Hyundai Sonata: Seat Electrical / Power Seat Motor Repair procedures

Hyundai Sonata LF 2014-2019 Service Manual / Body Electrical System / Seat Electrical / Power Seat Motor Repair procedures

Inspection

Diagnosis with GDS

The body electrocal system can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).

The diagnostic system (GDS) provides the following information.

(1)	Self diagnosis : Checking the failure code (DTC) and display

(2)	Current data : Checking the system input/output data state

(3)	Actuator test : Checking the system operation condition

(4)	Additional function : Other controlling such as he system option and zero point adjustment

2.	Select the "Car Model" and the system to be checked in order to check the vehicle with the tester.

3.	Select the "Power Seat Module (PSM)" to check the power seat module (PSM).

4.	Select the "Current Data" menu to search the current state of the input/output data. The input/output data for the sensors corresponding to the power seat module (PSM) can be checked.

5.	If you will check the power door lock operation forcefully, select "Actuation test".

Power Seat Motor

1.	Disconnect the connectors for each motor. [Slide Motor] [Rear Height Motor] [Front Height Motor] [Reclining Motor] [Lumbar Support Motor]

2.	With the battery connected directly to the motor terminals, check if the motors run smoothly.

3.	Reverse the connections and check that the motor turns in reverse.

4.	If there is an abnormality, replace the motors. [Driver / Assist]

Reclining Motor Limit Switch

The power seat motor(IMS specification) mounted in this vehicle uses the hole sensor to calculate the maximum operation distance, so it does not require limit switch.

But, NON- IMS specification driver seat and passenger seat have limit switches in the motor in the back of the chairs.

1.	Disconnect the limit switch and operate the limit switch.

2.	Check for continuity between the terminals.

3.	Make sure that the seat operation is normal in the reverse after the maximum operation.

4.	If there is an abnormality, replace the limit switch.

Remove

Front Seat

1.	Disconnect the battery terminals.

2.	Remove the front seat assembly. (Refer to Body - "Front Seat Assembly")

Power Seat Motor Components and Components Location

Component Location 1. Slide motor2. Front height motor3. Air ventilation seat blower4. Reclining motor5. Lumbar support motor (Vertical)6. Lumbar support motor (Horizontal)7. Rear height motor8. ...

Power Seat Control Switch Schematic Diagrams

Circuit Diagram ...

Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: Pre-tensioner seat belt (Driver and front passenger)
Retractor Pre-tensioner Your vehicle is equipped with driver’s and front passenger’s Pre-tensioner Seat Belts. The purpose of the pretensioner is to make sure the seat belts fit tightly against the occupant’s body in certain frontal collisions. The pre-tensioner seat belts may be activated ...

Hyundai Sonata LF 2014-2019 Owners Manual: Remote key precautions
The remote key will not work if any of the following occur: The key is in the ignition switch. You exceed the operating distance limit (about 90 feet [30 m]). The remote key battery is weak. Other vehicles or objects may be blocking the signal. The weather is extremely cold. The remote key is ...