1.In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (diagnostic tool).The diagnostic system (diagnostic tool) provides the following information.
(1)Fault Code Searching : Checking failure and code number (DTC)
(2)Data Analysis : Checking the system input/output data state
(3)Actuation test : Checking the system operation condition
(4)S/W Management : Controlling other features including system option setting and zero point adjustment
2.If diagnose the vehicle by diagnostic tool, select "DTC Analysis" and "Vehicle".

3.Select the 'Data Analysis' and 'Car model'.

4.Select the 'IBU_BCM' to search the current state of the input/output data.


5.To forcibly actuate the input value of the module to be checked, select option 'Actuation Test'.

1.isconnect the negative (-) battery terminal.
2.Remove the heater and A/C controll unit.(Refer to Heating,Ventilation, Air Conditioning - "Heater & A/C Control Unit (Manual)")(Refer to Heating, Ventilation, Air conditioning - "Heater & A/C Control Unit (DATC)")
1.Install the heater and A/C control unit.
2.Connect the negative (-) battery terminal.
Rear Glass Defogger Printed HeaterHyundai Tucson (NX4) 2022-2026 Owner's Manual: Auto Hold. Warning messages
Auto Hold maintains the vehicle in a
standstill even though the brake pedal is
not depressed after the driver brings the
vehicle to a complete stop by depressing
the brake pedal.
Information
When the vehicle is restarted, the last
setting for Auto Hold is applied.
To apply:
Type A
...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Troubleshooting
- Troubleshooting
SymptomSuspect area
Engine will not start or hard to startVapor hose damaged or disconnected
Engine struggles to startMalfunction of the Purge Control Solenoid Valve
Rough idle or engine stallsVapor hose damaged or disconnected
Malfunction of the PRV (Pressure Regulating Val ...