Monitor SCANTOOL Data

Connect scan tool to data link connector (DLC).
Engine "ON".
Monitor the "CAN COMMUNICATION SERVICE DATA (ENGINE RPM, VEHICLE SPEED SENSOR, THROTTLE P. SENSOR)" parameters on the scan tool.
Compare it with reference data as below.

Fig 1: Monitoring "CAN Communication Service Data (Engine RPM, Vehicle Speed Sensor, Throttle P. Sensor)" Parameters On Scan Tool
Courtesy of HYUNDAI MOTOR CO.
Does "CAN BUS LINE DATA" follow the reference data?
YES:
- Fault is intermittent caused by poor contact in the sensor's and/or PCM/TCM's connector or was repaired and PCM/TCM memory was not cleared. And go to VERIFICATION OF VEHICLE REPAIR procedure.
NO:
- Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.