LR3 sending units and GAP tool voltages....
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LR3 sending units and GAP tool voltages....
Anyone know the "nominal" voltages for sending units? I hate that the GAP tool can not read actual resistance like the Nanocom apparently can. All I can find is voltages. So after having a fuel supply issue I swap and entire tank over. Fixed supply issue (another thread). But now I notices my fuel readings are messed up. Today I was running low, 30 miles to empty. Parked at work on a slight uphill angle and when I fired the truck up, 117 til empty. Moved to a flat spot and restarted it to see what it would read, it was below E on the gauge and zero miles on cluster for range. Then when heading home it started at zero and climbed up to 26 or so. Trying to now figured out which is the issue, temped just to purchases two new ones and be done with it though...
So I did a test after work and read #1 at 1.5v and #2 at 0.8v. This was low fuel, 25 miles to empty. I added exactly 5 gallons. After #1 was 2.2v and #2 was 1.3v. I do know they should read different voltages and clearly both vary based on angle of truck, acceleration, etc. So one is not stuck at a value. But I have noticed #2 never goes below 0.7, ever. Thats the lowest value. #1, not sure as it seems to always read higher and seems to never get very low on voltage.
So I did a test after work and read #1 at 1.5v and #2 at 0.8v. This was low fuel, 25 miles to empty. I added exactly 5 gallons. After #1 was 2.2v and #2 was 1.3v. I do know they should read different voltages and clearly both vary based on angle of truck, acceleration, etc. So one is not stuck at a value. But I have noticed #2 never goes below 0.7, ever. Thats the lowest value. #1, not sure as it seems to always read higher and seems to never get very low on voltage.
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rumi409
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01-15-2020 06:23 PM