• The hydraulic system consists of a valve body, an oil filter and an oil pump.
• The oil pump is powered by the engine. ATF passes through the oil filter and gets distributed along the oil channels.
• The oil becomes highly pressurized as it exits the oil pump and passes through the line pressure valve before being fed to the clutch & brake control valve, clutch, and brakes.
• TCM controls the hydraulic pressure using solenoid valves and controls clutch and brake operations.

Hydraulic System
Electronic Oil Pump (EOP)Hyundai Tucson (NX4) 2022-2026 Owner's Manual: Operating the Power Liftgate
Power liftgate open/close button
(Smart key, Instrument panel)
When the liftgate is closed, press the
power liftgate open/close button for 1
second. The power liftgate opens with a
warning sound.
While the liftgate is opening, press the
button to stop liftgate operation.
When the po ...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Smart Key Diagnostic
- Inspection
Self Diagnosis With Scan Tool
It will be able to diagnose defects of SMART KEY system with diagnostic
tool quickly. diagnostic tool can operates actuator forcefully,
input/output value monitoring and self diagnosis.The following three
features will be major problem in SMART KE ...