W/Harness Inspection

Power Supply Circuit Inspection

1. Ignition "OFF"
2. Disconnect MAF sensor connector
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between terminal 2 of the sensor harness connector and chassis ground

Specification : Approx. B+




5. Is voltage within the specification ?






Signal Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Install scan tool and monitor the "MASS AIR FLOW (V)" parameter on the Scantool data list.

Specification : Approx. 0.1V

3. Is MAF (V) within the specification ?






Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found ?