Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
Mass Airflow (MAF) meter uses a platinum hot wire which is maintained at a constant temperature by controlling the current flow through the hot wire. Current flow is then measured as an output voltage. MAF meter may also be referred to as airflow meter. DTC is set when ECM detects MAF meter output is greater than 2.2 volts with throttle valve closed for more than 10 seconds with engine speed of 900 RPM or less, or MAF meter output is less than one volt with Throttle Position (TP) sensor VTA circuit signal voltage of .63 volt or more for more than 6 seconds with engine speed of 1500 RPM or more. Possible cause is defective MAF meter.