1.Turn ignition switch OFF and disconnect the battery negative (-) terminal.
2.Remove the fuse box cover.
3.Remove the starter relay (A).

4.Check for continuity between the terminals (30 and 87) using an ohmmeter.
| Terminal | Resistance | Measure | ||
| 30 - 87 | 1 MΩ or higher | If there is continuity between the terminals, replace the relay. | ||

5.Apply 12V to the terminal 85 and ground to the terminal 86 and then check for continuity between the terminals (30 and 87).
| Terminal | Resistance | Measure | ||
| 30 - 87 | 1Ω or less | If there is no continuity between the terminals, replace the relay. | ||

6.Install the starter relay.
7. Install the fuse box cover.
Starter
Ignition SystemHyundai Tucson (NX4) 2022-2026 Service Manual: Special Service Tools
- Special Service Tools
Tool (Number and Name)IllustrationUse
09581-11000Piston expander
Spreading the front disc brake piston
09527 - 2W110Sensor cap installer
Used for installing wheel speed sensor cap(Use with 09231-H1100)
09231 - H1100Handle
(Use with 09527-2W110)
...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Troubleshooting
- Troubleshooting
Error ItemFailure SymptomInspection Items Detailed Inspections Relevant Parts/Components
Screen displayLCD-TFT screen does not turn on1)Connector attachments
2)Components
1)Check the connector attachments
2)Check B+, IGN and GND wiring
3)Check the components
Con ...