Component Inspection

Visual Inspection
1. Check that MAFS is damaged, contaminated or deformed.
2. Check that air cleaner is clogged.
3. Has a problem been found?
  YES
  - Repair or replace as necessary and then go to VERIFICATION OF VEHICLE REPAIR procedure.
  NO
  - Go to "Check MAFS" as follows
Check MAFS
1. IG "OFF" and install a scan tool
2. ENG "ON" and monitor "MAFS" data on the service data.
3. Monitor signal waveform at signal terminal of MAFS with scan tool.
  Specification: Signal waveform will be displayed as follows. (Be aware that the signal of MAFS is not voltage display but frequency display.)
  
  Fig 1: MAFS Signal Waveform (1 Of 2)
  Courtesy of HYUNDAI MOTOR CO.
  
  Fig 2: MAFS Signal Waveform (2 Of 2)
  Courtesy of HYUNDAI MOTOR CO.
4. Are both service data and signal waveform displayed correctly?
  YES
  - Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to VERIFICATION OF VEHICLE REPAIR procedure.
    NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.
    Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others
  NO
  - Substitute with a known - good MAFS and check for proper operation. If the problem is corrected, replace MAFS and go to VERIFICATION OF VEHICLE REPAIR procedure.