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 " 2Check MAFS" as follows
Check MAFS
1. IG "OFF" and install a scantool
2. ENG "ON" and monitor "MAFS" data on the service data.
3. Monitor signal waveform at terminal 1 of MAFS with scantool.
  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 Terminals Waveform Signal On Scantool
  Courtesy of HYUNDAI MOTOR CO.
4. Are both service data and signal wave form displayed correctly ?
  YES
  - Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  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.