CAN Communication Line Inspection

WARNING: This page is about a different car, the 2018 Hyundai Accent. However, it is still accessible from the selected car via links, so may be relevant.

Connect SRSCM and Body Sensor OCU (ECU) connector.
IG KEY ON.
Measure signal waveform between CAN HIGH terminal of Body Sensor OCU (ECU) and chassis ground.
Measure signal waveform between CAN LOW terminal of Body Sensor OCU (ECU) and chassis ground.
Specification: Refer to Signal Waveform And Data
Is the measured signal waveform normal?
YES
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
- Repair or replace as necessary and then go to "Verification of Vehicle Repair " procedure.
NO
- Check a circuit open and short of the CAN Communication Line, and then go to "Verification of Vehicle Repair " procedure.
- Substitute the Body Sensor OCU (ECU) or SRSCM and check for proper operation.
  If the problem is corrected, replace (OCCUPANT CLASSIFICATION SYSTEM (OCS) ) or SRSCM and then go to "Verification of Vehicle Repair " procedure and Go to "Body Sensor Reset " procedure.