Throttle position sensor (Discovery 1)

Check - Figure 9

Technical conditions

Contacts	Throttle valve	Voltage
2 and mass	Closed	0.09-0.55 V
2 and mass	Fully open	4.2-4.9 V

Make sure the ignition is off.

Without disconnecting the sensor's electrical connector, remove the protective cover.

Turn on the ignition.

Measure the voltage between the contact and ground.

When measuring the voltage between pin 2 and ground, move the throttle valve.

(The original article is located on the website: «LRman.ru»)

The voltage should change smoothly.