FENDT FAVORIT 900 - Electrical circuit diagram - switches;buttons;controls

Farmer 400
Fav 700
Fav 900
Electronics / Sensors
Electrical circuit diagram - switches/buttons/controls
A
General
23.2.2001
9700 000011
A
a
1/1
Capitel Docu-No.
Index
Date Version
Page
Electrical circuit diagram - switches/buttons/controls
PM-Picturemodule
Text-module
Switch pin assignment
1=Earth
2=Switch on / off
3=Light switch on / off
Text-module
Measure resistance at pin 2 and pin 1
Switch open
Resistance R =
510 ohms
Switch closed
Resistance R = 1 / (1/510 + 1/160) =
121 ohms
Text-module
Measure signal voltage at pin 2 and pin 1
ECU A002 supplies basic signal voltage of approx. 8.0 VDC to pin 2.
Switch open
Resistance R = 510 ohms => signal voltage (between pins 2 and 1) = 5.1 VDC
Switch closed
Resistance R = 121 ohms => signal voltage (between pins 2 and 1) = 2.4 VDC
Text-module
Measure "Lighting switch" voltage at pin 3 and pin 1.
Voltage = 0 VDC or 12 VDC (depending on switch position )
Text-module
Note:
Functional description of sensors and ECU A002 - Chapter 9700 Index A
Electrical circuit diagrams - Chapter 9000 Index C
Electrical / electronic components - Measuring and testing - Chapter 9000 Index E
PMTAB_Picture