CAN Signal Inspection
WARNING: This page is about a different car, the 2017 Kia Optima. However, it is still accessible from the selected car via links, so may be relevant.
- Connect all unit/module's connector.
- Ignition "ON", Engine "OFF".
- Perform "Oscilloscope" procedure.
- Measure the signal waveform between "C_CAN High" terminal (PIN No. 15) of GATEWAY harness connector and chassis ground.
- Measure the signal waveform between "C_CAN LOW" terminal (PIN No. 16) of GATEWAY harness connector and chassis ground.
Specification : Refer to below
- Is the measured value within specification?
YES
- Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, or damage.
- Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Repair open or short in CAN communication circuit and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.