Component Inspection

Engine "ON".
Connect Scan Tool and monitor the "MASS AIR FLOW(V)" parameter on the Scan tool data list.
Monitor the "MASS AIR FLOW(V)" parameter on the Scan Tool.
Specification:

Approx. 0.6 ~ 1.0V at idle & No load

Approx. 1.0~1.3V at idle & A/C "ON"

Fig 1: Monitoring "MASS AIR FLOW(V)" Parameter On Scan Tool
Courtesy of HYUNDAI MOTOR CO.
Is MAF sensor voltage within the specification?
YES:
- Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO:
- Check MAFS for contamination, deterioration, or damage. Substitute with a known-good MAFS and check for proper operation. If the problem is corrected, replace MAFS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.