Airflow meter - testing

Fuel and exhaust systems - Digijet fuel injection / Airflow meter - testing

The efficiency of the airflow meter in the inlet manifold is checked by measuring the resistance value between contacts 1 and 4 of the control unit plug (see illustrations).

4.1a Control unit plug showing terminal connectors

4.1b Intake air temperature sender resistance graph

The potentiometer is measured in the same manner by connecting the probes to terminals 2 and 3 and simultaneously operating the airflow sensor plate. The resistance reading must be seen to fluctuate.