECM Trouble Symptom 4 Trouble symptom Probable cause Remedy The CC system is not canceled when the shift lever is moved to the "N" position (It is canceled, however, when the brake pedal is depressed) Damaged or disconnected wiring of inhibitor switch input circuit Repair the harness or repair or replace the inhibitor switch Improper adjustment of inhibitor switch Malfunction of the ECM signals Check input and output signals at ECM Trouble Symptom 5 Trouble symptom Probable cause Remedy Cannot decelerate (coast) by using the "SET/–" switch Temporary damaged or disconnected wiring of "SET/–" switch input circuit Repair the harness or replace the "SET/–" switch Malfunction of the ECM signals Check input and output signals at ECM Trouble Symptom 6 Trouble symptom Probable cause Remedy Cannot accelerate or resume speed by using the "RES/+" switch Damaged or disconnected wiring, or short circuit, or "RES/+" switch input circuit Repair the harness or replace the "RES/+" switch Malfunction of the ECM signals Check input and output signals at ECM Trouble Symptom 7 Trouble symptom Probable cause Remedy CC system can be set while driving at a vehicle speed of less than 40km/h (25mph), or there is no automatic cancellation at that speed Malfunction of the vehicle-speed sensor circuit Repair the vehicle speed sensor system, or replace the part Malfunction of the ECM signals Check input and output signals at ECM Trouble Symptom 8 Trouble symptom Probable cause Remedy The cruise main switch indicator lamp does not illuminate (But CC system is normal) Damaged or disconnected bulb of cruise main switch indicator lamp Repair the harness or replace the part...