Signal Circuit Inspection

WARNING: This page is about a different car, the 2016 Hyundai Genesis and 2015 Hyundai Genesis. However, it is still accessible from the selected car via links, so may be relevant.

IG Key "ON", Engine "ON".
Perform "OSCILLOSCOPE " procedure in the "Diagnosis" with GDS.
Set WIPER & MIST SWITCH" up "INT (Auto)".
Measure the signal waveform between "RAIN SENSOR_LIN LINE" terminal of "BCM" harness connector and chassis ground.
■ Specified Data

Fig 1: Measuring Signal Waveform Between Rain Sensor LIN Line Terminals
Courtesy of HYUNDAI MOTOR AMERICA
Does the measured signal waveform follow the Specified Data?
YES
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
- Repair or replace as necessary, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- If the voltage of measured signal waveform is the battery voltage level (about 12V),
  → Check LIN line short to battery.
  
  → Check LIN line open/poor connection.
- If the voltage of measured signal waveform is the ground voltage level (about 0V), check LIN line short to ground.