LIN Communication Line Inspection

WARNING: This page is about a different car, the 2020 Kia Sorento. However, it is still accessible from the selected car via links, so may be relevant.

Engine "ON"
Perform "Oscilloscope" procedure.
Set WIPER & MIST SWITCH" up "INT (Auto)".
Measure the signal waveform between "RAIN SENSOR_LIN LINE" Pin No. 2 (LIN) terminal of "BCM" harness connector and chassis ground.
Specification: Refer to Figure below

Courtesy of KIA MOTORS AMERICA, INC.
Is the measured value within specification?
YES
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
- Repair or replace as necessary, go to "VERIFICATION OF 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.
- Repair or replace as necessary, go to "VERIFICATION OF REPAIR " procedure.