Could someone tell what the correct resistance acros the temperature sender of a 300 tdi (discovery) is supposed to be? Mine is 1 M ohm when cold and 300 K ohm when warm. The temperature gauge doesn't move cold or warm.
Thx.
Resistance temperature sender 300tdi
Oct 03, 2003
2 Replies
The general way to test the curcuit is to substitute a 21 watt bulb for the sensor and the gague should read ful scale, that should tell you if its the gague or the sensor at fault.
Peter S
The chart below is from the D-90.com FAQ. Looks like the sensor is gone.
Readings should be: Coolant temp Ohm meter reading
------------------ --------------------- C F OHMS
-10 14 9100-9300
0 32 5700-5900 20 68 2400-2600 40 104 1100-1300 60 140 500-700 80 176 300-400 100 212 150-200Cheers
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