CAN communication Line signal waveform Inspection

■ Check CAN communication 

1. Ignition "OFF"
2. Connect all control module connector.
3. Ignition "ON".
4. Make CAN communication wake up status
5. Back probe and measure signal waveform of Pin No. 11 (Low) terminal of Data Link Connector (DLC) and chassis ground with VMI.
6. Back probe and measure signal waveform of Pin No. 3 (High) terminal of Data Link Connector (DLC) and chassis ground with VMI.

   Specification:  Refer the specifications in Figure below

   Fig 1: Screen Display - Normal C-CAN Signal Waveform

   Courtesy of KIA MOTORS AMERICA, INC.
7. Are the parameters displayed correctly?

   YES 

   • Fault is intermittent caused by poor contact in the sensor's and/or SRSCM's connector or was repaired and SRSCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair " procedure.

   NO 

   • Go to "CAN register and communication line inspection " procedure.