
– 1st warning: If you open the driver's door after you open and then close the rear passenger and turn the engine off, the system provides warning by showing message on the cluster and giving voice instruction.
– 2nd warning
1)The system detects the indoor movement using the rear occupant alert sensor installed on the head lining when the driver gets off the vehicle and locks all the doors.
2)If any movement inside the vehicle is detected, horn and Hazard Warning Flasher are activated for 25 seconds and the mobile text message is sent.


1. Rear Occupant Alert Sensor
2. Integrated body control unit
3. Cluster (Message pop-up and Voice)
1.Disconnect the negative (-) battery terminal.
2.Remove the cover (A) by using a flat-tip screwdriver.

3.Disconnect the connector (A) and then remove the occupant alert sensor.

1.Install the occupant alert sensor.
2.Connect the negative (-) battery terminal.
Daytime Running Light (DRL)Hyundai Tucson (NX4) 2022-2026 Service Manual: AVN Head Unit
- Components
NoConnector A (ExternalAmplifier)Connector A (Internal Amplifier)Connector BConnector C
1- Rear door speaker LH (+)Mic2 (+) -
2- Rear door speaker LH (-)Mic1 (+) I -CAN (High)
3Navigation voice (+)---
4External amplifier SPDIF (+)-- -
5ResetReset--
6Camera power Camera pow ...
Hyundai Tucson (NX4) 2022-2026 Service Manual: Specifications
- Specifications
Audio Unit
ItemSpecification
Power supplyDC 14.4V
Parasitic currentMax. 40W X 4
Impedance4 Ω x 4
Antenna80PF 75Ω
Tuning typePLL synthesized type
Frequency range /Channel spaceFM87.5 ~ 108.0 MHz/100 KHz
AM531 ~ 1602 KHz/9 KHz
...