Contents:
| Items | Specifications | |
| Rated voltage | 5V | |
| Load | Max. 1mA (When head lamp lighting) | |
| Illuminations (LUX) | 50 | 1.42 ± 0.31V |
| 100 | 2.63 ± 0.58V | |
| 150 | 3.84 ± 0.84V | |

1. Auto light sensor
2. Head lamps
3. Lighting switch (Auto)
4. Tail lamps
5. BCM (Body Control Module)

1.Oprate the auto light swith, then check for continuity between terminals of multi-function switch connector.

| Switch Position | SwitcH Terminal | Resistance (Ω, ±3.5%) |
| OFF | 9-14 | 680 |
| AUTO / DRL | ∞ | |
| Tail lamp | 1680 | |
| Low beam | 1680 |
1.Disconnect the negative (-) battery terminal.
2.Remove the photo & auto light sensor (A) from crash pad upper side by using screw (-) driver.

3.Remove the auto light connector.
1.Reconnect the auto light connector.
2.Install the auto light sensor.
Hyundai Accent (HC) (2017 - 2022) Service Manual: Description and Operation
- Description The SMART KEY system is a system that allows the user to access and operate a vehicle in a very convenient way. To access the vehicle, no traditional key or remote control unit is needed.The user carries a SMART KEY FOB which does not require any conscious actions by the user (e.g. operate a RKE button). The SMART KEY system is triggered by pressing a push button in the door handle.