Thread: High/Low Range - Crossed wires or Nanocom?

Carl, mine does the same Hi/Lo reversed,think it is a Nanocom thing!

It's the Nanocom....
I no longer own a Nanocom but when I did i found the same problem
I reported this & other issues to BBS
Mine had other live data issues with the transmission & my concern was if the Nanocom thinks the TC is in low when in high & vice versa, how can it accurately report electronic data/faults with the transmission because high vs low range changes transmission functions

Brilliant, thanks guys

I'm in two minds about this one.

The ECU internally represents High Range as Logic 0 (otherwise known as Low or Off) and Low Range as Logic 1 (otherwise know as High or On).

If you look at from that perspective the High and Low accurately reflects how the ECU stores the switch position, but it is counter intuitive if you don't know that (and even if you do).

The Nanocom is essentially a diagnostic reader - it reads data from the ECU, does minimal processing to convert to correct units and then displays the results. It's not a smart device performing complex math on the basis of the readings so it can't be compromised by something like an inverted meaning of the switch. The Nanocom is still reading a 0 or 1 from the ECU which represents the state of the switch - it's just programmed to display Low when the value is 0 and High when the value is 1.

There are definitely dodgy features to the Nanocom's data displays - the fact that the Autobox module only displays whole numbers is a doozy. The modulation pressure is measured in Bar so you can only ever see 0bar, 1bar(14.5 psi), 2 bar(29psi) or 3bar (43.5psi). I discovered when I hooked up a X431 iDiag that the ECU actually reports all data to two decimal places. Having pressure readings with a step resolution of 1 bar is as useful as a fuel gauge that only reads full and empty.

cheers
Paul

I have found with the Nanocom, that if something is working as it should, and the readings are indicating the opposite, then don't change anything.

There are a few things that read different to what you would expect.

Okay so I too have noticed the same issue. (I have Nanocom)
From my reading, I understand when in High you have a more responsive accelerator pedal, IE: full rev range with-in the say first half or 2/3 of accelerator travel. In Low range your pedal uses all of the pedal travel so over rough/uneven ground you get less of a rev change when your right foot moves.


My disco, I believe, is wrong. High range it feels like I need to move the pedal heaps for engine response. Low range (from what I can remember), when going over rough ground, the slightest movement with my right boot seems the engine is very responsive. I can't confirm this at the moment as the vehicle is in a million pieces!


Anyone else experienced this?...(or am I dreaming?)


The other thing is I don't know how I would 'correct it' if it is a simple on/off switch, you can't just reverse switch....


Cheers,

Mine feels similar, but HDC works only in low range, so I suspect it's correct. Probably an effect of the lower range gears?

I wonder if the ECU and SLABS get the same signal.

Originally Posted by Disco 2 Driver

My disco, I believe, is wrong. High range it feels like I need to move the pedal heaps for engine response. Low range (from what I can remember), when going over rough ground, the slightest movement with my right boot seems the engine is very responsive. I can't confirm this at the moment as the vehicle is in a million pieces!