Air flow meter (Discovery 1)

Checking the supply voltage - Figure 10

Technical conditions

Contacts	Position	Voltage
5 and mass	Ignition ON	battery

Make sure the ignition is off.

Disconnect the air flow meter electrical connector.

Turn on the ignition.

Measure the voltage between the wiring connector terminal and ground.

Signal Check - Figure 10

Technical conditions

Contacts	Position	Voltage
3 and mass	Ignition ON	0.2-0.7 V

Make sure the ignition is off.

Without disconnecting the electrical connector, remove the protective cover.

Turn on the ignition.

Measure the voltage between the wiring connector terminal and ground.