Engine "ON".

Install Scantool and monitor the "MASS AIR FLOW" parameter on the Scantool data list.

Specification : Approx. 10~20 kg/h at idle & No load

Is MAF sensor voltage near the specified value?

YES

▶ Check for poor connection between PCM 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 MAF for contamination, deterioration, or damage. Substitute with a known-good MAF and check for proper operation. If the problem is corrected, replace MAF and then go to "Verification of Vehicle Repair" procedure.